The amount of water that can be absorbed by an oven dry soil at 105•c when it is exposed to an atmosphere of 100% relative humidity is called:

Related Mcqs:

1. Nitrogen & sulphur dioxide liberate from motor vehicles & industries. Nitrogen & Sulphur gases dissolve in the water vapour of atmosphere & form nitric & sulphuric acid. This rain water falls on soil as__________ & contaminates soil also:

   A. Acid rain B. Neutral rain C. Both A & B D. None of the above Submitted by: Shafiq Rehman...

2. Any material such as straw, sawdust, leaves, plastic films, & loose soil that is spread upon the surface of the soil to protect the soil & plant roots from the effects of raindrops, soil crusting, freezing or evaporation:

   A. Mull B. Mulch C. Mycorrhizae D. Muck Submitted by: Shafiq Rehman...

3. Soil-forming minerals occurring in rocks do not contain any water, they undergo ______________ when exposed to humid conditions & break down as in chemical weathering process:

   A. Carbonation B. Acidification C. Hydration D. Dissolution Submitted by: Shafiq Rehman...

4. Soil additive which stabilizes the soil, improves resistance to erosion, increases to permeability to air & water, improves texture, eases cultivation or otherwise improves soil quality:

   A. Soil amendment B. Soil conditioner C. Both a & b D. None of the above Submitted by: Shafiq Rehman...

5. The maximum amount of water which a soil can hold after free drainage has ceased is called as_______?

   A. Water potencial B. Water use efficiency C. Water harvesting D. Water holding capacity Submitted by: Shafiq Rehman...

6. Soil erosion is __________ of soil from one place ti another place by natural agencies (wind & water):

   A. Detachement of soil B. Transportation C. both A & B D. None of these Submitted by: Shafiq Rehman...

7. Any tillage and planting system that maintains at least 30% of the soil surface covered by residue after planting for the purpose of reducing soil erosion by water:

   A. Deep Tillage B. Conservation Tillage C. Both a & b D. None of these Submitted by: Shafiq Rehman...

8. The soil texture refers to the relative proportion of sand,__________ and clay:

   A. Stone B. Soil C. Rock D. Silt Submitted by: Shafiq Rehman...

9. Water occupied the larger soil pores and moves down readily under the force of gravity. Water in excess of the field capacity is termed:

   A. Capillary water B. Hygroscopic water C. Gravitational water D. None of the above Submitted by: Shafiq Rehman...

10. Most common rocks, after exposed to weathering which cover about ______% 0f the earth:

    A. metamorphic rocks B. Sedimentary rocks C. Igneous rocks D. Shales Submitted by: Shafiq Rehman...