PakQuizHub

1.Which factor is considered the primary constraint on plant growth in acidic soils with a pH lower than 5.0-5.5?

2.What term describes the process of eliminating surplus water from the earth's surface?

Underground water removalSurface operationsWater drainageEvery option listed

3.How does applying P2O5 fertilizer to a green manure legume crop influence the phosphorus availability for the following crop?

Green manure enhances phosphorus availability in organic form for the subsequent crop.It has no impact on the phosphorus availability to the next crop.More phosphorus is absorbed and transformed into organic compounds, which are released when the green manure decomposes.It binds P2O5 in humus, thereby decreasing its availability.It increases phosphorus fixation, reducing its availability to the succeeding crop.

4.What does the term 'groundwater' specifically refer to?

Assessment of water purityThe location of underground water-bearing formationsManagement of water resourcesSetting up water extraction wells

5.What is the calcium percentage present in single superphosphate fertilizer?

6.What is the pF value corresponding to the water tension at the plastic limit of soil?

7.Clay and humus particles, known as colloids, measure less than 0.002 mm. Because of their tiny size, colloids possess ________________ surface area that facilitates adsorption, catalysis, precipitation, and microbial colonization:

8.Where should soil samples be taken from for accurate analysis?

Areas where fertilizer or soil amendments have just been appliedSections of the field showing a white salt crust on the surfaceEdges or borders of the fieldNone of the above

9.Which type of erosion involves the uniform removal of a thin soil layer by water flowing evenly across the surface, often affecting fertile sloped lands with soil loss up to approximately 15 cm?

Erosion caused by raindrop impact and small channelsErosion occurring along the edges of streamsErosion characterized by the gradual stripping of a thin soil layer across a broad areaErosion forming large, deep channels or gulliesNone of the above

10.Pakistan experiences generally low rainfall, ranging from 125 mm per year in upper Sindh to approximately 900 mm in the northern sub-mountainous regions. In Balochistan, the average yearly precipitation is around 200 mm, decreasing to about ________ mm in the Kharan desert area:

100 millimetersMore than 70 millimetersLess than 50 millimetersNone of the above

11.Which of the following is NOT considered a loss of soil water?

Evaporation directly from the soil and transpiration by plantsWater percolating downward beyond the root zoneWater flowing off the surface of the fieldHydroponic water loss

12.What is the proportion of igneous, metamorphic, and sedimentary rocks in the Earth's crust?

12.5% igneous - 12.5% metamorphic - 75% sedimentary64.7% igneous - 27.4% metamorphic - 7.9% sedimentaryNeither option A nor B is correct7.9% igneous - 27.7% metamorphic - 64.4% sedimentaryNot listed

13.Approximately what percentage of the Earth's crust is made up of oxygen and silicon combined?

64 percent79 percent75 percent73 percent

14.What is the approximate percentage of potassium (K) found in the Earth's crust?

15.Where is Nitrophos produced in Pakistan?

16.Where does the National Fertilizer Corporation (NFC) produce all Single Super Phosphate (SSP) and some Nitrophos fertilizers locally?

17.Which of the following are the primary phosphatic fertilizers used in Pakistan?

Diammonium Phosphate (DAP)Single Super Phosphate (SSP)Nitrophos fertilizerAll of the above

18.Besides being a source of essential nutrients for plants, what additional roles does Soil Organic Matter (SOM) fulfill?

19.Humus is composed of decomposed organic matter that has undergone multiple cycles of breakdown and synthesis. Humic substances are a group of highly acidic, yellow to black colored, high molecular weight compounds __________________, which can be isolated through various extraction methods:

Hymatomelanic acid and HuminHumic acid and Fulvic acidBoth A and BNone of the above

Agriculture Mcqs – MCQs