Teaching BPSC बिहार मध्य विद्यालय (6 to 8) शिक्षक भर्ती 4.0 Mock Test General Knowledge Geography (World Geography) Biogeography
Which of the following factors is not the determinant of soil productivity?
1
Soil color
2
Soil chemical composition
3
Microbial population
4
More than one of the above
5
None of the above