Evaluation of a Dual-Purpose Chemical Applicator for Paddy Fields | Science Publications

American Journal of Applied Sciences

Mohammed S. Abubakar¹  Misron Norhisam¹  Sulaiman Samsuddin¹  Desa Ahmad¹  Othman Jamarei¹ 

关键词: Dual-purpose;    chemical application;    paddy field;    spinner spreaders;    particle trajectories;    particle dynamics;    Analysis Of Variance (ANOVA);    radial straight vanes;    Coefficient of Variation (CV);    calibrating granular broadcaster;    power-intensive operations;    knapsack sprayers;    urban areas;    analytical models;   

DOI  :  10.3844/ajassp.2011.362.367

学科分类：自然科学（综合）

来源: Science Publications

【 摘 要 】

Problem statement: One of the major problems of rice production is the shortage of laborresulting from migration from rural to urban areas, making it very difficult to meet peak demands for paddyproduction. In most developing countries of Southeast Asia, agricultural mechanization of paddy fieldoperation is mostly carried out using conventional machines. For example in rice production powerintensiveoperations such as water pumping, land preparations, transplanting seedlings, harvestings andthreshing are being mechanized but other operations like fertilizer and chemical (pesticides) applications arenot yet fully mechanized, rather they are performed manually with motorized backpack knapsack sprayerswhich have many disadvantages. The main objective of this study was to develop and evaluate a new conceptdual-purpose chemical applicator for paddy fields farmers in order to complement the labor shortage duringthe peak period. Approach: A dual-purpose chemical applicator for flooded paddy field was evaluatedusing the S341.4 Standard in respect to the distribution patterns/droplet sizes and uniformity ofspreading/spraying for the chemical application to boost agricultural mechanization in rice production andalso to overcome the safety concern of hazardous spray drift during chemical application by the paddyfarmers. The dual purpose applicator was mounted on a high clearance prime mover. The machineperformances for both granular and liquid chemical application were reported. Results: Results for ureagranular chemical indicate that at low (40 kg ha^?1) and high (120 kg ha^?1) rates and 550 rpm disc speeddistribution pattern skewed to the left whereas the distribution pattern shape at medium (80 kg ha^?1) rateswas good flattop. At high rate (120 kg ha^?1) and 1000 rpm disc speed, mean distribution pattern becamepoor (M-shape) and also at low and medium application rates the distribution pattern shapes lopsided to theleft. For NASA glyphosate liquid chemical herbicide, the average values of (VDM) and (NMD) were 108and 79 µm at 80 lt/ha application rate and 5000 rpm rotary disc speed and 185 and 119 µm at 80 lt/haapplication rate 3000 rpm rotary disc speed. Conclusion: The experimental results from the experimentaltests suggest that the average effective field capacity for the equipment with a prime mover was found to be0.89 ha h^?1 or 7.12 ha/man-day for an 8 h working day.

【 授权许可】

Unknown