| dc.description.abstract | Many alternative management systems have been evaluated for corn (Zea mays l.), soybeans (Glycine max l.), and wheat (Triticum aestivum L.) production, however, most have involved rotations from one year to the next. Legume interseeding systems which employ canopy reduction techniques in corn have not been thoroughly evaluated. One study was initiated in 1994 at the Panhandle Research Station near Goodwell, OK, on a Richfield clay loam soil, to evaluate five legume species: yellow sweet clover (Melilotus officinalis L.), subterranean clover (Trifolium subterraneum L.), alfalfa (Medicago sativa l.), arrowleaf clover (T. vesiculosum l.) and crimson clover (T. incarnatum l.) interseeded into established corn. In addition, the effect of removing the corn canopy above the ear (canopy reduction) at physiological maturity was evaluated. Canopy reduction increased liight interception beneath the corn thus enhancing legume growth in late summer, early fall, and early spring; the following year prior to planting. Legumes incorporated prior to planting were expected to lower the amount of inorganic nitrogen fertilizer needed for corn production. Crimson clover appeared to be more shade tolerant than the other species evaluated. Grain yields were not affected by removing the tops at physiological maturity when compared to conventionat management. Following two years, no response to applied N as fertilizer or incorporated green manure legumes was observed. Added time will be required to evaluate these practices at this site where residual soil N was high. | |
