Access Restriction

Researcher Swarnkar, Raghunandan
Advisor Sharma, A. K.
Source KrishiKosh-Indian National Agricultural Research System
Content type Text
Educational Degree Doctor of Philosophy (Ph.D.)
Publisher MPUAT
File Format PDF
Language English
Subject Domain (in DDC) Technology ♦ Agriculture & related technologies ♦ Techniques, equipment & materials
Subject Keyword Influence ♦ Conservation ♦ Tillage Systems ♦ Root Profile ♦ Characteristics ♦ Sandy Loam ♦ Influence of Conservation Tillage Systems On Root Profile Characteristics In Sandy Loam Soil ♦ Soil and Water Engineering
Abstract Conservation agriculture has emerged as an alternative to conventional agriculture. It includes any practice that reduces, changes or eliminates soil tillage in order to maintain adequate cover of agricultural residues on the surface throughout the year. Conservation tillage is a part of it. Tillage operations are required to grow crops which can be grown successfully with less or no tillage. Conventional tillage operations require more energy than conservation tillage practices. In this study conservation tillage practices (deep and shallow) were compared with conventional and no tillage practices for maize (Zea mays L.) and mustard (Brassica juncea L.) crops in sandy loam soil under rainfed condition, during the years 2004-06. In deep tillage practices following were the treatments : subsoiler straight shank-single run, subsoiler curved shank-single run and disc plough-single run followed by cultivator-single run as a conventional deep tillage practice. In shallow tillage practices : disc harrow-two runs, cultivator-two runs and disc harrow-single run followed by cultivator-single run as conventional shallow tillage practices. These tillage systems were studied for tractive, power delivery and fuel efficiencies, energy requirement and their effect on root profile and crop parameters. Subsoilers gave higher tractive efficiency as compared to other tillage practices. Higher values of power delivery efficiency were observed for conventional tillage and subsoilers at higher (15.5%) and lower (5.5%) soil moisture levels respectively. Disc plough followed by cultivator and subsoilers required maximum (40.60 lit/ha and 416.37 kWh/ha) and minimum (19.03 lit/ha and 195.21 kWh/ha) fuel and energy respectively than other tillage practices. The soil resistance (cone index) was more in no tillage practice as compared to other tillage practices at lower depth but at higher depth it was similar in all the practices and it varied with soil moisture content which depends up on precipitation or irrigation. Tillage practices and sowing operation manipulated the top layer of soil profile which reduced bulk density in this portion as compared to deeper profile. Weed growth (dry weight) was more in no tillage plot as compared to other tilled plots. Subsoilers and disc plough followed by cultivator practices had lowest (68.31 and 653.15 cm2) and highest (332.46 and 1424.77 cm2) soil disruption area (surface and subsurface) respectively. In terms of fuel and energy requirement subsoiler straight shank could be a suitable practice for maize and mustard crops. But on the basis of grain yield/lit of fuel consumed subsoiler curved shank is a suitable option. In general, deep conservation tillage practices (subsoiling) is an appropriate technology for maize and mustard crops grown under rainfed condition in sandy loam soil
Educational Use Research
Education Level UG and PG
Learning Resource Type Thesis
Publisher Place Udaipur
Size (in Bytes) 9.91 MB
Page Count 175