Symposium of the divisions s 8 and s 4 of the soil science society of america divisions c 1 c 2 and c 3 of the crop science society of america and the division a 4 of the american society of agronomy with the tri society annual meeting on moving off the yield plateau tucson arizona usa august 25 1970
Cropping strategies for efficient use of water and nitrogen : proceedings of a symposium sponsored by Divisions S-4, S-6, S-8, C-3, and A-6 of the Soil Science Society of America, Crop Science Society of America, and the American Society of Agronomy in Atlanta, GA, 30 Nov. and 1 Dec. 1987
, 1971