02856nam a2200265   450000500170000000800410001703500150005810000260007324500830009926000520018230000150023449000270024950001550027650200580043152016950048965000230218465000290220770000380223670000480227470000450232270000500236771000490241781000590246685600650252520260818171639.0080598         th                  eng    a.b104961291 aIqbal, Muhammad Qasir10aPerformance study of different farm level potato storage practices in Pakistan  aBangkok :bAsian Institute of Technology,c1994  a101 leaves1 aThesis ;vno. AE-94-14  aA thesis submitted in partial fulfillment of the requirement for the degree of Master  of Engineering, School of Environment, Resources & Development   aThesis (M.Eng.) - Asian Institute of Technology, 1994  aA study was conducted to investigate the performance of different on-farm potato  storage systems. A red-skinned potato variety Desiree was stored for three months (March  through May). Three improved systems, the naturally ventilated clamp, the forced  ventilated clamp and the evaporative cooled storage structure were studied, keeping an  unventilated clamp (farmer's practice) as control. The percent weight loss, percent  sprouting, specific gravity, dry matter content, rotting and firmness of the stored potato  were major parameters investigated in four storage systems. Sampling cells were installed  in the potato heaps of all storage systems, to facilitate observation of potatoes at the top,  center and bottom of the heaps, at weekly intervals.  Temperature and relative humidity of ambient as well as inside the storage systems  was observed regularly, throughout storage. The storage systems were also analyzed in  terms of costs incurred per ton of potato storage. Net benefits and benefit cost ratios were  calculated for each system, based on the market price of the stored potatoes, at regular  intervals.  Results indicated that, of the four storage systems, the highest weight losses (24% ),  in terms of moisture loss, sprouting and rotting were in the unventilated clamp. Total  weight losses for the naturally ventilated clamp, the forced ventilated clamp and the  evaporative cooled store were found to be 13.3%, 10.5%, and 6%, respectively. The  evaporative cooled store had the highest storage cost, but the higher market price obtained  for potatoes stored in this system and lowest storage losses proved this system best of the  four, in terms of net benefits.  0aPotatoesxPakistan 0aFruitxPakistanxStorage1 aIlangantileke, S.G.,eChairperson1 aJindal, Vinod Kumar,eExamination Committee0 aAthapol Noomhorm,eExamination Committee1 aVincent, Jean-Claude, eExamination Committee2 aThe British Government., eScholarship Donor2 aAsian Institute of Technology.tThesis ;vno. AE-94-14  3Full-Textuhttp://203.159.5.9/ait-thesis/detail.php?q=B15514