TY  - BOOK
AU  - Bartholomew, W. V.
AU  - Clark, Francis E.
TI  - Soil nitrogen
T2  - Agronomy
U1  - 631.411 
PY  - 1965///
CY  - Madison
PB  - American Society of Agronomy
KW  - Suelos
KW  - Nitrógeno en
ER  -