To explain how to take good soil samples, Iowa State University Extension and Outreach has released a new publication, "Take a Good Soil Sample to Help Make Good Fertilization Decisions."
Based on current research results from Iowa and neighboring states, the Using Manure Nutrients for Crop Production was recently updated to reflect new manure nutrient availability ranges for crop production.
With unfavorable crop fertilizer prices, farmers are considering reducing fertilization rates across all crops despite field conditions. However, making rational or sound management decisions should begin by testing soil, following the recommended application rates for additional nutrients.
Advances in soil-testing research has led Iowa State University Extension agronomists to revise recommendations for phosphorus, potassium and lime.