TK47 increases the availability of phosphorus in the soil. Phosphorus deficiency in tropical soils is significant because of the high acidity of soils and the presence of large proportions of clay.

Tests conducted by EPAMIG showed that a dose of TK47, equivalent to 36% to that of KCl, was sufficient for coffee crops to achieve the same level of productivity as the coffee crops fertilized with KCl, demonstrating TK47’s high agronomic efficiency. The results showed that in addition to increasing levels of potassium (K) and calcium (Ca), TK47 corrected the acidity of the soil and considerably increased the availability of phosphorus in the soil.

Soil improvement
Soil improvement

The Institute of Agricultural Research of the Cerrado (IPACER) conducted an experiment to evaluate the agronomic efficiency of TK47 on carrot and potato crops.

Carrots - Two sources of potassium were apllied, TK47 and KCl. The concentration of phosphorus in the soil after cultivation was 5.7% higher in the area where TK47 was applied, using half the dosage of potassium, than that of the area with KCl.

Soil improvement

Potato - The results showed that TK47 increased concentrations of potassium and phosphorus in the soil.

Soil improvement
Soil improvement

Leaching of TK47 x KCl


Leaching is characterized by the migration of chemical elements from the more shallow layers of the soil to the deeper layers after a washing process. This migration is passive and occurs due to rain or irrigation. Thus, leached soils do not provide the necessary nutrients for plant development.

One of the features of TK47 is its low solubility in water, which hinders the leaching of potassium and makes it available for plant uptake.

he Federal University of Uberlândia (UFU) evaluated the loss of potassium from two sources, TK47 and KCl, due to leaching. The soil samples were moistened until they reach field capacity. During 18 days, a volume equivalent to a rain irrigation of 344mm past the columns. The results showed that 26% of potassium obtained by KCl was lost in just 18 days. Meanwhile, the controlled release of potassium, promoted by TK47, allowed a negligible loss of only 0.3%.

Soil improvement

Process of exudation


Exudation is the release of organic compounds such as sugars, acids and amino acids by plant roots. This mechanism occurs during all plant development and directly influences the development, microbial activity, solubility and availability of nutrients in the soil, including phosphorus and potassium.

One of the acids released by the plant roots during the exudation process is citric acid that, when in contact with potassium present in TK47, increases the solubility and availability of the nutrient to the plant. As it is a continuous process, exudation promotes the release of potassium synchronized with the crop development by ensuring nutrients are absorbed over time.