![]() ![]() This lack of relationship may be because other factors such as water and nitrogen stresses around flowering and grain filling periods. Therefore, in this work we used a high-resolution, multi-year, multi-variable dataset coupled with systems modeling to deeper understand rye effects.Įxperimental, literature, and modeling data indicated that rye biomass at termination date is not a good predictor of cover crop effects on corn yields (Fig. 1) it is hard to determine the effect of rye on the corn system by studying factors in isolation. soil temperature affects soil moisture, which in turn affects the status of N in the soil see Fig. Because the abiotic factors are related to each other (e.g. If we change the climate, soil type, management, crop type or cultivar, the magnitude of the effects will be different, but the mechanisms will be the same (system-analysis). In turn, soil water, temperature, and N affect yield and nitrate-N leaching. Rye brings into the system root and shoot carbon amounts of certain quality (C/N ratio) that affects soil C and N cycling and influences soil water and temperature. ![]() In contrast, more data exist for abiotic factors such as water and nitrogen limitations, which allowed us to develop a framework to allow a systems-level understanding of rye effects (Fig. Biotic factors include pests and disease pressure and allelopathy, but these are not well understood. Broadly speaking, the factors that could influence whether rye affects yield and nitrate-N leaching can be grouped into biotic and abiotic factors. ![]()
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