Appropriate Technology of Alternative Agricultural Practices on Drylands

摘要

Results are presented of a project undertaken to determine whether agricultural productivity on land treated with sewage sludge was different from that of land treated with inorganic fertilizer. Two sites were selected: (1) a farm in southcentral Oklahoma which had been overgrazed; and (2) a farm in east-central Kansas where winter wheat and sorghum were grown. Plants grown with sludge were taller, had a larger leaf area, and had a higher dry weight than plants grown with inorganic fertilizer. Plants grown with sludge and those grown with inorganic fertilizer yielded the same amount of grain.