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By Tom Woods
As we deal with nutrient management laws and high nitrogen prices, we sometimes lose track of just why we really use fertilizers to produce crops.
We know we need them because the soil sample results tell us to apply them. We know adequate fertility leads to improved yields, but why? We have spent so much time looking at the negative aspects of fertilizer that I thought it might be enjoyable to look at why a nutrient like potassium is needed by plants.
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