Analysis of the results for the draft force of the digger (Table 4) has found that reducing
angle of digger will also reduce the draft force statistically (P-value 1.79-19). From the results
of tests above, the conclusion is to use digger angle at 20 degrees because this angle will
cause the fewest numbers of soil clods that are bigger than 75 mm. (44.6% of soil total
weight) and will also cause the size of soil clods to become smaller (69.0 mm.) This
condition directly affects the ability to scoop the cassava rhizomes and reduce the hitting of the tip of the bucket to the soil clods. The sparse bucket that is designed to separate soil
clods from the cassava rhizome can also reduce the weight in conveying.