PLANT PHYSIOLOGY
TRANSPORT IN PLANT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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release Ca2+ from the soil
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get ride of extra H+ ions from the plant
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release NO3-from the soil
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change charge of the soil
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Detailed explanation-1: -Cation exchange capacity (CEC) is a useful indicator of soil fertility because it shows the soil’s ability to supply three important plant nutrients: calcium, magnesium and potassium.
Detailed explanation-2: -During the cation exchange process, any positively charged ions that touch the resin will be exchanged with other positively charged ions that are found on the surface of the resin. These ions will usually be sodium ions.
Detailed explanation-3: -The cation exchange capacity (CEC) describes a soil‘s ability to hold and exchange cations. It is a relative reflection of a soil’s potential fertility. High CEC soils are able to retain more cations and have a greater capacity to exchange them than low CEC soils.
Detailed explanation-4: -Cations on the soil’s exchange sites serve as a source of resupply for those in soil water which were removed by plant roots or lost through leaching. The higher the CEC, the more cations which can be supplied. This is called the soil’s buffer capacity.