The marble is a__________?
The marble is a__________?
A. Dynamo metamorphic
B. Thermo metamorphic
C. Hydro metamorphic
D. Not sure
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A soil is categorized as saline when EC of saturation extract is______________________?
A soil is categorized as saline when EC of saturation extract is______________________?A. >4dsm-1
B. 0.4dsm-1
D. 0.4 4.0 dsm-1Nitrogen gases are involved in_____________________?
Nitrogen gases are involved in_____________________?A. Sleepy feelings
B. Hair disease
C. Mental disease
D. Acid rainsConservation agriculture improves the water use efficiency of dryland systems. It has components:
Conservation agriculture improves the water use efficiency of dryland systems. It has components:A. Reduced soil disturbance through no-till or minimum till
B. Residue return to keep at least 30% of soil covered
C. Crop rotations for better utilization of available water & nutrients
D. all of the aboveIn which form plant uptake phosphorus?
In which form plant uptake phosphorus?A. H2po4
B. HPO4-2
C. Both
D. Non of theseThe drawbacks of erosion can be divided into:__________?
The drawbacks of erosion can be divided into:__________?A. Onsite damages
B. Offsite damages
C. Both A & B
D. None of the aboveAccording to a latest research, Pakistan is predominantly a dryland country; 80% of its land area is arid and semi arid, 12% sub-humid and 8% under humid climate. Thus , soils of arid & semi-arid regions are vulnerable to a wide range of degradation process. As the case in arid and semi-arid climates elsewhere in south-central/southern Asia and Sub-Saharan Africa; _________________ are among the major causes of soil degradation and desertification?
According to a latest research, Pakistan is predominantly a dryland country; 80% of its land area is arid and semi arid, 12% sub-humid and 8% under humid climate. Thus , soils of arid & semi-arid regions are vulnerable to a wide range of degradation process. As the case in arid and semi-arid climates elsewhere in south-central/southern Asia and Sub-Saharan Africa; _________________ are among the major causes of soil degradation and desertification?A. Drought stress
B. Accelerated erosion & salinization
C. Depletion of soil fertility and SOM
D. All of the above