AVAIL / DAP Potatoes 11 Caribou, Maine Preplant DAP application 300lbs/ac Yields: average of two trials

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1 AVAIL / DAP Potatoes 11 Caribou, Maine Preplant DAP application 300lbs/ac Yields: average of two trials Yield cwt / ac Gross / /cwt AVAIL Benefit (Benefit : Cost) GSP - DAP 386 $3,860 DAP + AVAIL (+17.00/ac) 432 $4,320 +$ (26:1)

2 AVAIL Table Potatoes 10 Ukraine Fertilizer: NPK N Means of 4 replications Loam soils Organic Matter: +5% Tonne / Ha AVAIL Advantage No Fertilizer 25.9 NPK 49.3 NPK (w/ AVAIL MAP) T/Ha lsd: 4.9

3 AVAIL for Liquid Potatoes 10 Eastern Idaho, Field Demo Hi-Stakes Ranch (J.A) Russet Burbanks 19 gpa gpa Banded at Planting on May 17 Sampling: 2 rows x 10 digs Soil: silt loam soil Total Yield cwt/ac U.S #1 s > 8 $16.00 /cwt GSP cwt/ac $1, $11.00 /cwt Gross Revenue* $/ac 128 cwt/ac $1,408 $2211 Avail Value $/ac Benefit:Cost GSP + AVAIL (+$18.50/ac.) cwt/ac $2, cwt/ac $1738 $2625 +$ :1 *Assuming $3/cwt for less than 4 oz and $4/cwt for trucking and packing

4 AVAIL for Liquid Potatoes 10 Eastern Idaho, Field Demo Skidmore Ranch (J.A) Russet Burbanks 20 gpa banded at planting on May 12 Sampling: 2 rows x 10 digs Soil: silt loam soil Total Yield cwt / ac U.S #1 s > 8 $16.00 /cwt GSP cwt/ac $2, $11.00 /cwt Gross Revenue* $/ac 174 cwt/ac $1,914 $2653 Avail Advantage $/ac Benefit : Cost GSP + AVAIL (+$18.50/ac) cwt/ac $3, cwt/ac $1,529 $3800 +$1, :1 *Assuming $3/cwt for less than 4 oz and $4/cwt for trucking and packing

5 AVAIL for Liquid Potatoes 10 Eastern Idaho, Field Demo HJ Ranch (J.A) Russet Burbanks 20 gpa banded at planting on May 3 Sampling: 2 rows x 10 digs Soil: silt loam soil Total Yield cwt/ac U.S #1 s > 8 $16.00 /cwt 4-8 $11.00 /cwt Gross Revenue* / ac Avail Advantage $ / ac Benefit/Cost Trial #1 GSP cwt/ac $3, cwt/ac $1,694 $3763 GSP + AVAIL (+$18.50/ac) cwt/ac $3, cwt/ac $1,518 $3536 (-$245.50) Trial #2 GSP cwt/ac $2, cwt/ac $1,023 $1470 GSP + AVAIL (+$18.50/ac) cwt/ac $4, cwt/ac $1,078 $2288 +$ :1 *Assuming $3/cwt for less than 4 oz and $4/cwt for trucking and packing

6 NutriSphere-N & AVAIL for Liquid Potatoes 10 U of I Parma Research Center Urea applied at planting 200 lbs N irrigation incorporated - 80 lbs P 2 O 5 Russet Rangers Reduced Rate Comparison U.S #1 Yield, cwt / ac Gross Return $ / ac GSP $5,323 Avail / N-N Advantage Benefit : Cost Over GSP GSP + AVAIL (+$18.40 / ac) $5,435 +$ :1 GSP + N-N (+$14.00 / ac) $5,600 +$ :1 GSP + AVAIL + N-N 15% Reduced Rate* (+$27.50 / ac) *Nitrogen 170lbs/ac. Phosphate 68lbs/ac $5,426 +$ :1 Prices based on 2010 fresh market potato prices

7 Avail Potatoes 06-07* University of Wisconsin-Madison Dry Phosphate applied at planting 6 trial Sites ph: Soil P Levels: Low to Extremely High Marketable Yield (cwt) Specific Gravity Gross Return / $5.00 cwt Avail Benefit/Acre + / - GSP Phosphate lb/ P Phosphate + Avail $2, P (+$6.50/A) GSP Phosphate h lb/ P Phosphate + Avail $ P (+$13.00/A) * 2 year mean used for data R. Burbank C. Laboski and M. Repking

8 Avail SD Potatoes 08 Winnemucca, Nevada (CP) at Planting = 25gpa Soil ph: 7.6 Yield CWT/Acre Gross Return / Acre Avail Benefit / Acre GSP $4, Avail SD (+$25.00/A.) $4, $ ROI - 12:1

9 Russet Burbank Potatoes Avail 08 University of Idaho Dr. Jeff Stark Three Treatment Average* applied at Mark out w/avail Broadcast Preplant ph: 8.3 Olsen P = 21 ppm Sandy loam soil Yield # 1 / Acre Gross Return / Acre Avail Benefit /A 8.00/CWT (cost tto benefit ratio) GSP 160lbs P/A 207 $1, GSP + Avail** Avail +$10.00/A 251 $2, $ (35:1) All figures in table represent a mean of 3 phosphate treatments 80, 160 and 240lbs/A ** 50% of applied phosphate was treated with AVAIL /MAP as broadcast application at preplant

10 Avail / NSN Potatoes 06 Treasure Valley, Idaho (DC) (D.C.) GSP / Acre Phosphate 190lb Nitrogen 280lb Avail / P 150lb. P per Acre NSN / Urea 147lb. N per Acre Purple Sage Farm U.S. #1 Count (cwt) Gross $5.50 per cwt Grower Standard Practice 335 $ Net Avail / NSN benefit $$ per Acre GSP + Avail and NSN (+ $29.70/Acre) Hop Road Farm 346 $ $30.30 Grower Standard Practice 440 $ GSP + Avail and NSN 511 $ $ (+ $29.70/Acre)

11 Idaho Potato Trial 06 University of Idaho Avail SideDress at Planting 15 GPA W/Avail SD Avail = Increased vigor, less disease, greater yield, and quality!! GSP

12 Avail - Potatoes 07 Russet Burbank University of Idaho* SSP / MAP w/avail - Fall Applied 10/34-0 w/avail SD Spring Applied Soil Total Phosphate: ppm Soil ph: 7.8 % Free Lime: 2% Fall Applied Lbs / P205 (MAP) Spring Applied Lbs / P205 ( ) Total Yield cwts/a Gross Income Per $5.25/cwt Avail Benefit / Acre GSP $2,121 (No Avail) GSP $2,158 (No Avail) GSP + Avail 80 + Avail 80 + Avail 443 $2,326 +$168 + $17.60 / Acre (ROI 9:1) *Dr. Jeff Stark 07

13 Avail - Potatoes 07 Russet Burbank University of Idaho* 10/34-0 w/avail SD Spring Applied Soil Total Phosphate: ppm Soil ph: 7.8 / Free lime: 2% Yield cwt / Ac Check 0/P GSP GSP+Avail Check 80lbs 160lbs 240lbs lbs / Ac P205 ( ) *Dr. Jeff Stark 07

14 SSP w/avail-34 E. Idaho E. Taylor Field units P/ 10gals per acre w//avail OS 10gpa/planting Cost/Acre: : $ w/avail: $41.20 Avail = /A cost Avail OS Benefit: 10cwt/A Avail ROI = $50.00/A lbs/45 sq ft culls 4-10 oz >10 oz # 2's tuber grade SSP 34

15 Potato Yield and Return Responses to Enhanced P Availability University of Idaho Treatment Applied Yield CWT/A Petiole P% Gross Return 1) 2) Control 311a.225d 1456 MAP 60 lb P205/Ac 330ab.253cd 1546 MAP 120 lb P205/Ac 344bc.275bc 1591 MAP + Exp 60 lb P2O5/A 339ab.288ab 1575 MAP + Exp 120 lb P2O5/A 369c.308a ) Avail SSP = + $4.80/ A ** Gross Return/Acre = $ ) Avail SSP = + $9.60/ A = $ **At $5.00/cwt

16 Avail Potatoes 06-07* University of Wisconsin-Madison Dry Phosphate applied at planting 6 trial Sites ph: Soil P Levels: Low to Extremely High Marketable Yield (cwt) Specific Gravity Gross Return / $5.00 cwt Avail Benefit/Acre + / - GSP Phosphate lb/ P Phosphate + P (+$6.50/A) $2, $95.00 GSP Phosphate lb/ P Phosphate + P (+$13.00/A) $ $ * 2 year mean used for data R. Burbank C. Laboski and M. Repking

17 Avail Potatoes University of Wisconsin-Madison Dry Phosphate applied at planting 4ti trial lsites ph: Soil P Levels: Low to Extremely High 2 year mean used for data Frito Lay Variety Marketable Yield Specific Gravity Gross Return / Avail Benefit/Acre (cwt) $5.00 cwt + / - GSP Phosphate lb/ P Phosphate + P (+$6.50/A) $ $55.00 GSP Phosphate lb/ P Phosphate + Avail $ P (+$13.00/A) GSP Phosphate Phosphate +Avail $ P (+$19.50/A) C. Laboski and M. Repking

18 Avail Potatoes University of Wisconsin-Madison Dry Phosphate applied at planting 4 trial Sites ph: Soil P Levels: Low to Extremely High 2 year mean used for data Frito Lay Variety Marketable Yield (cwt) Specific Gravity Gross Return / $5.00 cwt Avail Benefit/Acre + / - GSP Phosphate lb/ P Phosphate + P (+$6.50/A) $ $55.00 GSP Phosphate lb/ P Phosphate + Avail $ P (+$13.00/A) GSP Phosphate Phosphate +Avail $ P (+$19.50/A) C. Laboski and M. Repking

19 Avail Upcharge +$10.00/A MAP -100-F MAP/Avail Russet Burbank Potatoes 06 University of Idaho, SE Idaho Soil ph Preplant Broadcast SSP/MAP Fall / Spring Applications Yield /Acre U.S. # 1 (cwt)** Grower ROI/A (Avail Benefit) +$281 MAP- 200-F $20.00/A MAP/Avail $101 **$6.00/cwt MAP- 100-S $10.00/A MAP/Avail $218 MAP- 200-S $20.00/A MAP/Avail $33

20 Norkotah Summary 05/06 Avail/P Liquid Planter Band Umatilla, Ore. (2 year cumulative) Treatment Field 1 Field 2 Field 3 Field 4 Avail Total Avail >8 oz Avail Net $ GSP Total GSP >8 oz GSP Net $ Avail Benefit/ Acre +$200 +$310 +$156 -$186 Avail up-charge per Acre = +$20.00 Net $ based on $5.50/cwt

21 Russet Burbank Summary Avail/P - Liquid Planter Band Umatilla, Ore. (mean of 4 field trials) 40 32t Tons/ac t Total US 1 > 10 oz 10 Avail GSP Avail up-charge / acre = +$20.00 Avail Benefit US #1** = +$880.00/acre **US#1 $ ton ($5.50/cwt)

22 Avail SD E. Idaho Potatoes 07 Eastern Idaho (J.A.-GSN) Table values: Mean of 2 Trials Trials received pre-plant w/avail ph: 8.1 Soil P Conc. : 18.7ppm Planter Band Application 25g / A U.S. #1 $14.00 cwt U.S. #2 s + $3.00/cwt Grower Gross Income/A. Trial Benefit / Acre GSP: cwt / A 249 cwt / A $ $ $ Avail SD (+$20.00/A) 179 cwt / A $ cwt / A $ $ $318.00

23 Avail SD E. Idaho Potatoes 07 Eastern Idaho (J.A.- MP) Table values: Mean of 2 Trials ph: 8.1 Soil P Conc. 17ppm Planter Band Application 25g /A U.S. #1 $14.00 cwt U.S. #2 s + $3.00/cwt Grower Gross Income/A. Trial Benefit / Acre GSP Bioflora 116 cwt / A $ cwt / A $ $ Avail SD (+$20.00/A) 208 cwt / A $ cwt / A $ $ $904.00

24 Potatoes Russet, Shepardy varieties Lakeside Fertilizer - Brooks, Alberta 07** SSP/Map: 100lb P205/acre Application: Late April - Drilled in at Planting w/seed Soil ph: 7.5 ** In-season report: Impressively larger root mass on both varieties, that will hopefully yield harvest benefits. Harvest report due in October.. SSP/MAP MAP SSP/MAP MAP