While later cover crop termination in the spring can allow for more biomass accumulation, such later termination can change the C-to-N composition of the plants impacting residue decomposition. Therefore, identifying the best time for cover crop termination to provide optimal N cycling benefits can help farmers make decisions about cover crop management.

The carbon-to-nitrogen ratio is a critical number to know when planning for both cover crops and cash crops, according to Pennsylvania cover crop expert Steve Groff. The C:N ratio affects decomposition rates for crop residues and impacts nitrogen cycling as well. (Courtesy of Cover Crop Innovators)

The carbon-to-nitrogen ratio is a critical number to know when planning for both cover crops and cash crops, according to Pennsylvania cover crop expert Steve Groff. The C:N ratio affects decomposition rates for crop residues and impacts nitrogen cycling as well. Understanding the C:N ratio helps growers be better managers in the context of overall soil health and fertilizer use. Groff shares why this often-overlooked aspect is critical to making good decisions when growing covers.