Extensive research has been conducted to develop fertilizer recommendations for crops grown in South Dakota. To calculate nitrogen (N) fertilizer rates the equation uses the factors yield potential, lbs N/bu of crop multiplier, preplant soil test N to a depth of 0 to 24 in., previous crop, manure application, and tillage type. To calculate phosphorus (P) and potassium (K) rates the equation uses the factors of soil test P (Olsen-P or Bray-1 P extraction tests) or soil test K (ammonium acetate extraction test) at a depth of 0 to 6 in. and yield potential. To calculate sulfur (S) fertilizer rates, the equation uses the factors of soil test S to a depth of 0 to 24 in. soil texture category and tillage type. This workbook has been developed to aid in the ease of calculating fertilizer rates (N, P, K, and S) for corn, soybean, and wheat. Future updates of this workbook will work to include other crops grown in South Dakota.
South Dakota Fertilizer Rate Guidelines Calculator for Corn, Soybean, and Wheat
Women on the Range
SDSU Extension invites women in agriculture to attend a Women on the Range Workshop on June 8 and 9 at The Branding Iron restaurant (19079 US-85, Belle Fourche, SD 57717).
Environmental Training for CAFOs - June
SDSU Extension will host an environmental training session for operators of Concentrated Animal Feeding Operations (CAFOs) on June 28 at the Crossroads Convention Center in Huron (100 Fourth St. S.W. in Huron, 57350).
Monitoring Corn Nutrient Deficiencies: The Traditional and Precision Ag Approach
To maximize growth and productivity, plants require 17 different nutrients.