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f j sievers
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Cilt sonuçları
Sugar beets under irrigation in Washington
F. J. Sievers · State College of Washington, Agricultural Experiment Station
41 sayfa · 1919
Sugar beet / Irrigation
The maintenance of crop production on semi-arid soil
F. J. Sievers · State College of Washington, Agricultural Experiment Station
29 sayfa · 1927
Arid regions agriculture
The significance of nitrogen in soil organic matter relationships
F. J. Sievers · State College of Washington, Agricultural Experiment Station
43 sayfa · 1926
Soils / Soil formation / Soils and climate / Composition / Nitrogen content