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12. Cornell farm study courses in farm management: IV. Farm Management I
13. Cornell farm study courses in farm management: III. Advanced Farm Management
14. Soil erosion and its control
15. Growth hormones in plants: authorized English translation of Die Wuchsstofftheorie und ihre Bedeutung fuÌr die Analyse des Wachstums und der Wachtumsbewegungen der Pflanzen
16. The cultivated races of sorghum
17. Income in agriculture, 1929-1935
18. Forest insects: a text-book for the use of students in forest schools, colleges, and universities, and for forest workers
19. Our natural resources and their conservation
20. Sheep
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