Soil moisture and nitrate tests
Subtitle: when are they useful?
By: [prepared by A.R. Halvorson].
Contributors: Washington State University. Cooperative Extension Service.
Series: Extension mimeo -- 3523.; Extension mimeo (Washington State University. Cooperative Extension Service) -- 3523.
Publisher: Cooperative Extension Service, College of Agriculture, Washington State University
Published: 1971
Place of publication: Pullman
Language: eng
Notes: Cover title.

"November 1971."

"E.M. 3523."