Whitehead, D. C.
The role of nitrogen in grassland productivity : a review of information from temperate regions / D. C. Whitehead. - Bucks, England : Commonwealth Agricultural Bureaux, c1970. - viii, 202 p. : ill.
0851980155
Nitrogen fertilizers.
Soils--nitrogen content.
Pastures--fertilizers.
The role of nitrogen in grassland productivity : a review of information from temperate regions / D. C. Whitehead. - Bucks, England : Commonwealth Agricultural Bureaux, c1970. - viii, 202 p. : ill.
0851980155
Nitrogen fertilizers.
Soils--nitrogen content.
Pastures--fertilizers.