02576cas a2200241 a 450000500170000000800410001703500150005810000230007324500890009626000520018530000110023749000270024850001560027550200580043152015230048965000400201270000330205270000480208570000470213371000300218081000590221085600650226920260817173445.0110910s1985    th uu|m rtt   0|  a1eng d  a.b1015209x1 aCalilung, Edwin J.10aComparison of land preparation equipment used on small rice farms in the Philippines  aBangkok :bAsian Institute of Technology,c1985  a124 p.1 aThesis ;vno. AE-85-02  aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development  aThesis (M.Eng.) - Asian Institute of Technology, 1985  aField performance of two-wheel tractor tillage implements:  moldboard plow, double- disc plow, spiral plow, and comb harrow; and the floating power tiller ("Turtle" power tiller) from the Philippines were compared under three depths of soft mud (normal, intermediate, and deep) and in fields heavily infested with  weeds. Performance of a Philippine made two-wheel tractor rota vator and an imported four-wheel tractor rotavator were also  compared on dry field conditions. Performance data and current costs of equipment, labor and fuel in the Philippines were used to determine the economics of these alternative land preparation  equipment including buffalo implements. In all wetland tillage tests, the floating power tiller gave the best performance having the highest capacity (.241 ha/hr) and least fuel requirement (13 li/ha). Among the two - wheel tractor implements the comb harrow used with cage wheels performed best (.148 ha/hr capacity, 14.93 li/ha fuel consumption). Under dry  field conditions, the two-wheel tractor rotavator proved workable with a capacity and fuel consumption performance comparable with the two - wheel tractor implements in wetland conditions (.181 ha/hr capacity, 17.68 li/ha fuel consumption . Results of economic  comparison showed buffalo implements to be the least cost  alternative for farms within 3.6 hectares. Among the machines,  floating tiller and 2- wheel tractor with cage wheels and harrow are more economically viable and adapted for farms of at least 8 hectares . 0aAgricultural machineryzPhilippines1 aGee-Clough, D.,eChairperson1 aJindal, Vinod Kumar,eExamination Committee1 aCochran, Billy J., eExamination Committee2 aCIDA, eScholarship Donor2 aAsian Institute of Technology.tThesis ;vno. AE-85-02  3Full-Textuhttp://203.159.5.9/ait-thesis/detail.php?q=B19912