the wisconsin soil test recommendation program · the wisconsin soil test recommendation program...
TRANSCRIPT
The Wisconsin Soil Test Recommendation
Program
UWEX Publication A2809:Nutrient Application Guidelines for Field,
Vegetable, and Fruit Crops in Wisconsin
A2809 – “The Bible”
• Incorporates over 80 years of research
• The official recommendations for NRCS 590 NMP
• Supported by UW Soil Science Department
• Two state-run labs• Uses local calibration• Continuously updated• Revised in 2006
Philosophy of the Wisconsin Soil Test
Recommendation Program• Establishes Soil Sampling and
Testing Methods• Interprets Fertilizer and Lime
Needs• Wide Range of Field Crops and
Soils• Uses a Sufficiency Approach
– Index of available nutrients– Degree of sufficiency for specific crops– Provide recommendation to correct– Allows economic and informed
decision
Soil Sampling Method for Single-Rate Nutrient
Application
UW Soil Testing Methods
Soil Groups
MRTN Guidelines for Corn
Soil Test Categories for P and K
P and K Fertilization Guidelines
Sulfur Availability Index● Soil test S● Subsoil S● Precipitation● Organic matter● Manure history
Soil pH Management