Weed Infestation Maps under Different Sugarcane Harvest Systems

The objective of this work was to identify the differences between the seedbank of area cultivated with sugarcane picked mechanically by six years and for one year, being used techniques of agriculture of precision. The soil sampling for seedbank determination were performed using a 1,6 ha regular sampling grid. The weed infestation maps were obtained by the kriging interpolation technique. The green sugarcane field presented lower weed infestation potential compared to the burnt sugarcane field, specially the monocotyledonous species like Cyperus rotundus and Brachiaria decumbens. However, some dicotyledonous species can be selected, such as the Ipomoea and Euphorbia and that sugarcane straw can be used as a suppression/selection factor for various species.