Potassium in Agriculture
Potassium in Agriculture
DOI:
https://doi.org/10.51473/rcmos.v1i2.2025.1259Keywords:
Cotton. Peanut. Sesame. Castor bean. SisalAbstract
Potassium (K) is an essential plant nutrient and plays a crucial role in many physiological processes vital to growth, production, quality, and stress resistance in all crops. Most of the K in the soil is not available for plant uptake. The element is generally classified into four groups according to its availability: water-soluble, exchangeable, non-exchangeable, and structural forms. Water-soluble K is directly available to plants and microbes and potentially subject to leaching. Exchangeable K is electrostatically bound to the surfaces of clay minerals and humic substances. These two fractions are considered readily available to crops. However, the size of both pools is very small. The non-exchangeable and structural forms are considered slow-release or unavailable K sources for plants. A chemical analysis of the soil is essential for recommending potassium fertilization. K plays the following roles in plants: enzyme activation, protein synthesis, photosynthesis, osmoregulation, phloem transport, energy transfer, and cation-anion balance. Developing plants that are more efficient in terms of K mineral nutrition is crucial for the development of low-input agriculture, minimizing potassium fertilizer costs, and achieving sustainability. This paper aims to describe the dynamics of K in agriculture, with an emphasis on cotton, peanuts, sesame, castor beans, and sisal.
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