Access tubes and timers for use with nuclear soil moisture meters
By: [Richard B. Marston]
Contributors: Central States Forest Experiment Station (Columbus, Ohio)
Series: Research note CS / U.S. Forest Service -- 30; U.S. Forest Service research note CS -- 30.
Publisher: Central States Forest Experiment Station
Published: 1965
Place of publication: Columbus, Ohio
Language: eng
Subjects: Soil moisture
Notes: Caption title.

"March 1965."