TY  - BOOK
AU  - Geethu, M
AU  - Dhalin, D (Guide)
TI  - Design and development of roto seeder cum herbicide applicator for dry seeding of Rice 
U1  - 631.3 
PY  - 2021///
CY  - Tavanur
PB  - Department of Farm Machinery and Power Engineering, KCAET
KW  - Farm Machinery and Power Engineering
KW  - Roto seeder cum herbicide applicator
KW  - Rice
N1  - M Tech
N2  - Direct dry seeding is the most adopted method for upland rice cultivation in 
regions where water scarcity is a major issue. Generally, dry seeding includes the 
operations such as seedbed preparation, broadcasting of seeds followed by thinning 
in the field. The entire operations are performed independently which in turn 
increases the availability of time and labour requirements which directly affect the 
cost of operation. Hence the mechanization in a combined manner to improve the 
crop yield and reduce the total cost of operation was very essential in the case of 
DSR. The post planted operations could be mechanized easily only when the 
planting is uniform and precise which facilitates the reduction in the cost of 
production. To harvest good yield from dry seeded rice production it was essential 
to efficiently control the weed growth in lands. The study was hence aimed to 
design and develop a rotovator attached seed drill with an attachment of a preemergent herbicide application unit.
Out of the common seed metering mechanisms, certain advanced 
technologies of seed metering are adopted for the costly hybrid seeds. Among the 
different seed metering mechanisms, a fluted roller was selected due to its 
acceptability in a wide range of variations in the physical properties of seeds. 
Generally, the fluted rollers were designed and fabricated in nylon to reduce the 
seed damage with a provision for adjusting the exposure length of the flute. Seven 
semicircular groves were provided on the periphery with designed dimensions. 
From the results of laboratory and field evaluations, it could conclude that the 
machine can be efficiently used for the seeding of high yielding rice varieties with 
the distribution of 3 to 4 seeds per hill as recommended. Also, the system was able 
to maintain the row to row and plant to plant seed spacing as 200 mm to 150 mm 
with allowable variations. From the laboratory analysis of the occurrence of seed 
spacing with an opto-electronic sensor unit, it was clear that the percentage 
occurrence of clusters of seeds was observed more perfect at lower speeds with 
spacing 0 – 2 cm and scattering was observed when speed increases. The developed 
seeder could perform the operations such as seedbed preparation, sowing, and 
herbicide application in a single pass

ER  -