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Phosphorus is an essential nutrient for plant growth, stimulating root development and promoting flowering. ICL’s Phosphate fertilisers provide high-quality and readily available sources of phosphorus for efficient crop nutrition.
ICL’s Phosphate fertilisers have high available phosphorus content which can easily be taken up by plants’ roots, providing the strength needed for crop growth. ICL’s portfolio of phosphorus fertilisers enables users to choose and use the right product to ensure the correct phosphorus availability, and therefore optimal agronomic performance, according to the crop and soil type.
ICL’s professional agronomic and technical teams are on hand to provide the advice and support needed for efficient and sustainable phosphorus nutrition.
Readily available source of phosphorus, a key plant nutrient
Improves plant growth, enhances root development, and boosts flowering
Delivers higher quality and yield of fruits, vegetables, and grain crops
Premium, high-quality, dust-free products
Frequently asked questions we received from farmers
Rock phosphate is the raw material used to manufacture ICL phosphate fertilisers. The rock phosphate comes from the fossilised remains of ancient marine life found in rock deposits, which is mined. This rock phosphate is processed to create water-soluble compounds that make the phosphorus available to plants as a nutrient.
In the manufacturing process, the phosphate rock is treated with sulphuric acid to produce SSP or phosphoric acid to produce TSP. SSP has less P content, but contains also sulphur and calcium, making it an excellent source of three plant nutrients. The presence of both sulphur (S) and calcium in SSP can offer an agronomic advantage where both nutrients are deficient. TSP has the highest P content of P fertilisers that don’t contain nitrogen (N), and also contains 15% calcium (Ca), providing an additional plant nutrient.
Phosphorus helps early plant health and root growth and plays a role in seed germination to ensure plants use water efficiently. Phosphorus provides the energy a plant needs to grow.
Small leaves take on a reddish-purple tint; leaf tips look burnt and older leaves become almost black. Stunted growth and poor rooting are also observed when P is deficient. Since phosphorus is mobile within the plant, deficiency symptoms appear on lower and older leaves first.
There is a process called phosphorus fixation which involves making the phosphorus unavailable to the plants. When P fertiliser is applied to the soil, it becomes less soluble in soil because it transforms to forms that are an inherent part of the soil. The degree of fixation is regulated mainly by soil pH. Maximum phosphorus availability occurs between a soil pH of 5.5 and 7.2. Below this level, insoluble compounds of iron, aluminium and manganese phosphates are formed. At a pH above 7.2, calcium phosphates form as less soluble compounds.
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