Light transmission and distribution in vegetable greenhouses
|
|
- Angel Briggs
- 6 years ago
- Views:
Transcription
1 Light transmission and distribution in vegetable greenhouses Canadian Greenhouse Conference, 5 October 2016, Niagara Falls, Canada Dr. Silke Hemming, Wageningen University & Research Centre
2 Light is (almost) never too much: yield increase per % light increase Crop % Yield increase Lettuce 0.8 Radish 1 Cucumber Tomato Rose Chrysanthemum 0.6 Pointsettia Ficus benjamina 0.6 Source: Marcelis et al., 2006
3 Diffuse light
4 Potential diffuse light in different climates Amount of direct / already diffuse light varies in different climates Cold winter climate e.g. The Netherlands Mild winter climate e.g. Mediterranean (Semi-)arid climate e.g. Middle-East Increase potential of diffuse coverings Hemming et al. (2008)
5 Diffuse light crop effects Li (2014)
6 Horizontal light distribution at crop level Reference Lichtintensiteit (%) Lengte rij ( cm ) Pad Diff71 Diffuse Lichtintensiteit (%) Pad Lengte rij ( cm ) Dueck et al. (2012)
7 Diffuse light crop effects Li (2014)
8 Vertical light distribution in crop - cucumber Crop height [cm] April May 25 th May 23 3 rd rd,, Clear Diffuse Clear Diffuse Light interception [%] Hemming et al. (2007)
9 Diffuse light crop effects Li (2014)
10 Photosynthesis net - high-wire cucumber Dueck et al. (2009)
11 Photo-inhibition - tomato Dueck et al. (2012)
12 Diffuse light crop effects Li (2014)
13 Crop yield - cucumber high-wire Cumulatief productie (kg/m2 Production (kg m -2 ) % +6.5% Hoog diffuus Laag diffuus Controle Weeks Weeks High diffuse Low diffuse Diffuse light: 9% higher cucumber production (crop planted in March) Dueck et al. (2008)
14 Diffuse light sweet pepper ca. 5% more yield
15 Diffuse light cucumber 4-10% more yield Hemming et al. (2006, 2008)
16 Diffuse light tomato 8-10% more yield
17 Glasses Plastic films Increased light scattering
18 Diffuse light
19 Optical properties light quantity Light (PAR) Covering material Absorption Reflection increases Transmission decreases 1 Absorption Reflection = Transmission
20 Measurement light quantity Measure angular and hemispherical light transmission NOT perpendicular light transmission Transmission τ [%] T HEM 2 pi pi / = 2 pi pi / 2 0 T ( φ, θ ) I( φ, θ )sin( θ )cos( θ ) dθdφ 0 I( φ, θ )sin( θ )cos( θ ) dθdφ Angle of incidence ΘΘ i [ o ] Wageningen UR Transvision Integrating Sphere for hemispherical light transmission measurement 20
21 Optical properties light geometrical distribution Light (PAR) Diffuse structure Covering material Diffuse pigments Transmission Geometrical distribution
22 Materials and Methods - Equipment Measure Haze or even better BTDF scattering Radiant IS-SA Imaging Sphere for Scatter and Appearance Measurement at Wageningen UR Lightlab 22
23 Diffuse coverings plastics Plastic films
24 Hemispherical light transmission τ h vs. haze η hemispherical transmission [%] y = -0.16x R² = haze [%]
25 Diffuse coverings - PE/EVA plastic films Amount of scattering Amount of light Code Material Haze η Hemispherical transmission τ h PK14A Clear film AD PK14C Normal film PK14D Normal film AD PK14B Extra diffuse film
26 Light Diffusing Materials high η, high τ h ETFE medium diffusion, 80 µm AS ETFE high diffusion, 100 µm AS HDPE medium diffusion, 80µm BR HDPE high diffusion, 80µm BR haze hemispherical transmission
27 Diffuse coverings glasses Glasses
28 Diffuus en anti-reflectie: transmissie material haze hemispherical transmission A A 0 AR 87.1 A 0 ARAR 90.2 A LH A LH AR 86.2 A LH ARAR 89.2 A HH A HH AR 82.2 A HH ARAR % per side
29 Results - glass Material * with anti-reflection coating Code Light transmission perpendicular Light transmission hemispherical Haze F-scatter τ p τ h η Φ Traditional greenhouse glass PLA Clear glass* R Matt/matt glass low diffusion* SG Matt/matt glass medium diffusion* SG Prismatic glass high diffusion* SG Etched glass high diffusion* DA Etched glass extra high diffusion* DA Paraboloid glass extra high diffusion SG Motheye microlens extra high diffusion NO12J Lambertian diffusor L
30 Results - glass Material * with anti-reflection coating Code Light transmission perpendicular Light transmission hemispherical Haze F-scatter τ p τ h η Φ Traditional greenhouse glass PLA Clear glass* R Matt/matt glass low diffusion* SG Matt/matt glass medium diffusion* SG Prismatic glass high diffusion* SG Etched glass high diffusion* DA Etched glass extra high diffusion* DA Paraboloid glass extra high diffusion SG Motheye microlens extra high diffusion NO12J Lambertian diffusor L
31 Results- BTDF glass 2D plot of calculated angular energy distribution E(θθ tt ) based on measured BTDF of different glasses η=100% Φ=100% η=100% Φ=98% η=97% Φ=82% η=94% Φ=79% 31
32 Conclusions diffuse materials Measure hemispherical light transmission & haze & Fscatter Covering materials with higher light scattering increase production (at same light transmission!) Materials with different scattering distribution (Fscatter) are available, choose right material for crop Covering materials with significantly reduced hemispherical transmission can cause production decreases (if light is limiting factor)
33 Screens Coatings Other materials Increased light scattering
34 Thank you for your attention! 34
General. Advanced covering materials The future? 3/11/2008. Greenhouse coverings. General. Glass. Silke Hemming, Wageningen UR Greenhouse Horticulture
Advanced covering materials The future? Silke Hemming, Wageningen UR Greenhouse Horticulture Greenhouse coverings Glass Floatglass Greenhouse glass White glass Low iron, Crystal Clear, Optiwhite, Clear
More informationNew Glass Coatings for High Insulating Greenhouses without Light Losses - Energy Saving, Crop Production and Economic Potentials
New Glass Coatings for High Insulating Greenhouses without Light Losses - Energy Saving, Crop Production and Economic Potentials S. Hemming a, F.L.K. Kempkes and V. Mohammadkhani Wageningen UR Greenhouse
More information17/08/2015. Energy saving goals in The Netherlands
Innovations in greenhouse systems energy conservation by system design, sensors and decision support systems ISHS Greensys215 S. Hemming, J. Balendonck, J.A. Dieleman, A. de Gelder, F.L.K. Kempkes, G.L.A.M.
More informationDiffuse Greenhouse Covering Materials Material Technology, Measurements and Evaluation of Optical Properties
Diffuse Greenhouse Covering Materials Material Technology, Measurements and Evaluation of Optical Properties S. Hemming, V. Mohammadkhani and T. Dueck Wageningen UR P.O. Box 16, Bornsesteeg 65 6700 AA
More informationOutline. New technologies developed for conventional growing systems: possibilities and limitations for application in organic systems.
New technologies developed for conventional growing systems: possibilities and limitations for application in organic systems. sjaak.bakker@wur.nl www.glastuinbouw.wur.nl Final remarks Acknowledgements
More informationOptical coatings to increase the yield and quality of. protected salads, fruit and ornamental crops. Project title: Project number: CP147
Project title: Optical coatings to increase the yield and quality of protected salads, fruit and ornamental crops Project number: CP147 Project leader: Professor Simon Pearson Report: Final Report, May
More informationPro's and Con's in relation to climate, crop management and systems. Frank Kempkes. Theo Gieling, Jouke Campen, Marcel Raaphorst
Semi closed greenhouse: Pro's and Con's in relation to climate, crop management and systems Theo Gieling, Jouke Campen, Marcel Raaphorst Presentation guide Greenhouse growing: Goals & Means Define goals
More informationDiffuse light and light spectrum in relation to pollination, fruit setting, and insects in tomatoes
Diffuse light and light spectrum in relation to pollination, fruit setting, and insects in tomatoes Literature study commissioned by Koppert Biological Systems Jan Janse Report WPR-702 Abstract We were
More informationI am Feije de Zwart and I am working for already more than 20 years on modelling and experiments on energy conservation techniques in Horticulture.
Good morning, I am Feije de Zwart and I am working for already more than 20 years on modelling and experiments on energy conservation techniques in Horticulture. Today I was asked to tell something about
More informationEmission-less greenhouses: dream or reality?
Workshop sustainable greenhouse 1 Emission-less greenhouses: dream or reality? Cecilia Stanghellini, Wageningen UR Greenhouse Horticulture cecilia.stanghellini@wur.nl EUPHOROS: Efficient Use of inputs
More informationJeroen van Leeuwen Roel Weijers
15-4-2016 Jeroen van Leeuwen Roel Weijers 1 - Horticulture - ReduSystems - Cleaning, paints, AnciCondens coatings - Sports - Maintenance Mardenkro International Branches Netherlands (HQ) Canada China Japan
More informationArtificial Lighting in Greenhouse Horticulture. Tom Dueck & Frank Kempkes Wageningen UR Glastuinbouw 22 September 2011
Artificial Lighting in Greenhouse Horticulture Tom Dueck & Frank Kempkes Wageningen UR Glastuinbouw 22 September 2011 Developments in Lighting Spectral photosynthetic efficiency Lighting without sunlight
More informationPhysical Features of Plastic Films Guidelines on Handling Plastic Films
Physical Features of Plastic Films Guidelines on Handling Plastic Films Dr.-Ing. Burkhard von Elsner Horticultural engineering expert Hannover, Germany b.von.elsner@sv-gartenbautechnik.de Thursday, 7 January
More informationDevelopment of high efficient and energy saving greenhouse systems in the Netherlands
Development of high efficient and energy saving greenhouse systems in the Netherlands Horticulture Forum: The High Efficiency and Energy Saving Production in Agriculture Greenhouse April 18 th 2011, Taipei,
More informationtowards no-emission greenhouses Cecilia Stanghellini, Wageningen UR Greenhouse Horticulture
Il progetto EUPHOROS: towards no-emission greenhouses Cecilia Stanghellini, Wageningen UR Greenhouse Horticulture cecilia.stanghellini@wur.nl Aim of the project To reduce the use of: non-renewable Energy
More informationTopics. Glazing Materials. Glass. Hail damage. Light transmittance through glazing material. Glass Rigid panels Film plastic.
Topics Glazing Materials Kimberly Williams Glass Rigid panels Film plastic Light transmittance through glazing material Light transmittance through glazing material www.wikipedia.org Rate of photosynthesis
More informationEnergy saving in greenhouses based on crop physiology Prof Dr Leo Marcelis
Energy saving in greenhouses based on crop physiology Prof Dr Leo Marcelis Chair Horticulture & Product Physiology Wageningen University, Netherlands. Leo.Marcelis@wur.nl Yield (kg m ² yr ¹ ) In greenhouses:
More informationIntelligent water use in horticulture trends in Dutch research Public workshop 20 th August 2010 UWS Hawkesbury, Australia
Intelligent water use in horticulture trends in Dutch research Public workshop 20 th August 2010 UWS Hawkesbury, Australia Silke Hemming Wageningen UR Greenhouse Horticulture, NL silke.hemming@wur.nl International
More informationEconomic evaluation of input reductions in protected cultivation in Europe
Economic evaluation of input reductions in protected cultivation in Europe Workshop Results of the EU Project Euphoros - Efficient Use of inputs in Protected HORticulture 6th October 2011, Donnalucata,
More informationGrowth of tomatoes under hybrid LED and HPS lighting systems
Growth of tomatoes under hybrid LED and HPS lighting systems Tom Dueck, Jan Janse, Barbara Eveleens, Frank Kempkes & Leo Marcelis June 8, 2011 Wageningen UR Greenhouse Horticulture Vragen, knelpunten 1.
More informationABSTRACT Light has to be optimized, as well as other growing factors, for an optimum greenhouse production.
1 of 8 7/14/2011 9:51 AM Optimizing the light Interlighting, LEDs and new coverings are contributing to optimize conditions Written by Dr. Nicolas Castilla Dr. Nicolas Castilla is research coordinator
More informationExchange of Knowledge between Research and Horticultural Practice through the Internet
Exchange of Knowledge between Research and Horticultural Practice through the Internet F. Buwalda, G.J. Swinkels, F. de Zwart, J. Kipp and F. Kempkes Wageningen UR Greenhouse Horticulture P.O. Box 16 6700
More informationSimulated Effects of Dynamic Row Spacing on Energy and Water Conservation in Semi-Arid Central California Greenhouses
Simulated Effects of Dynamic on Energy and Water Conservation in Semi-Arid Central California Greenhouses A. Moya, T. Mehlitz, I. Yildiz and S.F. Kelly Department of BioResource and Agricultural Engineering
More informationETFE Foil for Greenhouse. AGC Green-Tech Co.Ltd.
ETFE Foil for Greenhouse AGC Green-Tech Co.Ltd. Asahi Glass Company Profile 1. Founded September 8, 1907 * The first sheet-glass producer in Japan Toshiya Iwasaki Hand blow method 2. Sales JPY 1,148 billion
More informationDesign of a Solar Greenhouse with Energy Delivery by the Conversion of Near Infrared Radiation - Part 1 Optics and PV-cells
Design of a Solar Greenhouse with Energy Delivery by the Conversion of Near Infrared Radiation - Part Optics and PV-cells P.J. Sonneveld, G.L.A.M. Swinkels and G.P.A. Bot Wageningen UR Greenhouse Horticulture
More informationNRC CONSTRUCTION TECHNOLOGY UPDATE
NRC CONSTRUCTION TECHNOLOGY UPDATE No. 82, June 2014 Performance of Tubular Daylighting Devices By A. Laouadi and H.H. Saber Tubular daylighting devices (TDDs) can economically admit natural light into
More informationClimatic Evaluation of Semi-Closed Greenhouses
Climatic Evaluation of Semi-Closed Greenhouses J.B. Campen a and F.L.K. Kempkes Wageningen UR Greenhouse Horticulture PO Box 644 6700 AA Wageningen The Netherlands Keywords: air ducts, climate control,
More informationLeading the future of Agriculture today. Value adding solutions for agriculture film and irrigation systems
Leading the future of Agriculture today Value adding solutions for agriculture film and irrigation systems More food with less water Borouge is committed to addressing the challenges of increasing food
More informationHorticultural Lighting in the Netherlands: New Developments
Horticultural Lighting in the Netherlands: New Developments E. Heuvelink and M.J. Bakker L. Hogendonk, J. Janse, R. Kaarsemaker and Wageningen University R. Maaswinkel Horticultural Production Chains group
More informationSIMGreen: A Simulation Tool for the Greenhouse Climate
SIMGreen: A Simulation Tool for the Greenhouse Climate José Boaventura Cunha CETAV - Centro de Estudos Tecnológicos do Ambiente e Vida UTAD University, Engenharias II, Vila Real Portugal, jboavent@utad.pt
More informationOur anti-reflective treatment increases permeable light and reduces reflective glare to the point where the glass is practically invisible.
D.A. Glass America, along with DA Glass in Poland, conducts advanced research and applications in light optics used in renewable energy. Thanks to our use of nano-technology and chemical treatment to alter
More informationLED it be: controlling plant production by LED Light Prof Dr Leo Marcelis
LED it be: controlling plant production by LED Light Prof Dr Leo Marcelis Chair group Horticulture & Product Physiology Wageningen University, Netherlands. Leo.Marcelis@wur.nl Area (ha) Power (W/m 2 )
More informationSide by side tests of two SDHW systems with solar collectors with and without antireflection treatment
Downloaded from orbit.dtu.dk on: Mar 31, 2018 Side by side tests of two SDHW systems with solar collectors with and without antireflection treatment Kong, Weiqiang; Han, Jiangong; Perers, Bengt; Furbo,
More informationPROJECT OF GREENHOUSE FOR INTERNALLY DISPLACED PEOPLE IN TSEROVANI, GEORGIA
PROJECT OF GREENHOUSE FOR INTERNALLY DISPLACED PEOPLE IN TSEROVANI, GEORGIA Georgian Development Mission, NGO, not for profit organization focuses on building resilient and sustainable livelihoods particularly
More informationTowards a More Sustainable, Water Efficient Protected Cultivation in Arid Regions
Towards a More Sustainable, Water Efficient Protected Cultivation in Arid Regions J. Campen Wageningen UR Greenhouse Horticulture Wageningen The Netherlands Keywords: closed greenhouse, dynamic simulation
More informationCover Materials Excluding Near Infrared Radiation: Effect on Greenhouse Climate and Plant Processes
Cover Materials Excluding Near Infrared Radiation: Effect on Greenhouse Climate and Plant Processes F. Kempkes 1, C. Stanghellini 1, S. Hemming 1 and J. Dai 1, 2 1 Wageningen UR Greenhouse Horticulture,
More informationThermal performance characterization of a modular system for facade CARDOSO, C., a, JALALI, S.,b
Thermal performance characterization of a modular system for facade CARDOSO, C., a, JALALI, S.,b Department of Civil Engineering University of Minho Campus de Azurém, Guimarães, Portugal a cesar_cardoso@civil.uminho.pt,
More informationSupplemental Lighting in High-Wire Cucumber Production on Raised- Troughs
Supplemental Lighting in High-Wire Cucumber Production on Raised- Troughs Xiuming Hao and Athanasios P. Papadopoulos Agriculture and Agri-Food Canada, Greenhouse and Processing Crops Research Centre 2585
More informationEnergy management in protected cropping: The use of screens
Factsheet 08/09 Protected crops Written with funding from Defra (AC0407) Horticultural Development Company Project No. PC 198, 198a, 227, 227a, & Defra HH3611SPC Bradbourne House East Malling Kent ME19
More informationWHY SHOULD YOU CONSIDER INSTALLATION OF ALUMINET SCREENS?
WHY SHOULD YOU CONSIDER INSTALLATION OF ALUMINET SCREENS? Saves energy Aluminet screens have been tested and proved to save over 50% of heating energy, which means direct reduction of your operational
More informationDevelopment of a Greenhouse System for Tropical Lowland in Indonesia
Development of a Greenhouse System for Tropical Lowland in Indonesia Silke Hemming, Dries Waaijenberg and Jouke B. Campen Wageningen UR Agrotechnology & Food Innovations (A&F) P.O. Box 17, 6700 AA Wageningen
More informationAdvanced water and nutrient management towards efficient nutrient use in greenhouse horticulture
Advanced water and nutrient management towards efficient nutrient use in greenhouse horticulture Wim Voogt Wageningen UR Greenhouse Horticulture Osnabrücker Kontaktstudientage nov 21 Contents Greenhouse
More informationGreenhouse Cooling and Heat Recovery using Fine Wire Heat Exchangers in a Closed Pot Plant Greenhouse: Design of an Energy Producing Greenhouse
Greenhouse Cooling and Heat Recovery using Fine Wire Heat Exchangers in a Closed Pot Plant Greenhouse: Design of an Energy Producing Greenhouse J.C. Bakker, H.F. de Zwart and J.B. Campen Plant Research
More informationGREENHOUSE AND HORTICULTURAL TURNKEY PROJECTS
GREENHOUSE AND HORTICULTURAL TURNKEY PROJECTS Rufepa Tecnoagro is a Spanish company, manufacturing Integral and Turnkey Agricultural Projects since more than 25 years. About Rufepa Tecnoagro In Rufepa,
More informationGrowing with Energy Efficiency: Greenhouse Productivity Optimization
Growing with Energy Efficiency: Greenhouse Productivity Optimization 2018 Energy Summit Drew Everett May 30 th, 2018 Agenda Union Gas Overview Who is Union Gas? What is DSM? Greenhouses Ontario s market
More informationLED Lighting. Review of practical experience and results of trials in different cut flower crops
LED Lighting Review of practical experience and results of trials in different cut flower crops Marco de Groot Crop consultant Gerbera and Alstroemeria marco@floriconsultgroup.nl LED developments Gerbera
More informationEfficiencies of flat plate solar collectors at different flow rates
Available online at www.sciencedirect.com Energy Procedia 30 (01 ) 65 7 SHC 01 Efficiencies of flat plate solar collectors at different flow rates Ziqian Chen*, a Simon Furbo, Bengt Perers, Jianhua Fan,
More informationChapter 4 and 5 Wear Mechanisms
Chapter 4 and 5 Wear Mechanisms 1 Delamination Wear Mechanisms Four mechanisms of delamination wear 1. Plastic deformation of the surface 2. Crack nucleation at the sub-surface due to plastic deformation
More informationThe object of this experiment is to test the de Broglie relationship for matter waves,
Experiment #58 Electron Diffraction References Most first year texts discuss optical diffraction from gratings, Bragg s law for x-rays and electrons and the de Broglie relation. There are many appropriate
More informationA Concept for Reduced Energy Demand of Greenhouses: the Next Generation Greenhouse Cultivation in the Netherlands
A Concept for Reduced Energy Demand of Greenhouses: the Next Generation Greenhouse Cultivation in the Netherlands A. de Gelder, E.H. Poot, J.A. Dieleman and H.F. de Zwart Wageningen UR Greenhouse Horticulture
More informationAn Enlightened View on Protected Cultivation of Shade-Tolerant Pot- Plants: Benefits of Higher Light Levels
An Enlightened View on Protected Cultivation of Shade-Tolerant Pot- Plants: Benefits of Higher Light Levels J. Kromdijk, F. van Noort, S. Driever and T. Dueck Wageningen UR Greenhouse Horticulture, Radix
More informationWinter College on Optics and Energy February Anti-reflection and light-trapping. D. Bagnall Southampton University U.K.
212-7 Winter College on Optics and Energy 8-19 February 2010 Anti-reflection and light-trapping D. Bagnall Southampton University U.K. Anti reflection and light trapping Professor Darren Bagnall Electronics
More informationEvaluation of plastic mulch effects on cucumber and tomato yields at flowering and production stages
Proceedings of The Fourth International Iran & Russia Conference 805 Evaluation of plastic mulch effects on cucumber and tomato yields at flowering and production stages Behzad Ghorbani Assistant Professor
More informationCalculating the effect of external shading on the solar heat gain coefficient of windows Christian Kohler 1, Yash Shukla 2, Rajan Rawal 2
Calculating the effect of external shading on the solar heat gain coefficient of windows Christian Kohler 1, Yash Shukla 2, Rajan Rawal 2 1 Lawrence Berkeley National Laboratory, Berkeley, USA 2 CEPT University,
More informationPlant Breeding for Stress Tolerance Part 1: Consider the Energy Balance
Plant Breeding for Stress Tolerance Part 1: Consider the Energy Balance James L. Heilman and Kevin J. McInnes Dept. of Soil and Crop Sciences High throughput phenotyping is a promising methodology for
More informationUsing structured aluminum reflectors in flux scattering on module performance
Using structured aluminum reflectors in flux scattering on module performance Joseph Simfukwe * 1, Sylvester Hatwaambo 1, Kabumbwe Hansingo 1 1 University of Zambia, Department of Physics, Box 32379, Lusaka,
More informationSustainable greenhouse design
Sustainable greenhouse design S. Hemming and J.C. Bakker Wageningen UR Greenhouse Horticulture, NL silke.hemming@wur.nl and sjaak.bakker@wur.nl Trends in Horticulture Increase of production scale/ intensity
More informationHydroponic Green Farming Initiative (HGFI)
Hydroponic Green Farming Initiative (HGFI) Agricultural Sector in Jordan Irrigated agriculture has important social, economic, and political benefits Irrigated agriculture underpins the JV economy Agricultural
More informationFUTURE FOOD PRODUCTION FOOD FOR THOUGHT
FUTURE FOOD PRODUCTION FOOD FOR THOUGHT Web: Email: www.bomgroup.nl m.vermeij@bomgroup.nl Ing. M.J. Vermeij, Bom Group GFIA Utrecht 9 th May 2017 What do we know? Some individual topics.at high speed.
More informationHigh strain point glass substrate for photovoltaic solar cell
Empowering solar efficiency Module material PV200 High strain point glass substrate for photovoltaic solar cell Much less deformation in the heating process than soda-lime glass. Small variations in thermal
More informationOrigin Organic Farms Inc.
ISO 50001 Energy Management Systems standard compliance Origin Organic Farms Inc. Steady progress toward adopting ISO 50001 CASE STUDY SNAPSHOT Industry: Organic greenhouse farm ISO 50001 Energy Management
More informationLIGHT FARM LED lighting solution in Agriculture Case Review tel:
LIGHT FARM Case Review www.lightfarm.wieson.com ltf.service@wieson.com tel:886-2-26475508 1 About Light Farm. Brand Architecture For 20 years, Wieson Technologies has devoted to mechatronic integration
More information1- EFFECT OF VACCUUM LEVEL, PULSATION RATIO, CLAW SIZE AND USING DUOVAC UNIT ON PERFORMANCE OF MACHINE MILKING OF FRIESIAN COWS The main objectives
1- EFFECT OF VACCUUM LEVEL, PULSATION RATIO, CLAW SIZE AND USING DUOVAC UNIT ON PERFORMANCE OF MACHINE MILKING OF FRIESIAN COWS The main objectives of this study were, to investigate the influence of different
More informationLED Technology in Horticulture Tim Haworth, General Manager CambridgeHOK.
Growing for a sustainable future LED Technology in Horticulture Tim Haworth, General Manager CambridgeHOK. 21 st October 2014. HOK A plant needs light to grow: photosynthesis Light photons are absorbed
More informationThe Solar Greenhouse: State of the Art in Energy Saving and Sustainable Energy Supply
The Solar Greenhouse: State of the Art in Energy Saving and Sustainable Energy Supply G. Bot I, N. van de Braak 1, H. Challa (~)l, S. Hemming l, Th. Rieswijk 2, G. v. Straten 1 and I. Verlodt 3 lwageningen
More informationEffect of Leaf Area on Tomato Yield
Effect of Leaf Area on Tomato Yield E. Heuvelink 1), M.J. Bakker 1), A. Elings 2), R. Kaarsemaker 3) and L.F.M. Marcelis 2) 1) Wageningen University, Horticultural Production Chains group, Marijkeweg 22,
More informationAdvanced Agriculture
Advanced Agriculture What are the benefits? Ultra Efficient Water & Energy Savings Organic, Fresh, Clean & Local Increased Yield in Extreme Conditions What do we do? We use aeroponic technologies We grow
More informationLong-term cover cropping in conventional vegetable systems. Can you improve soil health while still tilling?
YES! We can! Long-term cover cropping in conventional vegetable systems. Can you improve soil health while still tilling? Laura L. Van Eerd School of Environmental Sciences University of Guelph Ridgetown
More informationApplication note. Coated wafer mapping using an Agilent Cary 7000 Universal Measurement Spectrophotometer (UMS) with Solids Autosampler
Coated wafer mapping using an Agilent Cary 7000 Universal Measurement Spectrophotometer (UMS) with Solids Autosampler Application note Materials testing and research Authors Travis Burt, Farinaz Haq Agilent
More informationLabeling Pesticides for vegetable production in Hydroponic Greenhouse :
Labeling Pesticides for vegetable production in Hydroponic Greenhouse : the critical need for IR 4 in USA and PMC in Canada Michael E. Bledsoe, Ph.D. Senior Vice President Food Safety and Regulatory Affairs
More informationAnswer Test Questions Finish Climate Discussion
NREM 301 Forest Ecology & Soils Day 30 December 4, 2008 Answer Test Questions Finish Climate Discussion Take-Home Test Due Dec 11 5 pm No Final Exam Lab Today Finish & e-mail all materials to Dick Class
More informationAlthough electricity is efficient at heating water it is expensive and not available everywhere.
SOLAR WATER HEATING Introduction Hot water is required for many purposes and the sun can be used effectively, efficiently and economically to provide this heat. The warming effect of solar radiation is
More informationDETERMINING THE OPTIMUM ORIENTATION OF A GREENHOUSE ON THE BASIS OF THE TOTAL SOLAR RADIATION AVAILABILITY
THERMAL SCIENCE, Year 2011, Vol. 15, No. 1, pp. 215-221 215 DETERMINING THE OPTIMUM ORIENTATION OF A GREENHOUSE ON THE BASIS OF THE TOTAL SOLAR RADIATION AVAILABILITY by Snežana M. DRAGI]EVI] Technical
More informationThe Effect of Outdoor Climate Conditions on Passive Greenhouse Design
The Effect of Outdoor Climate Conditions on Passive Greenhouse Design Bram Vanthoor 1,2a, Cecilia Stanghellini 1, Eldert van Henten 1,2, Pieter de Visser 1 1 Wageningen-UR Greenhouse Horticulture, P.O.
More informationPoor distribution & glare
Light transmission The benefits of the use of natural daylight in buildings in respect of health & well-being, safety, productivity and energy savings are well documented. LIGHT TRANSMISSION Light that
More informationAdding Value with Horticulture Farming
Adding Value with Horticulture Farming Patrick Byers Regional Horticulture Specialist University of Missouri Extension 417-881-8909 byerspl@missouri.edu Outline Introduction Inventory your resources Determine
More informationIN SITE NET PHOTOSYNTHESIS MEASUREMENT OF A PLANT CANOPY IN A SINGLE-SPAN GREENHOUSE
IN SITE NET PHOTOSYNTHESIS MEASUREMENT OF A PLANT CANOPY IN A SINGLE-SPAN GREENHOUSE ABSTRACT Tadashi Takakura *, Haruki Sunagawa, Maro Tamaki, Takae Usui, Naoki Taniai Okinawa Agricultural Research Center,
More informationGardening with Straw Bales
Gardening with Straw Bales DUSTIN BLAKEY FARM ADVISOR, INYO AND MONO COUNTIES UCCE Today s Topics 1. What is about? 2. Is this for me? 3. Setting up bales 4. Planting techniques 5. Special issues Just
More informationOKAWOOD - Insulating Glass with Wooden Grid
OKAWOOD - Insulating Glass with Wooden Grid OKAWOOD is a successful synthesis between the classical and the modern construction material, between wood and glass. OKAWOOD is made up of a filigree wooden
More informationDevelopment of tools to predict crop yield: the EU SPICY project. Anja Dieleman, Wageningen UR Greenhouse Horticulture
Development of tools to predict crop yield: the EU SPICY project Anja Dieleman, Wageningen UR Greenhouse Horticulture Smart tools for Prediction Improvement of Crop Yield (2008 2012) Aim: Develop tools
More informationThe control head. The water pipelines. The dripper lines. IRRIGATION SCHEDULING Irrigation requirements
Pressurized Irrigation Techniques 15.5 The control head The control head consists of a control plastic shut off valve 1 inch (gate or ball valve), and a 1 inch plastic (PP) line filter, screen or disk
More informationRECENT PROJECTS. We recommend Plantalux Sp. z o.o. as a reliable horticulture LED lamps manufacturer. Greenhouse owner from Eastern Poland
3 plantalux.pl RECENT PROJECTS We have been using horticulture LED COB lamps manufactured by Plantalux Sp. z o.o. for hydroponic lettuce cultivation in greenhouse since December 2017. We are pleased with
More informationOKAWOOD - Insulating Glass with Wooden Grid
OKAWOOD - Insulating Glass with Wooden Grid OKAWOOD is a successful synthesis between the classical and the modern construction material, between wood and glass. OKAWOOD is made up of a filigree wooden
More informationSolar Flat Plate Thermal Collector
Solar Flat Plate Thermal Collector 1 OBJECTIVE: Performance Study of Solar Flat Plate Thermal Collector Operation with Variation in Mass Flow Rate and Level of Radiation INTRODUCTION: Solar water heater
More informationGetting Started in Produce Farming. Outline. Introduction. Introduction. Inventory Your Resources. Introduction
Getting Started in Produce Farming Patrick Byers Regional Horticulture Specialist University of Missouri Extension Outline Introduction Inventory your resources Determine the cropping system Considerations
More information1984/85. Acta Horticulturae, 191, 1986 Solanacea in Mild Winter
POPPER PRODUCTION UNDER A SIMPLE PROTECTING STRUCTURE DUR- ING WINTER SEASON IN THE NORTH OP DELTA, EGYPT P. El-Aidy Faculty of Agriculture Kafr El-Sheikh, Egypt Abstract The favourable climatic conditions
More informationSOLAR PHOTOVOLTAICS Part 1
SOLAR PHOTOVOLTAICS Part 1 Solar Energy Contents Irradiance, Solar Constant Solar Window & tilt effects Atmospheric effects, air mass Solar spectrum, sensitivity of PV materials to various wavelengths
More information2007 PLACE Conference September 16-20 St Louis, MO Nano-Composite Polymer Optical Coatings Vampire Optical Coatings, Inc. Tom Faris vcoat@copper.net Introduction What is a nano-composite polymer coating?
More informationHorticulture Product Guide. Premium Greenhouse and High Tunnel Solutions from the Leader in Horticulture Polyethylene Film Products.
Horticulture Product Guide Premium Greenhouse and High Tunnel Solutions from the Leader in Horticulture Polyethylene Film Products. A History of Advanced Technology Advanced Technology The AT in AT Films
More informationConventional Paper-II-2012
Conventional Paper-II-2012 1.a. Determine the maximum and minimum transmission angle of the mechanism shown which is driven by member O. 1 B 3cm s 4cm p l 8cm b. For a cam whose acceleration is constant
More informationSvensson Cloth. Table of Contents. Type Purpose Pg. SLS 10 ULTRA PLUS Energy savings, air humidity control 2. XLS Energy savings, solar reflection 2
Svensson Cloth Table of Contents Purpose Pg. SLS 10 ULTRA PLUS Energy savings, air humidity control 2 XLS Energy savings, solar reflection 2 XLS F Solar reflection 3 XLS REVOLUX Fire security, energy savings,
More informationDesign of a NIR-Concentrator System Integrated in a Greenhouse
Design of a NIR-Concentrator System Integrated in a Greenhouse P.J. Sonneveld, G.L.A.M. Swinkels, B.A.J. van Tuijl and H. Janssen Wageningen UR Greenhouse Horticulture Wageningen The Netherlands Keywords:
More informationWhat can we grow in greenhouse?
What can we grow in greenhouse? Here are the plants that I recommend grow best inside a greenhouse: 1. Ginseng Ginseng is a great crop to grow around your homestead. Not only for its medicinal properties,
More information02.1 Soil preparation Solarization Sterilization 7
Agriculture 01. Company 4 02. Agriculture 6 02.1 Soil preparation 7 02.1.1 Solarization 7 02.1.2 Sterilization 7 02.2 Mulch 8 02.2.1 Heating 8 02.2.2 Photoselective 8 02.2.3 Covering 9 02.2.4 Special film
More informationGreenhouses covering materials: a comparative study
48 March, 2016 AgricEngInt: CIGR Journal Open access at http://www.cigrjournal.org Vol. 18, No. 1 Greenhouses covering materials: a comparative study Moustafa A. Fadel *, Bani Hammad, Al Hosany Faisal,
More informationWhen the Great Outdoors Just Isn t Quite Enough. Our Time Today 7/6/2017 WHAT CAN A HOME GREENHOUSE DO FOR YOU?
When the Great Outdoors Just Isn t Quite Enough Dr. Natalie Bumgarner UT Residential and Consumer Horticulture Specialist/ TEMG Coordinator IMGC 7.12.17 Our Time Today A little Q and A to begin What can
More informationNeodymium Doped Yttrium Orthovanadate (Nd:YVO4)
Neodymium Doped Yttrium Orthovanadate (Nd:YVO4) Nd:YVO4 is the most efficient laser host crystal for diode pumping among the current commercial laser crystals, especially, for low to middle power density.
More informationMedium temperature solar thermal collector with an internally integrated CPC
Ahmad Mojiri Medium temperature solar thermal collector with an internally integrated CPC Ahmad Mojiri, Cameron Stanley, David Rodriguez-Sanchez and Gary Rosengarten RMIT University, 115 Queensberry St.,
More informationPEACE OF MIND PLASTICULTURE. RELIABILITYStrength PLASTICULTURE
PLASTICULTURE PEACE OF MIND RELIABILITYStrength Grow with Gundle API for a secure future Gundle Products offer free on site service to ensure compliance with the specification in all aspects to achieve
More informationGenesis of Friction between Macroscale contacts. Reference: Chapter 3 of the text books
Genesis of Friction between Macroscale contacts Reference: Chapter 3 of the text books What is friction? F = W s µ varies as a function of the sliding distance. 1 0.6 0.2 0 0 20 40 60 80 Di stan ce slid
More information