SCSC 301 Questions and Answers
Already Passed
What is the main component of soil that influences its texture?
Soil texture is primarily determined by the relative amounts of sand, silt, and clay particles.
How does soil pH affect plant growth?
Soil pH influences nutrient availability and...
SCSC 301 Questions and Answers
Already Passed
What is the main component of soil that influences its texture?
✔✔Soil texture is primarily determined by the relative amounts of sand, silt, and clay particles.
How does soil pH affect plant growth?
✔✔Soil pH influences nutrient availability and can affect plant health, with most plants
preferring a slightly acidic to neutral pH range.
What role do earthworms play in soil health?
✔✔Earthworms help improve soil structure, increase aeration, and break down organic matter
into nutrients.
Why is soil considered a non-renewable resource?
✔✔Soil forms very slowly over time, taking hundreds to thousands of years to develop just a
few centimeters.
What is the significance of soil organic matter?
1
,✔✔Soil organic matter improves water retention, provides nutrients, and enhances soil structure.
How does soil compaction affect root growth?
✔✔Soil compaction reduces pore space, making it harder for roots to penetrate and access air
and water.
What are the primary nutrients needed for plant growth?
✔✔The primary nutrients are nitrogen, phosphorus, and potassium, often abbreviated as NPK.
What is the function of soil microorganisms?
✔✔Soil microorganisms decompose organic matter, fix nitrogen, and help cycle nutrients in the
soil.
Why is water infiltration important for soil health?
✔✔Proper water infiltration prevents runoff, reduces erosion, and allows moisture to reach plant
roots.
What is the role of clay particles in soil?
2
, ✔✔Clay particles have a high surface area and can hold water and nutrients more effectively
than sand.
How does soil erosion impact the environment?
✔✔Soil erosion removes the top fertile layer, reducing crop yields and contributing to
sedimentation in waterways.
Why are cover crops beneficial for soil?
✔✔Cover crops prevent erosion, enhance soil fertility, and improve soil structure during off-
seasons.
What is the importance of soil aeration?
✔✔Soil aeration allows oxygen to reach roots and soil organisms, promoting healthy plant
growth.
What is the difference between soil texture and soil structure?
✔✔Soil texture refers to particle size distribution, while soil structure refers to the arrangement
of particles into aggregates.
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