A discussion in the Organic Grain Resource and Information Network (OGRAIN) email group started with a question about interseeeding clover into soybeans. Several no-tillers proceeded to discuss the topic and how timing of planting could dramatically affect the outcome.

Matt Grosshans turned to the Upper Big Blue Natural Resources District (NRD) and the NRCS for help with funding and planting cover crops. He planted 350 acres of rye after corn and soybeans in fall 2021. 

Nitrate leaching is a major concern in coarse-textured agricultural soils because it can cause economic losses for farmers and contaminate groundwater. While some nitrate leaching may be inevitable when growing corn on sandy soils, there are several management strategies that can be implemented to limit nitrate loss. Here are some key takeaways from a recent five-year study looking at three major factors impacting nitrate leaching: drainage, nitrogen availability, and cropping system.

A fall-planted cereal rye, wheat, or triticale cover crop can have both positive and negative impacts, for example by tying up nitrogen, reducing soil moisture prior to planting, increasing insect pressure, reducing weed pressure, reducing soil erosion and allelopathy. These tips from the University of Nebraska will share tradeoffs to help you better assess cover crop termination timing for your operation and risk level. 

Cover crops are used to address multiple resource concerns and can provide a wide range of conservation benefits including reduced soil erosion, scavenged residual soil nitrogen, weed suppression, and supplemental livestock forage. The carbon to nitrogen (C:N) ratio of the cover crop determines the durability of the cover crop residue.