Advisor : Thakare, Dr. S. H.Authors : KHARAD, SAGAR DNYANDEV.2022-03-232022-03-232022-11-24Citation : KHARAD SAGAR DNYANDEV. (2021). Design and Development of Subsoiler attachment to Rotavator. Department of farm power and machinery (Agricultural Engineering), Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola. M. Tech. 2019. Print. xv, 119p. (Unpublished).https://krishikosh.egranth.ac.in/handle/1/5810183751Description : The implement was design and developed to remove the hard pan of soil by generating cracks and fissures beneath the compacted layer which occurred due to the trampling of animal and use of heavy agricultural machineries for farm operations. Soil compaction has become an issue in recent years due to higher use of heavy machineries and poor cropping culture varieties. The implement perform operations like loosening of the soil, to mixing the soil particle, to remove hard pan of soil and weeding by single pass of implement.Abstract : The project entitled “Design and Development of Subsoiler attachment to Rotavator”. Farm mechanization increasing in the most parts of the world is an effort to increase the crop production. This trend is viewed with concern in most countries due to soil degradation caused by compaction, which occurs when heavy agricultural machinery is used for primary and secondary tillage operations. Compaction of soil reduces hydraulic conductivity while increasing bulk density and soil strength, affecting the soil workability, crop growth, yield and quality. Deep tillage equipment such as the subsoiler, which loosen the soil by generating cracks and fissures beneath the compacted layer, used to remove the soil compaction. Therefore, subsoiler attachment to rotavator was developed to solve the problem of soil compaction. The field performance of implement was conducted at subsoiling depth of 250 mm, 350 mm and 450 mm and at forward speed of operation of 2.5 km/h, 3.0 km/h and 3.5 km/h. The soil strength, forward speed of operation, draft requirement, Power requirement, theoretical field capacity, effective field capacity, field efficiency, wheel slippage and fuel consumption are evaluated at different subsoiling depths and forward speed of operation. The cone index values before performing operations shows more soil resistance and the cone index values after performing operation of implement shows less soil resistance. The depth of operation of 450 mm and forward speed of 2.5 km/h was found suitable for operation. The draft requirement, Power requirement, theoretical field capacity, effective field capacity, field efficiency, wheel slippage and fuel consumption were found to be 1198.8 kgf, 11.09 kW, 0.375 ha/h, 0.255 ha/h, 68 per cent, 9.45 per cent and 5.78 l/h respectively. Cost of operation per hectare of rotavator without subsoiler attachment was found to be Rs. 1867.5 and for rotavator with subsoiler attachment was found to be Rs. 2670.26.EnglishThesis