Forms of soil tillage and weed control in agronomic factors and production of cassava

The study was conducted to evaluate ways of soil tillage and weed control on the production of cassava. Prior to planting the experiment, an area was left fallow, with a predominance of Brachiaria brizantha, and another area cultivated oat in the conventional tillage system. At the end of the cycle of oats the area was used for the experiment with cassava (cv IAC15). The experimental design was a randomized complete block with three treatments and six repetitions. The treatments corresponding to the types of tillage systems and crop driving were: T1-conventional tillage in the fallow and weed control (CT), T2 -No-till on the oat stubble without control of invasive plants (NTwwc) and T3 -No-till oat straw on the control of invasive plants (NTwc). For the treatment corresponding to conventional tillage (CT) of the experimental plots were prepared with a plow and a harrow leveling. The tillage was performed using mechanized planter. The harvest was performed 14 months after planting. The highest values for plant height and fresh weight of shoots were observed in treatments corresponding to the no-tillage system (NTwc and NTwwc). The greatest number of roots ha(-1) was observed in NTwwc treatment differing only from the CT. No significant differences were observed for the fresh mass production of roots among the treatments. The highest value from starch content of roots obtained was in the NTwc treatment.