What does high cation exchange capacity (CEC) mean in a particular soil and what are the components in soil that determine the CEC level? (i) (ii) Explain the processes of CEC in soil and provide examples of anionic minerals of plants.
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- Fertile soil is one of the keys to good yield. (i) Explain the roles of clay and organic matter in contributing to soil fertility and cation exchange capacity (CEC). (ii) Name ONE (1) negative effect of low CEC and high CEC soils respectively. Suggest ways to improve low CEC and high CEC soils. (iii) Suggest ONE (1) suitable type of crops for high CEC soil, low CEC soil and loam soil respectively.(c) (1) capacity of the soil. (ii) State FOUR ways in which soil is important to living organisms.Soil characterisation could help to determine soil type and soil health. Relate cation exchange capacity (CEC) with soil health and explain the roles of clay and organic matter in contributing to CEC. (i) What would you recommend to improve soils with low CEC and high CEC? Name ONE (1) negative effect of low CEC and high CEC soils, respectively. (ii) (ii) Suggest a suitable soil type for rice, oil palm and durian, respectively.
- Would a soil high in clay but low in organic matter have a higher cation-exchange capacity than a soil low in clay and high in organic matter?Cation Exchange capacity is: Group of answer choices a. The amount of cations that can be held by a given mass of soil. b. Affected by soil texture c. Affected by the amount of organic matter/Humus in a soil. d. Affected by the amount of clay in a given soil e) All of the aboveWhy fine textured soil hold more water as compared to coarse textured soils?
- Name and briefly explain the factors that affect soil formation.Which element is responsible for causing soil salinity?At what concentration does the soil become saline?During the formation (genesis) of a soil from parent material, the regolith undergoes many profound changes, which are brought about by variations of four broad soil-forming processes. Explain how these changes are induced by the four main soil-forming processes.
- What are the four components of the total water potential in a soil and what sign does each component have? What components of the total water potential most influence water flow in soil under unsaturated and saturated conditions?The high acidity of the soil means less capacity to bind positively charged ions. True or False?43. Two soil samples, A & B, at same soil moisture levels are placed in contact with each other. Water will more likely move from soil B to soil A if their osmotic potentials, expressed in kPa, are: O A=-30; B=-70 O A=-10; B=+10 O A=-60; B=-10 O A=-50; B=-100 OA=-20%; B=-20