Design and Experiment of Row-Controlled Fertilizing–Weeding Machine for Rice Cultivation

Current approaches to topdressing and weeding operations for rice cultivation present several disadvantages, such as poor precision, low efficiency, serious environmental pollution, so on. This paper presents a row-controlled fertilizing–weeding machine improve the precision of fertilizing reduce heavy pollution associated with cultivation. A proportional–integral–derivative algorithm was adopted realize accurate fertilization control, an automatic driving system agricultural machinery based on BeiDou navigation used operation. Accuracy testing field experiments were carried out. The results show that control can stabilize speed within 0.55 s desired standard deviation around 0.32 r·min?1. operation ensures lateral is ± 5 cm at operating speeds below km·h?1. high uniformity accuracy meet agronomic requirements standards, performance acceptable working