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This publication discusses production of winter annual cover crops, their benefits and management. Research has shown several important benefits of planting winter annual cover crops, chief among them erosion control, addition of nitrogen (N) to the soil for use by a subsequent crop, removal of nitrogen from the soil to prevent nutrient loading, buildup of soil organic matter and buildup of residue that acts as a mulch for water conservation or retention.
A new group of cover crops for winter and summer use include mustards, oilseed radishes and turnips. When young, these plants resemble turnip greens, are very succulent and have a low C:N ratio, resulting in rapid decomposition when incorporated into the soil. However, if allowed to mature, bolt and flower, they produce a large amount of biomass in a short period of time and become woody, resulting in slower decomposition than when killed at an immature stage.
This publication provides recommendations for managing essential nutrient concentrations when growing organic tobacco in greenhouses using a float system.
This publication provides recommendations for managing essential nutrient concentrations when growing organic tobacco in the field.
This study examined the impact of termination timing on cereal rye biomass across 4 North Carolina locations for 2 growing seasons. Termination times were 4 weeks before and at soybean planting. Biomass samples were collected to determine if delaying termination significantly impacted the biomass achieved by the cereal rye cover. Cereal rye biomass ranged from 1325.4 lbs/acre to 6006.5 lbs/acre across environments and treatments. Delaying termination (Green) resulted in significantly higher cereal rye biomass for only 3 of 8 environments. The remaining 5 environments saw no significant gain in biomass from delaying termination an additional 4 weeks. These results suggest that terminating cereal rye at soybean planting may not be necessary to maximize biomass in our Southeastern climate.
