Primary air pollution is____________________?

Related Mcqs:

Organic soil are called____________________?

A. Peat B. Arid soil C. Muck D. Both a & b...

Permanent change in soil is due to__________________?

A. Ionic bonding B. pH change C. Covalent bonding D. Isomorphic substitution...

Soil water can be determined by_____________________?

A. Mass water content B. Macro pores C. Both a & b D. None of the above...

The conductivity of a saturation extract is greater 4 dsm-1 an exchangeable sodium percentage (ESP) of less than 15 and the pH is usually less than 8.5 is called as__________________?

A. Saline soils B. Saline-sodic soils C. Sodic soils D. Neutral soils...

Boron concentration is irrigation water is considered safe only upto_________________?

A. 0.7 ppm B. 1.5 ppm C. 2 ppm D. 3 ppm...