A. OH1 HCO2
B. SO4-2 OH
C. CO3-2 SO4-2
D. All the above
Soil Science
pH in coniferous forest is………………?
A. Less than 7
B. Neutral
C. Greater than 7
D. Basis
A soil is categorized as saline when EC of saturation extract is………………….?
A. >4dsm-1
B. 0.4dsm-1
D. 0.4 4.0 dsm-1
How much percentage of soils of Pakistan are deficient in P………………….?
A. 60
C. 50-70
D. 80-90
Microorganisms have C/N ratio of………………..?
A. 2:1
B. 4:1
C. 12:1
D. 20:1
The zorawar is brand name of ……………….?
A. TSP
B. DAP
C. MAP
D. None of the above
The factor used for conversion of P to P2O3 is………………..?
A. o.453
B. 0.643
C. 0.436
D. None of the above
Acid soil contain pH………………..?
A. <7
B. >7
C. >7.0
D. 8.5
DAP fertilizer available in Pakistan contains……………………..?
A. 18% N & 46% P2O5
B. 46%N & 18%P2O3
C. 100%P2O3
D. 50%P2O3
Buffer solution is a solution which resist change in ……………… ?
A. pH
B. SAP
C. EC
D. RSC