Establish a benchmark by getting your soil sampled. Knowing your fields nutrient levels helps us and you push your crop to the highest possible yields. We use GPS to mark our sample locations the results are more accurate year after year. We also have a soil scan machine to test nitrate levels accurately within minutes. This works well with manure applications because we can wait for the nutrients from the manure to show up before applying nitrogen. This ensures that everything you put on your field gets used in a profitable way.