TY  - BOOK
AU  - Schroth, G
TI  - Trees, Crops and soil fertility: Concepts and research methods
SN  - 0 85199 593 4
PY  - 2003///
CY  - UK
PB  - Cabi publishing
KW  - Soil fertility
KW  - Agroforestry
KW  - Soil fertility research
ER  -