TY  - BOOK
AU  - Schroth , G
AU  - Sinclair , F.L
TI  - Trees , crop and soil fertility concepts and research methods
SN  - 0851995934
U1  - 631.132 
KW  - SOIL FERTILITY
KW  - AGROFORESTRY
KW  - SOIL FERTILITY - RESEARCH
ER  -