-
831
-
832
Effects of crop rotation and straw management on yield and agronomic characters of rice in a heavy clay soil
Baskı/Yayın Bilgisi 1964Tez -
833
Grain yields and the American food supply ; an analysis of yield changes and possibilities
Baskı/Yayın Bilgisi 1962Kitap -
834
-
835
-
836
-
837
Annual food crops cereals, sugar cane, food legumes, and root and tuber crops
Baskı/Yayın Bilgisi 1958Kitap -
838
-
839
-
840