Abstract
Crimson clover (Trifolium incarnatum L.) plus hairy vetch (Vicia villosa Roth), red clover (Trifolium pratense L.), white clover (Trifolium repens L.), red clover plus white clover, and bermudagrass (Cynodon dactylon [L.] Pers.) were evaluated as cover crops for pecans. Crimson clover plus hairy vetch supplied the equivalent of 101 to 159 kg nitrogen (N)/ha. Red clover plus white clover supplied up to 132 kg N/ha. Either white clover or red clover alone were less effective in supplying N than when grown together. Soil Kjeldahl-N was usually not affected or increased using the legumes compared to fertilized bermudagrass sod. Soil nitrate (NO 3 ) concentrations during October were occasionally higher in unfertilized legume plots than in bermudagrass plots with March-applied N.
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