TY  - BOOK
AU  - Robinson,J.B.D.
TI  - The soil nitrogen index and its calibration with crop performance to improve fertilizer efficiency on Arable soils
SN  - 0851983405
PY  - 1975///
CY  - Slough, England
PB  - Commonwealth Agricultural Bureaux
KW  - Soils
KW  - Nitrogen content
KW  - Nitrogen fertilizers
KW  - Nitrification
KW  - Analysis
N1  - p. 47-53
ER  -