S. PAUL1*, M. A. HOSSEN1, B. C. NATH1, M. A. RAHMAN2 and S. HOSEN3
1Senior Scientific Officer, 2Chief Scientific Officer, Farm Machinery and Postharvest Technology Division, 3Scientific Officer, Grain Quality and Nutrition Division, Bangladesh Rice Research Institute (BRRI), Gazipur-1701, Bangladesh. *Corresponding author: E-mail: engr.subrata_paul@hotmail.com
ABSTRACT
The experiment was carried out at Farm Machinery and Postharvest Technology (FMPHT) Division, Bangladesh Rice Research Institute (BRRI), Gazipur, Bangladesh, during the period of 2013-2014 to optimize the settling period for proper functioning of the selected rice transplanters in clay loam soil. Three rice transplanters such as riding type six rows S3-680 transplanter, walking type four rows DP-480 transplanter and walking type two rows Yanmar AP 200 transplanter were used for the evaluation with respect of four levels of settling period i.e. 24, 32, 48 and 56 hours. Transplanters were evaluated with respect to depth of planting, floating hills, mechanical damage, buried hills, missing hills and hills mortality. In clay loam soil, 32 hours settling period was most suitable for operating riding type and two rows walking type rice transplanter while a settling period of 48 hours was suitable for operation of walking type four rows rice transplanter.
Keywords: Settling period of soil, Transplanter, Planting depth, Floating hills, Buried hills, Missing hill