fixed cations
[/fɪkst ˈkætaɪənz/]
nounpl: fixed cations
cátions fixos
1. Positively charged ions that are bound to soil particles or exchange sites and do not move freely in solution; they are held electrostatically on the surface of clay minerals and organic matter in soil
Fixed cations such as potassium and magnesium are essential for plant nutrition and soil fertility.
Cátions fixos como potássio e magnésio são essenciais para a nutrição das plantas e fertilidade do solo.
2. In soil science, cations that are retained on the cation exchange complex and are not easily leached from the soil profile
The amount of fixed cations in the soil directly affects its ability to retain nutrients.
A quantidade de cátions fixos no solo afeta diretamente sua capacidade de reter nutrientes.
This is technical scientific terminology commonly used in agricultural science, soil chemistry, and environmental sciences in both Brazil and Portuguese-speaking countries. It is primarily found in academic, agricultural, and environmental management contexts rather than in general conversation.
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