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Control of Soil Moisture Regimes in Greenhouse Studies by the Neutron Method¹

ABSTRACT

A calibration curve for measurement of soil moisture regimes by the neutron method is shown for a greenhouse study. A linear regression analysis was used to determine the equation for the best fitting neutron-soil moisture data. The equation was established by relating percent of neutron standard and tension in atmospheres. This relationship was determined as log T = c + bY where T is tension in atmospheres and Y is percent of neutron standard.

¹ Contribution from the Soil and Water Conservation Research Division, ARS, USDA, in cooperation with the Georgia Agr. Exp. Sta.

² Soil Scientist and Agricultural Aid, respectively, USDA, Southern Piedmont Soil Conservation Field Station, Watkinsville, Ga.

Received for publication May 7, 1960. Accepted for publication June 3, 1960.