Soil Science

Basalt is a __________ rock: A. fine-grained B. Dark colouredC. both A & B D. None of the above

‘A’ horizon of the soil is also designated: A. Eluvistal horizon B. Illuviated horizon C. Alluvial horizonD. None of the above.

Weathering process-physical, chemical, and biological _______________, the rocks and minerals into simpler products which either accumulate in place or are transported to other places where they become soil parent materials? A. Disintegrate B. Disentigrate C. DecomposeD. Both a & c

Rocks and weathered materials transported by ___________ ,act as initial materials for soil formation? A. Water B. Wind C. GlaciersD. All of the above

From the point of view of crop production, Soil testing refers to______________? A. Laboratory analysis assessing plant available nutrient status B. Collection of plant leaves samples only C. Salinity & elemental toxicity of a soilD. Both A & C

The diagnostic techniques used in evaluating soil nutrient status and determining fertilizer requirements of the crop include: A. Nutrient deficiency symptoms & field experimentation B. Greenhouse pot experimentation & soil testing C. Plant analysisD. All of the above

The major soil fertility problems in Pakistani soils deficiencies of N, P and Zn. Deficiencies K, Fe, and B also occur in specific crop genotypes or soil types, while deficiencies of S, Cu, and Mn are negligible. however, the common nutrient deficiencies are_________________: and some micronutrients including Mo? A. N, P, K B. Ca, Mg,…

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…

The kind, rate and intensity and pedogenic processes are controlled by ________ ,soil-forming factors? A. 6 B. 7 C. 4D. None of the above 

Pedogenic processes bring about changes in the parent materials in the form of _____________________, within the soil body (soil profile)? A. Additions, losses B. Transfers and transformationsC. both A and B D. None of the above