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West Kentucky | If you throw all the VR and guidance equipment away how are you then going to vr by yield history. A straight rate of fertilizer is not a very good management plan for almost all corn acres here and most everywhere else. Wheat and soybeans might lend themselves to a straight rate a little better though. Here, if we fertilized by scales only, we would be fertilizing all ground like it makes 175-185 bushel. Where a much better management plan is to fertilize the low yield ground as such and the high yielding ground as such which here can typically range from 120-260 bpa on a normal year. We tried the grid sample and build soils technique for nearly 10 years on some ground and saw no real difference other than spending a lot of extra money. Soil samples are a tool. While I agree that there is a lot of chance in pulling them, in general they do a good job of showing trends. We no longer grid sample though, we do pull samples by yield zones so we are kind of doing what you said. | |
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How deep and how often to soil test?
