The process of humus formation is called :
Leaching.
Humification.
Mineralization.
Detrifaction.
Which Nitrogen fixing bacteria is present on the surface of roots of tropical grasses ?
Azospirillum.
Azotobacter.
Clostridium.
Pseudomonas.
Bio phages are :
Consumers.
Heterotrophs.
Phagotrophs.
All of these.
The rate of biomass production is called :
Gross productivity.
Standing crop.
Productivity.
Assimilation.