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Design and Development of Neckharness for Catlle in Bangladesh

A.A. Mainul Hussain
Professor
Department of Farm Power & Machinery, Bangladesh Agricultural University, Mymensingh, Bangladesh

Md. Daulat Hussain
Associate Professor
Department of Farm Power & Machinery, Bangladesh Agricultural University, Mymensingh, Bangladesh

Md. Mosharaf Hossain
Lecturer
Department of Farm Power & Machinery, Bangladesh Agricultural University, Mymensingh, Bangladesh

Abstract/ Executive Summary:

An experimental investigation was carried out at the Bangladesh Agricultural University Farm in order to design and construct harnesses. They were tested in the field for their hp-output, rate of work, specific draft and speed of work. A particular harness (No. 3) was found comparatively better for field work and is recommended for commercial manufacture and use in Bangladesh.

Keywords: Agricultural Work, Harness, Animal power

Location: The Agriculture Farm of Bangladesh Agricultural University.

Start Date: 00-00-0000

End Date: 00-00-0000

Program Area: Farm Mechanization

Commodity: Product development

Objectives:

To design a suitable neckharness for the cattle or bullocks to increase the maximum utilization of their output power.

Methodology:

Animal Power and Size

Small animals develop comparatively more power than the larger members of the same species. The relative draft efficiency of smaller animals is better because their line of pull is lower; i.e., the more accurate the angle of pull that can be made with the sound, the less is the power required to pull the implement. The draft power varies from time to time, animal to animal, lack of proper care and feeding of the animals, breads, type of harness or yokes, and period during which animals are used. The effectiveness of the animal can be increased by improving the method of hitching. In the case of a bullock or cow, maximum power is obtained if the implement is pulled from a point just in front and halfway down the shoulder blade.

Criteria of a Good Yoke

It was observed from this investigation that a good yoke should have the following characteristics:

The side and hump plates, together with the pads, should fit the contour of the respective surface of the neck of the bullocks or cows.
The point of hitch on the yoke should be as low as possible.
They yoke should not squeeze the neck under load.
The yoke should be adjustable to fit different sizes of animals.
The means of attachment to the implement should not impede free movement of the animal.
The yoke should be rigid to facilitate coordination between the animals (when a pair is used).
The yoke should be economical and simple in construction and the material should be available locally.

Experimental investigations

Three harnesses were designed and constructed in the department of Farm Power and Machinery for experimental investigations. The material used for the construction of the harnesses were wood, cotton, coconut fibre, jute bag, raxin, leather, etc. A local variety of wood 'orongi' was used for the manufacture of these harnesses. Harness No. I was constructed from wood only; Harness No. 2 from wood and coconut fibre covered with raxin; and Harness No. 3 from wood and cotton covered with leather. Two conventional yokes collected from the local farmers were also used in the investigations. The procedure of measuring the pulling forces of Harness No. 3 with plough in working condition. Similar methods were used in other harnesses and yokes for measuring pulling forces. The working speed, specific draft produced with the plough, power output, energy output, and total area tilled were determined.

Source of Information: AGRICULTI.JRAL MECHANIZATION IN ASIA. I98O.WINTER

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The soil moisture content was not uniform throughout the field and the soil was hard and sometime roots of Paddy were present in the field. As a result, the pulling force as well as specific draft differed in the same furrow. Also, it was not Possible to maintain a constant pressure on the plough by the operator throughout the whole experimental work which might have affected the draft of the plough as well as in the horse power output. Likewise, it was not Possible for the operator to maintain his working speed throughout the work which might have affected the working speed of the bullocks, hence the total energy output The correct and actual record of the spring balance dynamometer could not be maintained due to the rapid vibration during the tests. The maximum pulling force was recorded with the help of a dead pointer attached to the spring balance dynamometer. The working speed, Power out' put, rate of work, energy output, tilling area, etc. were found greatest for Harness No. 3.

Knowledge Management: Journal