TY  - BOOK
AU  - PRUMMEL, J
TI  - Effect of potassium deficiency and topdressing after crop analysis on yied of potatoes from diluvial sandy soils
U1  - 635.212 P89E 
PY  - 1969///
PB  - Wageingen
KW  - SANDY SOILS
KW  - POTASH AS FERTILIZER
KW  - POTATOES -- FERTILIZERS AND MANURES
ER  -