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Published in Soil Sci Soc Am J 24:414-418 (1960)
© 1960 Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Moisture Storage on Fallowed Wheatland in the Great Plains1

O. R. Mathews and T. J. Army2

ABSTRACT

Moisture storage data during the fallow period of annually cropped and alternately cropped-fallowed wheatland from 25 locations throughout the Great Plains were summarized and statistically analyzed. Data, representing over 450 crop-fallow periods, showed that on the average 2.02 inches of water was stored during the fallow portion of an annual cropping system. Under an alternate crop-fallow system, an average of 3.96 inches of precipitation was stored between the harvest of one crop and the seeding of the next.

The amount of moisture stored during the fallow period was found to be related to soil moisture content at the beginning of the fallow period, and the amount of precipitation during the fallow period. Moisture storage efficiency (percent of total precipitation stored) was greater in the northern than in the southern Great Plains.

NOTES

1 Contribution from Soil and Water Conservation Research Division ARS, USDA, with the Montana, North Dakota, South Dakota, Wyoming, Nebraska, Colorado, Kansas, Texas, New Mexico and Oklahoma Agr. Exp. Sta. cooperating. Presented before Div. I & VI, Soil Science Society of America, Nov. 18, 1959, at Cincinnati, Ohio.

2 Research Agronomist (Consultant) and Supervisory Soil Scientist, Soil and Water Conservation Research Division, ARS, USDA, respectively, Beltsville, Md., and Fort Collins, Colo. The authors wish to acknowledge the capable technical assistance of past and present personnel of the field stations where the data used in this article were collected. Computational assistance from the Statistical Laboratory at Texas A and M greatly facilitated the summarization.

Received for publication January 18, 1960. Accepted for publication February 1, 1960.






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