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SUBJECTS (1-2 之 2)
Drills (Planting machinery)
1
PRINTED MAT
 

Relation of dust fungicides to flow of small grains through drills and to drill injury


Leukel, R. W.
Washington, D.C. : U.S. Dept. of Agriculture, 1930. 1930

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複本
2
PRINTED MAT
 

Revegetation by land imprinter and rangeland drill


Clary, Warren P.
Ogden, UT (324 25th St., Ogden 84401) : U.S. Dept. of Agriculture, Forest Service, Intermountain Research Station, [1989] 1989

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複本
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