MCQs Soil Science-48 Posted on May 6, 2025August 30, 2025Author agropublishers 0 1. Which of the following is NOT a function of healthy soil? Water filtration Higher CO₂ emission to the atmospheric Enhanced biodiversity Carbon sequestration 2. __________ is a dispersing agent commonly used in soil textural analysis to break up clay and other particles, allowing for accurate particle size distribution measurements Sodium heptahydrate Sodium hexametaphosphate Sodium hexafluorosilicate Sodium metabisulfite 3. In horizontal infiltration, water movement is primarily driven by_________ Solute potential Gravitational potential Matric potential Pressure potential 4. Mass of unit volume of dry soil is called_________ Soil moisture content Particle density Bulk density Soil porosity 5. __________ are plants that are adapted to grow in environments with high salt concentrations, such as salt marshes, salt deserts, or saline soils Glycophytes Hydrophytes Xeropytes Halophytes 6. According to the standard soil texture classification, clay particles have a diameter of ___________ < 2 mm < 0.002 mm < 0.2 mm <0.02 mm 7. Water moves up from the soil, reaching the highest point of tall trees, through the xylem. This is driven by _____________ Cohesive forces Combination of Cohesive and Adhesive forces Osmosis Adhesive forces 8. Allophanes and amorphous minerals rarely develop a permanent charge, mainly due to reason that _____ None of these They have very small size They are secondary minerals They lack a crystalline structure 9. Blakish or dark coloured soils are considered most fertile as they often contain ________ Clay and humus Gravel and Sand Sand and calcium Silt and microorganisms 10. Humus typically has a negative charge; however, ________ can cause the development of a positive charge Deprotonation of humus Protonation of humus None of these Decomposition of humus Loading … Question 1 of 10
