A. FeS and Fe2S3
B. Organic sulphates and -SH
C. Soluble inorganic sulphates
D. All of these
Ecology and General Silviculture
Ecology and General Silviculture
A. Grasslands
B. Forests
C. Planktons
D. Epiphytes
A. 9 x 1013 kg
B. 8 x 1012 kg
C. 9 x 1011 kg
D. 8 x 1010 kg
A. 150
B. 1,500
C. 300
D. 3,000
A. Metabolism of producers
B. Metabolism of consumers
C. Both (a) & (b)
D. Combustion of fuel
A. CO2 of carbonic rocks
B. Atmospheric CO2
C. Fossil fuel
D. All of the above
A. Inorganic phosphates are lost by leaching
B. Ocean phosphates are lost by sedimentation
C. Soluble phosphates are lost by erosion
D. Soil has plenty of dissolved phosphates
A. Hydrologic
B. Phosphorus
C. Nitrogen
D. Sulphur
A. Producers only
B. Producers and consumers
C. Consumers and decomposers
D. All of these
A. 75
B. 65
C. 85
D. 95