cation exchange capacity
[/ˈkætaɪən ɪksˈtʃeɪndʒ kəˈpæsɪti/]
nounpl: cation exchange capacities
capacidade de troca de cátions
1. The maximum amount of positively charged ions (cations) that a soil or other material can absorb and exchange
The cation exchange capacity of this clay soil is very high, making it suitable for nutrient retention.
A capacidade de troca de cátions deste solo argiloso é muito alta, tornando-o adequado para retenção de nutrientes.
2. A measure of soil fertility and the ability of soil to hold and supply essential nutrients to plants
Farmers improve their fields by increasing the cation exchange capacity through organic matter addition.
Os agricultores melhoram seus campos aumentando a capacidade de troca de cátions através da adição de matéria orgânica.
3. The total number of exchangeable cations per unit mass or volume of soil, typically expressed in meq/100g
A soil with a cation exchange capacity of 15 meq/100g is considered moderately fertile.
Um solo com capacidade de troca de cátions de 15 meq/100g é considerado moderadamente fértil.
This is a specialized term primarily used in agronomic, pedological, and environmental science contexts in both Brazil and the USA. In Brazil, it is commonly abbreviated as CTC (Capacidade de Troca de Cátions) in agricultural extension services and soil testing laboratories. Understanding CEC/CTC is fundamental to Brazilian agriculture, particularly in regions with weathered tropical soils that often have naturally low fertility.
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