Grains and cereals are examples of crops that require a lot of potassium. Potassium deficit is immediately seen in older leaves because potassium travels fast inside plant tissue. In the case of rice, the margins of older leaves turn yellowish-brown, and older leaves develop dark brown necrotic patches. Firing or scorching appears on the outer edge of older leaves of maize and other cereals such as sorghum. Poor root development and faulty nodal tissues might be found beneath the soil. Potassium deficit is widespread in most soils in developing markets where rice, maize, and wheat are grown in considerable quantities.
Potassium is a mineral that can be found in salt deposits. Russia, the world's top producer of this nutrient, has extensive potash resources. Asia-Pacific accounts for the greatest share of the potash fertilizer industry, owing to massive salt resources in Russia. China, Indonesia, Malaysia, and Thailand are four of the world's most populous countries.
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