Synopsis Some physical characteristics of Hesperia sandy loam were studied after 8 years of 9 different rotation treatments. Data from 4 rotations of cultivated row crops only were compared with data from 4 rotations of Cultivated row crops plus cover crops. Rotations which included cover craps did not significantly increase organic matter content of this soil nor the infiltration rate, did not change bulk density, but did slightly increase degree of cloddiness.
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Flocker et al. (1958) studied this question.