TY  - BOOK
AU  - Robinson, J. B. D.
TI  - The soil nitrogen index and its calibration with crop performance to improve fertilizer efficiency on Arable soil
SN  - 0851983405
PY  - 1975///
CY  - Slough, England
PB  - Commonwealth Agricultural Bureaux
KW  - Nitrogen fertilizers
KW  - Fertilizers
KW  - Soil fertility
ER  -