| 1 |
Manures and fertilizers : a text-book for college students and a work of reference for all interested in the scientific aspects of modern farming / by Homer J. Wheeler
New York : Macmillan , 1913
|
| 2 |
Soils : their properties and management / by T. Lyttleton Lyon, Elmer O. Fippin, Harry O. Buckman
New York : Macmillan , 1915
|
| 3 |
Field crops for the Cotton-Belt / James Oscar Morgan
New York : Macmillan , 1918, c1917
|
| 4 |
The principles of irrigation practice / by John A. Widtsoe
New York : Macmillan , 1914
|
| 5 |
Elements of agriculture / G.F. Warren
New York : Macmillan , c1909
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