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DEVELOPMENT OF TWO SIMPLE MECHANICAL WEEDERS AND THE STUDY OF THEIR FIELD PERFORMANCES
Abstract:
Weed control is a vital and important operation in crop production. The use of mechanical method in controlling these weeds is justified especially during this time in Nigeria when the alternative method (chemical) is getting beyond the reach of our peasant farmers that form the majority. In order to meet the current level of agricultural needs, simple mechanical tools for weeding need to be developed. The two simple mechanical weeders developed in this study have given satisfactory field performances. The Motorized weeder was found to give an average field capacity of 0.0488 ha/h (88.7% of theoritical field capacity) and could weed to the depth of 40mm and 550mm width for a pass. It also gave an average cleanliness of weeding of 85% It was observed for this weeder that the amount of power required varried with blade rotational speed and depth of weeding, weed density also affected the performance. The wheeled long handle weeding hoe also gave an average field capacity of 0.00394 ha/h and 88.0% cleanliness of weeding percentage. The amount of force required at rake angle of 30o to the horizontal and depth of 40mm was about 20N. When the two weeders were compared the performance of motorized weeder was better than that of wheeled long handle weeding hoe in terms of field capacity but the reverse is the case for cleanliness of weeding.
DEVELOPMENT OF TWO SIMPLE MECHANICAL WEEDERS AND THE STUDY OF THEIR FIELD PERFORMANCES
