A. Bas saturation percentage = CA+Mg+Na / CEC x 100
B. Bas saturation percentage = /CEC / CA+Mg+Na x 100
C. Bas saturation percentage = /CEC / CA+Mg x 100
D. None of the above

A. ECi:<1.5, SAR < 10 & RSC< 2.5
B. ECi:>1.5, SAR > 10 & RSC> 2.5
C. ECi:>1.5, SAR 2.5
D. Both a & b

A. < 4 dsm-1
B. Equal to 4 dsm-1
C. 4-8 dsm-1
D. None of the above

A. (NH2) HPO4
B. NH4H2PO4
C. NH4H2PO4
D. Both a & c

A. NH nitrogen the NO3 nitrogen in soil
B. NO2 to NO3 nitrogen in soil
C. NO3 nitrogen to NH4 + in soil
D. None of the above

A. Ratio autoanalyser
B. GM counter
C. Neutron probe
D. Dosimeter

A. 25%N & 23% P2O3
B. 46%N & 23% P2O3
C. 23%N & 23% P2O3
D. None of the above

A. NaOH
B. NH4Cl
C. NH4OH
D. None of the above

A. Gapon
B. Felbeek
C. Neir
D. Liekig

A. Amino acid
B. Lignin
C. fats
D. Cellulose