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Revised Soil Fertility Recommendations for Corn

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Fertilizer recommendations for corn were published about 40 years ago and have changed little since then. However, during the past 40 years, yield expectations have at least doubled from about 80 to more than 200 bushels per acre in many fields. Tillage practices and the hybrids planted also have changed. The changes from previous corn fertility recommendations are primarily the result of recent assessments of corn yield responses to nitrogen through field experiments using modern hybrids and conditions.

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