Biological efficiency in agriculture /
Spedding, C. R. W.
Biological efficiency in agriculture / C.R.W. Spedding, J.M. Walsingham and A.M. Hoxey - London : Academic Press, 1981 - 350 p. ; 23 cm.
0126565600
Field crops--Physiological effect
Biological efficiency in agriculture / C.R.W. Spedding, J.M. Walsingham and A.M. Hoxey - London : Academic Press, 1981 - 350 p. ; 23 cm.
0126565600
Field crops--Physiological effect
