TY  - BOOK
AU  - POONIA, Soni Ram
TI  - Availability of calcium from calcium carbonate and calcium sulphate in saline-alkali and alkali soils
U1  - T 631.842 P67A 
PY  - 1969///
CY  - Ludhiana
PB  - P.A.U
KW  - SOILS -- CALCIUM CONTENT
ER  -