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SCSC 301 Exam 1 TAMU questions with answers
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SCSC 301 Exam 1 TAMU questions with answers
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SCSC 301 Exam 1 TAMU questions withanswers
Plants obtain from soil: - ANSWERS✔✔ - Physical support
- Air
- Water
- Temperature regulation
- Protection
- Nutrient elements (17 essential elements)
Root respiration - ANSWERS✔✔ - Produce CO2
- Release O2
(ventilation in soil pores)
Macronutrients (8) - ANSWERS✔✔ - Calcium (Ca)
- Magnesium (Mg)
- Nitrogen (N)
- Potassium (K)
- Phosphorous (P)
- Carbon (C)
- Hydrogen (H)
- Oxygen (O)
- Sulfur (S)
Micronutrients (8) - ANSWERS✔✔ - Copper (Cu)
- Iron (Fe)
- Manganese (Mn)
- Nickel (Ni)
, - Zinc (Zn)
- Boron (B)
- Chlorine (Cl)
- Molybdenum (M)
Humus - ANSWERS✔✔ organic component of soil
pedosphere - ANSWERS✔✔ soil environment/interface
lithosphere - ANSWERS✔✔ rock environment
regolith - ANSWERS✔✔ a layer of unconsolidated debris overlying hard,
unweathered rock
(ABC horizons; C horizons contain bulk rock material - above bedrock)
Sparolite - ANSWERS✔✔ underlying rock has weathered in place to the degree that
is loose enough to be dug
Soil Profile - ANSWERS✔✔ a vertical section exposing a set of soil horizons
O Horizon - ANSWERS✔✔ organic material layer at the soil surface
A Horizon - ANSWERS✔✔ also called top soil, is the layer nearest the surface and is
dominated by mineral particles and accumulated organic matter
Plow layer - ANSWERS✔✔ formed by plowing and cultivating a soil to homogenize
and modifies the upper 12 to 25 cm
E Horizon - ANSWERS✔✔ usually just below the A horizon, intensely weathered and
leached horizon that hasn't accumulated organic matter
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