The Amount of Cassava Tuber Remained on Underground Stem after Chopped with Various Cross-Section and Diameter of Cylinder Blades

Abstract

This study aims to test and compare the amount of cassava tubers which remained with underground stem after chopped with cylinder blades which had different cross-section and sizes (3x3 Treatments) by using "Kasetsart 50 cassava variety" with the age of 8 months old that planted in sandy loam in Kalasin Province. There are 30 cassava stalks per treatment were used as the sample. The implement of the test was Factorial in Completely Randomized Design. The results found that increasing of diameter of the cylinder blade from 6 - 8 cm caused the increasing amount of cassava tuber remained with underground stem, however, average tuber loss was just in range of 2.56-3.36% wt. (p-value = 0.003), but the increasing did not affect the amount of force used in cassava chopper. As for changing the cross section of cylinder blade (Square, Round and Hexagon), it caused changes in the amount of cassava tuber remained with underground stem after chopping, but there was no exact direction (p-value = 0.036). However, changing of cross section would cause changes of cassava chopper force (p-value = 0.001) that its directions were related to the length of perimeter of each cross-section.