TY  - BOOK
AU  - Malik, Ram Singh
TI  - Indices of nitrigen availability in soils of Haryana, Punjab and Himachal Pradesh
U1  - T 631.416 M29I 
PY  - 1968///
CY  - Ludhiana
PB  - PAU
KW  - SOILS - NITROGEN CONTENT - HARYANA
KW  - SOILS - NITROGEN CONTENT - HIMACHAL PRADESH
KW  - SOILS - NITROGEN CONTENT - PUNJAB
ER  -