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Nitrogen fertilizers

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Current results range from 1915 to 1970

1.
Effects of nitrogenous fertilizers on California range as measured by weight gains of grazing cattle
Author
Martin, William E., 1907-1972
Published
Berkeley, Cal. : California Agricultural Experiment Station, 1970.
Online
Online book
Location
HathiTrust Digital Library >> Online Resource
Format
Books / Online
2.
The determination of availability of nitrogenous fertilizers in various California soil types by their nitrifiability
Author
Lipman, C. B. (Charles Bernard), 1883-1944
Published
Berkeley, Cal. : Agricultural Experiment Station, 1915.
Online
Online book
Location
HathiTrust Digital Library >> Online Resource
Format
Books / Online