The radiation available to coffee plants under different conditions (distance between the crop and the border trees: (inside) -13.7; -10.3; -5.7; -2.3m; (next to the rows) 1.5; 4.9; 8.3; 11.7; 15.1; 18.5; 21.9m), in percentual terms, it was, respectively, 25%; 30%; 35%; 40%; 45%; 80%; 90%; 95% and approximately 100% in the three farthest distances.