Effect of workability index, degree of mechanization and degree of certainty on the yield of sugar beet

von Buitendijk, J.
Veröffentlicht in Soil & tillage research ; 5.1985 (1985)

Growth reactions of carnation, measured by net photosynthesis, on different air contents of the soil

von Wijk, A. L. M. van
Veröffentlicht in Netherlands journal of agricultural science ; 18.1970 (1970)