TY  - BOOK
AU  - Singh, Hargopal
TI  - Evaluation of critical levels of zinc in soils for rice
U1  - T 633.18 S48E 
PY  - 1979///
CY  - Ludhiana
PB  - P.A.U
KW  - RICE - FERTILIZERS AND MANURES
KW  - CRITICAL LEVELS
KW  - RICE
KW  - SOIL CHEMISTRY
KW  - SOILS
KW  - SOILS - ZINC CONTENT
KW  - ZINC
N2  - The order of the various methods for extracting the amount of available Zn was: 005M EDT A >001M EDTA-(NH4)2C03>0.005M DTPA>double acid>soil solution Zn Stepwise multiple regression analysis indicated that DTPA, EDTA-(NH4)2C03 and EDTA available Zn largel
ER  -