TY  - BOOK
AU  - Keulen,H.Van
AU  - Heemst,H.D.J.van
TI  - Crop response to the supply of macronutrients
SN  - 902200807X
PY  - 1982///
CY  - Wageningen, Netherlands
PB  - Center for Agricultural Pub. and Documentation
KW  - Filed crops
KW  - Fertilizers and manures
KW  - Plants, Effect of nitrogen on
KW  - Plants, Effect of phosphours on
KW  - Plants, Effect of potassium on
ER  -