Browsing Agricultural Experiment Station -- Station Circulars by Subject "Soil fertility -- Oregon"

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Crop rotation and soil fertility

Powers, W. L. (Wilbur Louis), b. 1887; Oregon Agricultural College. Experiment Station; Ruzek, C. V. (Charles Vladis), 1887- ([Corvallis, Or.] : Oregon Agricultural College, Experiment Station, 1923-06)
Soil fertility in relation to productive land value

Powers, W. L. (Wilbur Louis), b. 1887; Oregon State Agricultural College. Agricultural Experiment Station ([Corvallis, Or.] : Agricultural Experiment Station, Oregon State Agricultural College, 1935-10)