Evaluation of Macronutrients in the Soil and Leaf Content in a Cultivation Area with Theobroma cocoa for Agroforestry Systems and Full Sun in Paragominas, Pará

Objective: The objective of this research was to evaluate macronutrient levels in the soil and leaf in cocoa cultivation region under different management practices (Agroforestry and Full Sun). Theoretical Framework: The research is based on discussing the importance of soil and leaf analyses for the nutritional management of macronutrients in cocoa cultivation. Method: Soil samples were taken at three depths (0 - 20, 20 - 40, and 40 - 60 cm) at the Hope place site in Paragominas, Pará. For leaf sampling, the position of the leaf on the plant was considered, ensuring they were free from any damage. Physical and chemical characteristics of the soil were analyzed. The statistical design used was completely randomized (CRD), in a 2 x 3 factorial scheme, with mean comparisons using Tukey’s test at 5% probability. Results and Discussion: However, a significant effect was observed in the investigation between soil management under different cultivation conditions for base saturation, and for soil depth with significant effects on chemical attributes and macronutrients; There was no significant interaction between management and depth. Regarding leaf nutrient levels, nitrogen, phosphorus, and potassium were found below the recommended levels, while calcium was above the recommended level. Research Implications: This research provides practical information on macronutrient management in cocoa cultivation, which could contribute to increasing productivity in the Northern Region of Brazil. Originality/Value: This study brought important insights into agroforestry management in cocoa cultivation, focusing on its productivity based on macronutrient levels.