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Raymond C. Ward Ward Laboratories Inc Ward Laboratories, Inc - - PowerPoint PPT Presentation
Raymond C. Ward Ward Laboratories Inc Ward Laboratories, Inc - - PowerPoint PPT Presentation
Raymond C. Ward Ward Laboratories Inc Ward Laboratories, Inc Kearney, NE www.wardlab.com Soil Sample for Fertility Soil Sample for Fertility Uniform Slice Uniform Slice Top and Subsoil Sampling Top and Subsoil Sampling Clean Buckets and
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Uniform Slice Uniform Slice
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Top and Subsoil Sampling Top and Subsoil Sampling
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Clean Buckets and Sample Bags Clean Buckets and Sample Bags
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Grid Sampling Grid Sampling
- New technology using GPS etc
New technology using GPS, etc
- Point sampling usually every 2.5 acre
i bili i hi h fi ld
- Measures variability within the field
- Variable rate apply phosphate, potash, zinc
and lime
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Grid Sampling Grid Sampling
1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 25 26 27 28 29 30 31 32
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Fertilizer Recommendations Fertilizer Recommendations
- Crop and Yield Goal
Crop and Yield Goal
- Past Crop
S il l
- Soil Test Values
- Then You Receive a Suggested Nutrient Rate
- You have to decide what method of
application pp
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There is More Than N P K There is More Than N P K
- Major Nutrients
Major Nutrients
– N, P, and K
- Secondary Nutrients
- Secondary Nutrients
– Calcium, Magnesium, and Sulfur
- Micro‐Nutrients
– Zinc, Iron, Manganese, Copper, and Nickel – Boron, Chloride, and Molybdenum
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Nutrient Crop Removal, lbs/Bu CORN CORN
Nutrient lb/bu 200 bu/A Nitrogen N 0 75 150 Nitrogen, N 0.75 150 Phosphorus, P2O5 0.33 66 Potassium K2O 0 23 46 Potassium, K2O 0.23 46 Sulfur, S 0.09 18 Zinc Zn 0 001 0 2 Zinc, Zn 0.001 0.2
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Nutrient Crop Removal, lbs/Bu CORN CORN
Nutrient lb/bu 200 bu/A Nutrient lb/bu 200 bu/A Chloride 0.024 4.8 Manganese 0 0006 0 12 Manganese 0.0006 0.12 Iron 0.0012 0.24 Copper 0 0004 0 08 Copper 0.0004 0.08 Boron 0.0006 0.12 Molybdenum 0 00001 0 002 Molybdenum 0.00001 0.002
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Nutrient Content of Corn Residue
Nutrient lbs per ton Nitrogen, N 18 Nitrogen, N 18 Phosphorus, P2O5 4 Potassium K2O 30 Potassium, K2O 30 Sulfur, S 3
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Crop Nutrient Removal, lbs/bu SOYBEAN SOYBEAN
Nutrient lb/bu 60 bu/A Nitrogen, N 3.6 216 Nitrogen, N 3.6 216 Phosphorus, P2O5 0.77 46 Potassium, K2O 1.2 72 Potassium, K2O 1.2 72 Sulfur, S 0.18 11 Zinc, Zn 0.003 0.18 Zinc, Zn 0.003 0.18
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Crop Nutrient Removal, lbs/bu SOYBEAN SOYBEAN
Nutrient lb/bu 60 bu/A Chloride 0.016 1.0 Iron 0.005 0.3 Manganese 0.002 0.12 Copper 0.001 0.06 Boron 0.0006 0.04 Molybdenum 0.00001 0.0006
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Nutrient Content of Soybean Stubble Nutrient lbs per ton Nitrogen N 15 Nitrogen, N 15 Phosphorus, P2O5 2.4 P i K2O 12 Potassium, K2O 12 Sulfur, S 5
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Nutrient Crop Removal, lbs/Bu WHEAT WHEAT
Nutrient lb/bu 60 bu/A Nitrogen, N 1.2 72 Phosphorus, P2O5 0.52 31 Potassium, K2O 0.26 16 Sulfur, S 0.12 7 Zinc, Zn 0.003 0.18
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Nutrient Crop Removal, lbs/Bu WHEAT WHEAT
Nutrient lb/bu 60 bu/A Chloride 0.07 4.2 Chloride 0.07 4.2 Manganese 0.002 0.12 Copper 0.0007 0.04 Copper 0.0007 0.04 Boron 0.001 0.06 Molybdenum 0.0004 0.02 Molybdenum 0.0004 0.02 Zinc, Zn 0.002 0.12
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Nutrient Content of Wheat Straw
N i lb Nutrient lbs per ton Nitrogen, N 12 Phosphorus, P2O5 2.3 Potassium, K2O 29 , Sulfur, S 4
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Soil Testing Soil Testing
- Measure Nutrient Supply
Measure Nutrient Supply
- Determine Amount of Nutrient to Apply
B d il t t l – Based on soil test value – Based on crop and yield goal – Based on crop removal
- Track Soil Test Changes Over Time