TY  - GEN
AU  - NELSON, WERNER L
AU  - TISDALE, SAMUEL L
TI  - SOIL FERTILITY AND FERTILIZERS
U1  - 631.8 TIS/SO 
CY  - NEW DELHI, PRENTICE HALL OF INDIA
KW  - CROPPING SYSTEM
KW  - GROWTH
KW  - PLANT NUTRITION
KW  - SOIL MANAGEMENT
ER  -