TY  - BOOK
AU  - Stevenson,F.J.
TI  - Nitrogen in agricultural soils
SN  - 0891180702
AV  - S592.6.N5 N566 1982
U1  - 631.4/16�19 
PY  - 1982///
CY  - Madison, Wis.
PB  - American Society of Agronomy
KW  - Soils
KW  - Nitrogen content
KW  - Plants, Effect of nitrogen on
KW  - Crops and soils
KW  - Nitrogen fertilizers
ER  -