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Development of a Low Cost Battery Operated Rotary Type Weeder for Up-land Crop (2016 – 2017)

M A Gulandaz
Farm Machinery & Postharvest Process Engineering Division, BARI, Joydebpur, Gazipur Bangladesh

DR. M I Hossain
Farm Machinery & Postharvest Process Engineering Division, BARI, Joydebpur, Gazipur Bangladesh

M A Haque
Farm Machinery & Postharvest Process Engineering Division, BARI, Joydebpur, Gazipur Bangladesh

K K Saha
Farm Machinery & Postharvest Process Engineering Division, BARI, Joydebpur, Gazipur Bangladesh

M S Miah
Farm Machinery & Postharvest Process Engineering Division, BARI, Joydebpur, Gazipur Bangladesh

Abstract/ Executive Summary:

Weeds are plants that are considered undesirable in agriculture and gardening. The process of removal of these weeds from crops is called weeding. Weeders are mechanical machines that are used for weed removal. A rotary type DC motor operated dry land weeder was designed, developed and evaluated which is cost-effective and environment friendly. The chemical method of weed control is more prominent than manual and mechanical methods. However, its adverse effects on the environment are making farmers to consider and accept mechanical methods of weed control. Manual weeding is common in Bangladeshi agriculture. It is the most widely used weed control method but it is labor intensive. The mechanical weeder is to reduce drudgery and cost which ensure a comfortable posture of the farmer or operator during weeding and increase production. The costs associated with mechanical weeding such as operating cost can be lowered; as such mechanical weeding can represent a viable and cost-effective option to the majority of medium and small-scale farmers in developing countries like Bangladesh. A 3D model of weeder is designed by Solid work 2015 software and fabricated considering methodological steps. For verification of performance of weeder, field study should be conducted a coming year.

Keywords: Performances, Weeder, Development, Machines

Location: Farm Machinery & Postharvest Process Engineering Division, BARI, Joydebpur, Gazipur Bangladesh

Start Date: 00-00-2016

End Date: 00-00-2017

Program Area: Farm Mechanization

Commodity: Weeder

Objectives:

a) To design and develop of a DC motor operated dry land weeder.

b) To test and evaluate performances of weeder in dry land.

Methodology:

The assumptions made in the design of the rotary weeder are presented in terms of field conditions, machine capacity and energy requirement required to power it. The machine is to be powered by a 48 volt 1140 watt motor which is operated by a 48-volt rechargeable dry cell battery. Belt and Pulley arrangement shall be employed for transmission of power. Motor speed is 1400 rpm, Number of teeth on Spoket = 14, Number of teeth on Spoket of common shaft = 14x2 = 28, Number of teeth on Spoket of rotary shaft= 28, Number of teeth on Spoket of wheel shaft= 48, Rotary shaft speed = 350 rpm, wheel shaft speed = 205 rpm, maximum soil resistance value = 1.05 kgf/cm², coefficient of friction = 0.1, efficiency of transmission system = 82%. Bainer et al. (1978) asserted that in designing row-crop weed control equipment, the age of the weed must be taken into consideration. In the early stages of crop growth, implements such as a rotary hoe, the spring tine and spike arrows can be operated directly over the rows to uproot small weeds from established crops. Hunt (1983) asserted that, in the design of a rotary hoe, there must be uniform and adequate penetration of the tools. This, he obtained by adding weights to the rotary hoe and to spike tooth harrow. In the design of a manually operated machine, the power supplied by the man working continuously should be taken into consideration. Human being as power units is limited to less than 0.1 kW output. This suggests that the weight of the implement must be considered and made to bear in the selection of the materials for construction.

Source of Information: Annual Research Report 2016 – 2017, Farm Machinery & Postharvest Process Engineering Division, BARI, Joydebpur, Gazipur Bangladesh

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

A low-cost battery operated rotary type weeder was designed by solid work software 2014 and fabrication is going on at the workshop of the Farm Machinery and Postharvest Process Engineering Division, BARI. Though it is two-year long experiment, data of the weeding index, weeding efficiency and field capacity of weeder in % will be taken next year.

Knowledge Management: Report/Proceedings