TY  - BOOK
AU  - RUSSELL, Walter E
TI  - Soil conditions and plant growth
U1  - 631.4 
PY  - 1961///
CY  - London
PB  - Longman
KW  - Nitrogen cycle
KW  - Soil atmospheric nutrient
KW  - Soil microorganism
KW  - Soil plant nutrient
ER  -