Introduction. Fertiliser. Lime. Slurry and Manure

Transcription

1 Crop Inputs

2 Introduction Crop inputs such as fertilisers, organic manures, lime and sprays all have a quantifiable value on farm. This section provides information that many of the crop and grassland gross margins and cost of production data refer to and include. Fertiliser Fertiliser levels used in the enterprise data are intended only as a guide for budgeting purposes and should not be regarded as a recommendation. In practice, many factors affect the level of N, P 2 O 5 and K 2 O required by a specific crop, including previous cropping policy, the quantity of organic manures being used and soil nutrient status. N levels will also require adjustment for Nitrate Vulnerable Zone (NVZ) Action Programme regulations. Fertiliser prices used are based on typical prices paid in summer Fertiliser costs used in the gross margins are shown in the table below. Fertiliser Price Nutrient Cost Nitrogen (Ammonium Nitrate) /t 0.54/kg N Phosphate (Triple Super Phosphate) /t 0.61/kg P2O5 Potassium (Muriate of Potash) /t 0.45/kg K2O All gross margins assume nutrients are derived from purchased fertiliser. Nutrient inputs for crops should be adjusted to account for organic nutrients which will reduce costs accordingly. Lime No charge for share of lime is included in the variable costs of arable, grassland and forage crops. Costs for lime will vary significantly depending on type (e.g. calcium, magnesium), distance from source, type of haulage (artic or 8 wheeler) and spreading contractor s charges. An appropriate annual maintenance charge (including delivery and application) to be included in individual margins could be calculated to suit specific farm practice using the example below: Cost Rate Frequency of application Annual charge 30/t 3.7t/ha 4 years 27.75/ha Slurry and Manure Use of slurries or manures has not been considered in the enterprise data but they are a valuable source of major nutrients (N, P 2 O 5 and K 2 O), secondary nutrients, trace elements and organic matter. CROP INPUTS 4

3 When planning inorganic fertiliser applications for crops and grassland, the total crop requirement should be adjusted to account for any use of slurries and manures. The table overleaf is an estimated value based on the total nutrients present in the stored slurry and manure prior to application to land. Manure Type DM (%) Total plant nutrient Cattle FYM (Fresh) kg/t or kg/m 3 /kg Total value ( /t or /m3) 25 N P 2 O K 2 O Cattle Slurry 6 N P 2 O K 2 O Sheep FYM 25 N (Fresh) P 2 O K 2 O Pig FYM 25 N (Fresh) P 2 O K 2 O Pig Slurry 4 N P 2 O K 2 O Layer manure 35 N P 2 O K 2 O Broiler/turkey litter 60 N P 2 O K 2 O Nitrogen availability to crops will be significantly altered by the timing and method of application, and other factors including temperature, rainfall and crop growth stage and health, therefore the financial values above will be depleted. For further guidance on the use of organic manures, refer to SRUC Technical Note CROP INPUTS

4 Nutrient Planning Using the information below, total quantities of slurries and manures produced on farm can be calculated. Typical volume of Livestock excreta produced m 3 /day m 3 /wk Dairy Cow (annual milk yield > 9,000l) Dairy Cow (annual milk yield 6,000-9,000l) Dairy Cow (annual milk yield < 6,000l) Dairy Heifer (13 months to first calf) Dairy Heifer (3 to 13 months) Beef Cow (> 500kg) Beef Cow ( 500kg) Steer/heifer (over 25 months) Steer/heifer (13 to 25 months) Cattle (3 to 13 months) Bull beef (over 3 months) Calf (up to 3 months) Sow (130 to 225kg) & litter Maiden Gilt (90 to130kg) Breeding Boar (66 to 150kg) Breeding Boar (over 150kg) Weaner (7 to 31kg) Grower (31 to 66kg) - dry fed/liquid fed 0.004/ /0.05 Finisher (66kg to slaughter) - dry fed/ liquid fed 0.006/ /0.07 Ewe (> 60kg) Ewe ( 60kg) Lambs (6 months to tupping) Goat Breeding deer Other deer Horse Laying Hens (per 1000, up to 17 wks) Laying Hens (per 1000 caged, > 17 wks) Laying Hens (per 1000 free range, > 17 wks) Broilers (table, per 1000) Broiler (breeders, per 1000, up to 25 wks) Broiler (breeders, per 1000, > 25 wks) Turkeys (per 1000, male) Turkeys (per 1000, female) Ducks (per 1000) CROP INPUTS 6

5 When calculating quantities of slurries and manures as part of a farm waste management plan, adjustments for livestock numbers, housing periods and collection of contaminated water and bedding (e.g. straw and sawdust) will be required. For further information on nutrient planning refer to Nitrate Vulnerable Zones guidance and SRUC Technical Notes 623, 633, 649, 650, 651, 652, 655, and 668 or Nutrient Management Guide (RB209). For more information on NVZ s across the UK, see: Scotland - England - Wales - tes-directive/?lang=en Northern Ireland - Planet Scotland PLANET Scotland is a software system designed to help farmers improve their financial and environmental performance through better use of organic and bagged fertilisers. It has been specially developed to take Scottish soils, cropping and growing conditions into account. The practical approach to nutrient management aims to let farmers achieve real win: win results and, with the increasing focus on reducing emissions that contribute to climate change, could also help farms reduce their carbon footprint and so benefit both the business and the wider environment. PLANET stands for Planning Land Application of Nutrients for Efficiency and the Environment and this outlines the approach that the software takes. Farmers and growers in NVZs will already be familiar with this planning approach and PLANET Scotland will allow NVZ farmers to use information produced by PLANET as part of their NVZ record keeping as well as benefiting from all of PLANET s other features. It will also integrate with standard desktop agronomy packages and therefore will only require key data to be entered once. In addition to fertiliser application, the software will also help with farm gate nutrient balances and with planning slurry storage requirements. The software is available free of charge to all Scottish farmers and growers and to their consultants. There is a programme of workshops, on-line and PC-based training packages including video material, a helpline for IT and technical enquiries, and a dedicated website available to help users. To find out more, see 7 CROP INPUTS

6 Residual Values of Fertilisers, Manures and Lime Many fertilisers and manures have a residual value that needs to be calculated as part of a farm valuation or when a farm transfers between owners or tenants. Estimates of the residual value of manures can be obtained by a feeding stuff calculation or by calculation of nutrients in manure (FYM) or slurry. The following valuations are based on information taken from SRUC Technical Notes on fertilisers as noted on page 7. Valuers must show discretion in the values used and to vary the values used according to the standard of husbandry, previous cropping, the state of drainage and the effectiveness of crop protection. Values are given in respect to growing seasons, not calendar years. Compensation for manures using the residual values of feeding stuffs Residues of feeding stuffs fed to livestock will be recovered in manures or slurries thus giving these organic manures a specific value. The values of nutrients in purchased feeds or feeds produced on the farm which are retained in farmyard manures or slurries can be calculated using the figures in the following table. Feeding stuff Average % in feeding stuff N P 2 O 5 K 2 O Compensation value ( ) per tonne of food consumed Before 1 growing season After 1 growing season Soya bean meal or cake Rapeseed meal or cake Beans Peas Fish meal Wheat Barley Oats Maize Bran & other offals of wheat Maize gluten 60% Brewers & distillers' grain (wet) Brewers and distillers' grain (dried) Hay CROP INPUTS 8

7 Feeding stuff Average % in feeding stuff N P 2 O 5 K 2 O Compensation value ( ) per tonne of food consumed Before 1 growing season After 1 growing season Dried grass Grass silage Wheat straw Barley straw Oat straw Straw treated with ammonia Swedes Turnips Potatoes Dried sugar beet pulp (molasses) Pot ale syrup Molasses (sugar cane) Compound cakes & meals for each 1% crude protein Feed additives containing urea for each 1% crude protein For further feeding stuffs see PLANET ( The calculation of nutrients in FYM or slurry from feeding stuffs depends on the following principles: a) The proportions of nutrients present in FYM and slurry will under ideal conditions be 35% for N, 45% for P 2 O 5 and 75% K 2 O. b) Where storage conditions are sub-optimal then these percentages should be reduced by up to half. c) For slurry the percentage given in a) for N should only be used for spring or summer application. For autumn and winter application the allowances should be reduced by 2/3 and 1/3 respectively. An example calculation for the value of FYM taken from the nutrients from a feeding stuff is shown in the following table: 9 CROP INPUTS

8 e.g. residual value of one tonne of barley fed to livestock. Plant Nutrient kg/t /kg Total /t Value of FYM ( /t) Before 1 After 1 growing growing season season N P 2 O K 2 O In calculating the value of manures, instances occur where records of the feeds fed to livestock are not available. In this case the value of stored farmyard manure or slurry can be estimated on the basis of the average nutrient content as shown in the following tables whilst also considering, in the case of slurry, the season of application. Residual value of fertilisers and manures The current value of the major plant nutrients, the principal forms used in agriculture and estimates of the proportions for which compensation in appropriate are detailed in the following table: Proportion of applied plant nutrients available for crop use after (growing season) Source N (a) Inorganic fertilisers, dried blood, dried poultry manure and liquid digested sludge nil nil nil (b) Other organic manures 1/5 1/10 nil P 2 O 5 All fertilisers and manures 1/2 1/4 1/8 K 2 O All fertilisers and manures nil nil nil Storage and application principals, as per those stated in the previous section, will affect the value of manures. In the following examples, the proportion of nutrients available in the three growing seasons following application as a compound fertiliser (for example 20:10:10), fresh cattle FYM and cattle slurry, are valued. % CROP INPUTS 10

9 e.g. application of 1 tonne of 20:10:10 compound fertiliser. Plant Nutrient kg/t /kg Total /t Value of fertiliser ( /t) after (growing season) N nil nil nil P 2 O K 2 O nil nil nil e.g. application of 1 tonne of fresh cattle FYM. Plant Nutrient kg/t /kg Total /t Value of organic manure ( /t) after (growing season) N nil P 2 O K 2 O nil nil nil e.g. application of 1 tonne of fresh cattle slurry. Plant Nutrient kg/m 3 /kg Total /t * after (growing season) N nil P 2 O K 2 O nil nil nil * N adjustment for winter application timing. Value of organic manure ( /t) Residual value of lime The loss of lime from soils varies over time and for specific field circumstances (e.g. soil type, annual rainfall, high use of nitrogen) however, the average rate of loss from the soil is equivalent to about 0.35 tonnes of calcium oxide (CaO) per hectare per annum. Considering this, there is a residual value for lime applications which may be useful when valuing farm assets in a farm valuation or a farm transfer between owners or tenants. Compensation for lime residues should be based on the neutralising value (NV) of the lime applied, normally reduced by 0.35 tonnes of calcium oxide per hectare or by one-seventh, whichever is the greater for each growing season since the time of application. Compensation for lime should be calculated on the basis of the current price (delivered and spread) for the residual quantity. 11 CROP INPUTS

10 An appropriate calculation of residual quantity of liming materials is set out in the following table: Quantity CaO Annual loss Residual quantity of CaO applied equiv. of CaO equivalent (t/ha) (NV %) applied equivalent after (growing season) t/ha t/ha t/ha (50%) / 7 (0.50) nil 4.4 (46%) nil nil Pesticide Use For each of the arable and forage gross margins, pesticides (including herbicides, insecticides, fungicides, nematicides, adjuvants and plant growth regulators where applicable) are included as appropriate for each crop. Chemical product prices used are only an indication of industry prices and do not account for volume/group discounts and regional variances. Read the label before you buy, and use pesticides safely. Care must be taken to choose a brand of a pesticide product which has been authorised for use on the crop it is intended to spray. Not all brands of a particular pesticide are authorised for the same uses or similar crops e.g. winter wheat and spring wheat. A full list of pesticides can be found in The UK Pesticide Guide 2017 and on The use of pesticides is controlled under the Food and Environment Protection Act 1985, and subsequent Regulations. Anyone who uses a pesticide must take reasonable precautions to protect human health or the environment. Anyone with the need to use a professional pesticide product in the course of their business or employment may not use that pesticide or give instruction to others on the use of that pesticide unless they have received adequate instruction, training and guidance in the correct use of that pesticide. They must hold a Chemicals Regulation Directorate (CRD) recognised Certificate of Competence unless they are working under the direct supervision of someone who holds a certificate (i.e. they are being trained). Those previously operating under grandfathers rights (i.e. born before 31 December 1964) must, since 26th November 2015 also have a Certificate of Competence. Everyone who purchases a professional pesticide product must ensure that the intended user holds a Certificate of Competence. Those who hold a Certificate of Competence approved by the CRD for the safe application of pesticides can join the National Register of Spray CROP INPUTS 12

11 Operators (NRoSO). The scheme ensures that operators participate in ongoing continuous professional development (CPD). UK quality assurance schemes such as Scottish Quality Cereals generally require that the NRoSO membership number of the operator making spray applications to quality assured crops is recorded for each spray application. Currently, the recognised Certificate of Competence for the use of pesticides are issued by the National Proficiency Tests Council (Tel: ) and the Scottish Skills Testing Service (Tel: ). Off-label use Use of any chemical in accordance with an Extension of Authorisation for Minor Use (EAMU) is entirely at growers risk, and growers must obtain and read the appropriate document for that particular authorisation and the general Guidance Notes on off-label uses before using it (available at Pesticide product authorisations may be reviewed, amended, suspended or revoked at anytime. Pesticides no longer authorised A number of pesticides have been withdrawn from use. It is an offence to use a pesticide no longer authorised. To check if a pesticide product is still authorised, take a note of the MAPP number from the label, then go to to check the authorisation status of that product. 13 CROP INPUTS

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