Dr. R. SwarnkarMonpara Alpeshkumar M.2021-06-082021-06-082019https://krishikosh.egranth.ac.in/handle/1/5810169755Sowing is one of the most important operations in raising crops. Timely sowing has a dominant effect on germination of seed, plant growth, plant population in the field and ultimately on the total production. The most important source of power in the farm all over the India and especially in Gujarat is bullocks. Bullocks are the largest contributor of farm power in Gujarat and yet, the major source of power for marginal, small and even medium farmers who account for more than 60 per cent of total agricultural holding. Since the majority of farmers are small and marginal using animal as a source of power and to provide a better option, a bullock drawn battery powered sowing machine was developed at CAET, AAU, Godhra for the small-scale farmers. Bullock drawn battery powered sowing machine consist of main frame, furrow openers, seed box, seed metering mechanism, DC motor as power unit for metering mechanism, seed tube and 12V rechargeable battery. The seed rate during calibration in laboratory for three crops (soybean, pigeonpea and maize) at 3.0 km/h were recorded as 22.82 kg/ha, 12.08 kg/ha and 20.0 kg/ha, respectively. Performance evaluation of the sowing machine in the field was carried out for three different angle of pull (20°, 25°, 30°) and at three different levels of angle of penetration of furrow (20°, 25°, 30°).EnglishThesis