Nitrogen.
Contributors: Conservation in Agricultural Education. Guidance Group.; Farming and Wildlife Advisory Group.
Edition: [rev. ed].
Series: CAE lecture note no.5
Publisher: Conservation in Agricultural Education Guidance Group
Published: 1987
Place of publication: Sandy (Beds.)
Language: eng
Notes: At head of title: Conservation in Agricultural Education, Guidance Group.

Sponsored by the Farming and Wildlife Advisory Group.