Residual effects of fall- and spring-applied nitrogen fertilizers on crop yields in the southeastern United States /

Caption title.

Liquid nitrogen fertilizers for direct application /

Bibliography: p. 40-46.

A Competitive assessment of the U.S. nitrogen fertilizer industry /

"October 1986."

Pasture productivity of crested wheatgrass as influenced by nitrogen fertilization and alfalfa

Prepared in cooperation with Dept. of Animal Science, North Dakota Agricultural Experiment Station.

A method of economic analysis applied to nitrogen fertilizer rate experiments on irrigated corn /

Literature cited: p. 62-63.

Die gegenwärtige lage der stickstofffrage & ihre bedeutung für den landwirtschaftlichen betrieb.

Mode of access: Internet.