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Legume Cover Crop Benefits Tomatoes
WASHINGTON - Jul 6/04 - SNS -- USDA Researchers have found tomatoes grown in a sustainable agricultural system using a legume cover crop as fertilizer had better disease resistance and lived longer than tomatoes grown on black polyethylene mulch with chemical fertilizer.
Based on a five-year sustainable agriculture study, the results are published in the current issue of the Proceedings of the National Academy of Sciences. ARS is the U.S. Department of Agriculture's chief scientific research agency.
The scientists showed that at least 10 genes in the leaves of tomatoes grown in the sustainable system were turned on longer, or "over-expressed," allowing those tomatoes to live longer than tomatoes grown on the plastic mulch. These "over-expressed" genes may respond to signals emanating from the specific ratio of nitrogen, carbon and other elements provided by the cover crop.
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