Traverse the area in a zig zag pattern to provide a uniform distribution of sam-pling sites. Even if they are too small to fertilize separately, sample parts of a field that differ in appearance of soil or crop, in previous fertilization, manuring or liming sepa-rately. Avoid sampling recent fertilizer bands, dead fur-rows, areas adjacent to gravel roads or where lime, manure, compost or crop residues have been piled. When to Sample Sample each field once every 2 or 3 years. Under these conditions sample yearly.
Analysis takes time.
Ideally, take soil samples the previous fall from fields to be fertilized for spring planting. You may also take soil samples in summer. Sample Boxes and Information Sheets Management practices that affect a soil test recommenda-tion are manure application, legume sod plowed down, and the crop to be fertilized. This information is essential for a reliable fertilizer recommendation. Be certain that the service you use is accredited.