Environment And Road Safety Education And Violence Against Women And Children And Drug Abuse 2020 Exam With Answers

Practice Mode:
19.

The relative proportions of different mineral particles in soil refers to

A: Soil Horizon
B: Soil Composition
C: Soil Texture
D: Soil Aggregates

The answer is: C

Explanation

The relative proportions of different mineral particles in soil refer to soil texture.

Soil texture refers to the composition of mineral particles in the soil, specifically the relative proportions of sand, silt, and clay particles. These mineral particles vary in size, with sand being the largest, followed by silt, and then clay being the smallest.

The proportions of sand, silt, and clay in soil determine its texture and influence its physical properties, such as water-holding capacity, drainage, and nutrient availability. Different soil textures have distinct characteristics:

•Sandy soil has larger particles, which create large pore spaces that allow for rapid drainage but have low water-holding capacity.
•Silty soil has medium-sized particles that hold water better than sandy soil and offer moderate drainage.
•Clayey soil has the smallest particles and holds water well but drains slowly, leading to higher water retention.

Soil texture is important in agriculture and soil management, as it affects the soil's fertility, structure, and its suitability for various crops. Soil texture can be determined through laboratory analysis or estimated using textural classification systems based on the relative proportions of sand, silt, and clay particles.