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 Sample Bags Clean Buckets and Sample Bags

Grid Sampling Grid Sampling • New technology using GPS etc New technology using GPS, etc • Point sampling usually every 2.5 acre • Measures variability within the field i bili i hi h fi ld • Variable rate apply phosphate, potash, zinc and lime

Grid Sampling Grid Sampling 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 10 11 11 12 12 13 13 14 14 15 15 16 16 17 17 18 18 19 19 20 20 21 21 22 22 23 23 24 24 25 25 26 26 27 27 28 28 29 29 30 30 31 31 32 32

Fertilizer Recommendations Fertilizer Recommendations • Crop and Yield Goal Crop and Yield Goal • Past Crop • Soil Test Values S il l • Then You Receive a Suggested Nutrient Rate • You have to decide what method of application pp

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

Nutrient Crop Removal, lbs/Bu CORN CORN Nutrient lb/bu 200 bu/A Nitrogen Nitrogen, N N 0 75 0.75 150 150 Phosphorus, P2O5 0.33 66 Potassium, K2O Potassium K2O 0 23 0.23 46 46 Sulfur, S 0.09 18 Zinc Zn Zinc, Zn 0 001 0.001 0 2 0.2

Nutrient Crop Removal, lbs/Bu CORN CORN Nutrient Nutrient lb/bu lb/bu 200 bu/A 200 bu/A Chloride 0.024 4.8 Manganese Manganese 0.0006 0 0006 0.12 0 12 Iron 0.0012 0.24 Copper Copper 0.0004 0 0004 0.08 0 08 Boron 0.0006 0.12 Molybdenum Molybdenum 0.00001 0 00001 0 002 0.002

Nutrient Content of Corn Residue Nutrient lbs per ton Nitrogen, N Nitrogen, N 18 18 Phosphorus, P2O5 4 Potassium K2O Potassium, K2O 30 30 Sulfur, S 3

Crop Nutrient Removal, lbs/bu SOYBEAN SOYBEAN Nutrient lb/bu 60 bu/A Nitrogen, N Nitrogen, N 3.6 3.6 216 216 Phosphorus, P2O5 0.77 46 Potassium, K2O Potassium, K2O 1.2 1.2 72 72 Sulfur, S 0.18 11 Zinc, Zn Zinc, Zn 0.003 0.003 0.18 0.18

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

Nutrient Content of Soybean Stubble Nutrient lbs per ton Nitrogen N Nitrogen, N 15 15 Phosphorus, P2O5 2.4 P Potassium, K2O i K2O 12 12 Sulfur, S 5

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

Nutrient Crop Removal, lbs/Bu WHEAT WHEAT Nutrient lb/bu 60 bu/A Chloride Chloride 0.07 0.07 4.2 4.2 Manganese 0.002 0.12 Copper Copper 0.0007 0.0007 0.04 0.04 Boron 0.001 0.06 Molybdenum Molybdenum 0.0004 0.0004 0.02 0.02 Zinc, Zn 0.002 0.12

Nutrient Content of Wheat Straw N Nutrient i lb lbs per ton Nitrogen, N 12 Phosphorus, P2O5 2.3 Potassium, K2O , 29 Sulfur, S 4

Soil Testing Soil Testing • Measure Nutrient Supply Measure Nutrient Supply • Determine Amount of Nutrient to Apply – Based on soil test value B d il t t l – Based on crop and yield goal – Based on crop removal • Track Soil Test Changes Over Time – Are you increasing or decreasing nutrient levels?