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Production of Sugar Beets Following Winter Green Manure Cropping in California: II. Soil Physical Conditions and Associated Crop Response¹

ABSTRACT

A procedure is described for measuring volumetrically the rate of water infiltration in field furrows. The technique developed was used to determine the effect of green manure crops on soil structure during the growth of a succeeding crop of sugar beets. At one location a green manure crop of barley increased the rate of infiltration. This result was associated with an increase in sugar production where nitrogen fertilization insured optimum fertility. Tractor travel in furrows was observed to have a significant depressing effect on the rate of infiltration.

¹ Contribution from the Department of Agronomy, University of California, Davis.

² Assistant Professor of Agronomy, Professor of Irrigation, and formerly Assistant Professor of Agronomy, respectively, University of California, Davis.

³ The co-operation of Mr. O. T. Rice, Rancher, Mr. H. L. Hall, Farm Adviser, and Mr. F. J. Hills, Extension Agronomist, University of Calif. Agr. Ext. Ser., in the experiment at Santa Maria is gratefully acknowledged.

Received for publication October 15, 1955. Accepted for publication June 14, 1956.