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Crop Rotation and Soil Fertility
作者
Wilbur Louis Powers / Charles Vladis Ruzek
出版1923
ISBN
UIUC:30112019822425
主題
Crop rotation
Oats
作者
Martin Nelson
出版1914
ISBN
UIUC:30112019416053
主題
Agriculture
Agricultural Research Serves to Relieve the Tax Bu...
作者
Gustav Wesley Kuhlman / Harold Lympton Ewalt / Harry August Schoth / James Niven Shaw / Ralph Stephen Besse / Roderick Sprague / Walter Theodore Johnson / Wilbur Louis Powers / William Donald Edwards
出版1938
ISBN
UIUC:30112019814810
主題
Agricultural experiment stations
Station Bulletin
作者
Charles Vladis Ruzek
出版1932
ISBN
UIUC:30112019817045
主題
Agriculture
The Use of Landplaster
作者
Charles Vladis Ruzek / Oregon Agricultural College. Extension Service
出版1922
ISBN
OCLC:65223792
主題
Gypsum
Crop Rotation and Soil Fertility
作者
Wilbur Louis Powers / Charles Vladis Ruzek
出版1923
ISBN
UIUC:30112019822425
主題
Crop rotation
Care, Use and Economic Value of Farm Manure
作者
Wilbur Louis Powers
出版1931
ISBN
UIUC:30112019821476
主題
Farm manure
Potato Virus Diseases
出版1931
ISBN
OCLC:20292972
主題
Calves
Soils of Willamette Series and Their Utilization
作者
Wilbur Louis Powers / Oregon State University. Agricultural Experiment Station
出版1928
ISBN
OCLC:20277392
主題
Soils
Soil Survey Of Multnomah County, Oregon
作者
Charles Vladis Ruzek
ISBN
1022349228 / 9781022349223
主題
History
Incidence of Public School Taxation in Oregon with...
作者
Charles Vladis Ruzek / David Edmund Stephens / Frank Paden McWhorter / Frederick Earl Price / Halbert Edgerton Selby / Joseph Roy Haag / Milton Nels Nelson / Wilbur Louis Powers / William Henry Dreesen
出版1932
ISBN
UIUC:30112019814786
主題
Bulls
The "Red Hill" Soils of Western Oregon and Their U...
作者
Charles Vladis Ruzek / Oregon State University. Agricultural Experiment Station
出版1932
ISBN
OCLC:20300082
主題
Soils
The Use of Phosphorus on Oregon Soils
作者
Charles Vladis Ruzek / Oregon Agricultural College. Extension Service / Oregon Agricultural College. Department of Soils
出版1919
ISBN
OCLC:65432972
主題
Phosphatic fertilizers
Soils of Chehalis Series and Their Utilization
作者
Wilbur Louis Powers
出版1932
ISBN
OCLC:20299994
主題
Soils
Major Soil Fertility Experiments, Corvallis Area, ...
作者
Wilbur Louis Powers / Charles Vladis Ruzek / Oregon State College. Agricultural Experiment Station
出版1948
ISBN
OCLC:709623196
主題
Soil fertility
The Use of Phosphorous on Oregon Soils
作者
Charles Vladis Ruzek
出版1922
ISBN
OCLC:1004753157
主題
Phosphatic fertilizers