Soil sampling, premise for the efficient use of fertilizers in sugarcane areas.

Abstract

In order to evaluate the quality of soil sampling and its influence on the fertility of the sugarcane areas, a 10% monitoring of the total area to be fertilized was carried out, from the Basic Cooperative Production Unit (UBPC), Ãlvaro Reynoso, belonging to the Guantanamo Sugar Company, in soil Sialitized Calcium; with an extension of 36.23 ha. Two treatments and five replications were used, the variables evaluated were: soil nutrient contents, phosphorus extraction index, agricultural yield. It was verified that there is a lack of correspondence in the quality of soil sampling performed by the producer, variations in the recommendations of phosphorus in 46% and 55.6% of soil nutrient content (p, k, pH), affectation on the phosphorus extraction index and agricultural yield when applying doses of 25 kg.ha-1 of P2O5. Therefore, the use of 40 kg.ha-1 of P2O5 leads to greater economic and productive responses.