Yield Response of Corn to Varying Nitrogen Rates.

Nitrogen recommendations for corn grown in clayey soils in Arkansas are significantly higher than those for corn grown in silt loams to compensate for more prevalent diffusion constraints and greater microbial immobilization. Therefore, any effort to increase fertilizer use efficiency is important to ensure the economic and agronomic sustainability of corn production in Arkansas. The objective of this presentation is to discuss results from several fertility studies to assess the yield response of corn, grown in clayey-textured soils, to N rate, plant density and crop rotation.