TY  - REP
TI  - Es bien sabido - Las plantas necesitan calcio
T2  - Nutri-Verdades
CY  - Georgia (USA)
PB  - Potash and Phosphate Institute, [1997]
KW  - Calcium
KW  - Nitrogen content
KW  - Nutrient uptake
KW  - Nutritional requirements
KW  - Plant physiology
KW  - Soil fertility
KW  - AGROVOC
KW  - Nitrogen fertilizers
ER  -