Yazar
William Jasper Spillman
15 cilt bulundu.
Cilt sonuçları
Farm Diary
World Book Company, William Jasper Spillman · Franklin Classics Trade Press
440 sayfa · 2018
Kategori yok
Renovation of worn-out soils
William Jasper Spillman · U.S. Dept. of Agriculture
16 sayfa · 1906
Soil management / Soil productivity / Soil / Nomesh
Balancing the farm output
William Jasper Spillman · Orange Judd publishing co.
126 sayfa · 1927
Agriculture / Economic aspects / Economic aspects of Agriculture
Human food from an acre of staple farm products
Morton O. Cooper, William Jasper Spillman · U.S. Dept. of Agriculture
11 sayfa · 1917
Agricultural productivity
Picture of the Grain Industry; Crop Areas--Buying Areas--future of the Industry
W. J. (William Jasper) Spillman, Ch American Institute of Agriculture · Creative Media Partners, LLC
Sayfa sayısı yok · 2023
Kategori yok
Application of some of the principles of heredity to plant breeding
William Jasper Spillman, United States. Bureau of Plant Industry · Govt. Print. Off.
74 sayfa · 1909
Plant breeding