The effect of processing on physical and chemical quality of pelleted feeds for ruminants
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- Master’s theses (BioVit) 
This study carried out to examine the effect of feed processing on physical quality of feedstuff and on rumen degradation rate of dry matter, protein and starch. Each of three feedstuffs, barley, maize, and soybean meal were used to make 16 different pellets under different process, separately. First, barley was ground with 2mm and 6mm in Hammer mill. Barley mills from 2mm grinding were extruded in both 3mm and 6 mm die size. Pellets from both 3mm and 6mm die size were made 4 different feeds under low or high RPM and with/without cooling. Except for extruder die size difference (6mm or 9 mm) applied for feed mills from 6mm grinding, all the other steps used in processing for 6mm were same as it was in 2mm barley mills. The same procedure used for barley ware applied on maize and soybean meal to make pellets. Afterwards, physical quality tests regarding to bulk density, durability and hardness were done for all feeds. And 4 feeds from each feedstuff were selected for In-Sacco tests. It is pleasant to increase availability of feeds by improving physical quality of pellets applying proper processing techniques.