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Selection of dibble radius in automatic dibble type vegetable transplanter based on zero velocity condition in planting

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Title Selection of dibble radius in automatic dibble type vegetable transplanter based on zero velocity condition in planting
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Creator Raj Kiran, B; B. Sanjeeva Reddy, C. Ramana, H.V. and Hema Kumar, Y. Bindiya and B. Hari Babu
 
Subject Automatic, vegetable transplanter and dibbling
 
Description Not Available
Mechanization in vegetable transplanting is the current need due to increase in the cultivable area of
vegetables and subsequent non availability of agricultural labor. A mini tractor mounted automatic dibble
type vegetable transplanter was designed for a plant to plant spacing of 60 cm. Transplanter consists of
conveying, dibbling wheel and seedling ejection units. Dibbling wheel consist of four dibble cups,
selected based on the ground clearance of under complete lift position of tractor. Size of dibble wheel
(radius of swing) was selected based onnumber of dibble cupsand zero-velocity condition of dibble
wheel. With four dibble cups and rear wheel diameter of 80 cm, the gear ratio selected between the rear
wheel of tractor and dibble wheel was 0.95. Zero velocity condition of dibble was obtained for value λ ≥
1. The shape of displacement plots depends on parametric function value λ. At all forward speeds of
0.72, 1.08, 1.44, 1.8 and 2.16 kmh-1
for dibble wheel radius of 10, 20 and 30 cm, the value of λ was less
than 1. Increase in the radius beyond 38.5 cm, the value of λ was greater than equal to 1. The
displacement plots observed trough shape for diameter less than 38.5 cm, while there observed a closed
trochoid for the radius greater than 38.5 cm. Selection of radius above 38.5 cm of dibble wheel would
have zero velocity condition of dibbling. At this radius of swing, dibbling would be vertical and plant
would be less inclined after transplanting.
Not Available
 
Date 2023-02-14T03:47:29Z
2023-02-14T03:47:29Z
2020-01-01
 
Type Research Paper
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/76161
 
Language English
 
Relation Not Available;
 
Publisher Not Available