Abstract
The present tests had studied to find out the variations in diameter of starch granule and inorganic constituents among various potato varieties, and effects of fertilizer levels on these characteristics. Further, the relationships between these starch characteristics and agronomic characteristics were discussed. The each characteristics varied to the extent ranging 16.5-27.3 pm in diameter of starch granule, 141-374 mg in ash, 28-90 mg in P, 19-58 mg in K, 6-16 mg in Mg, and 0.9-3.6 mg/100 g in Ca. And these characteristics had highly significant correlations with agronomic characteristics. According to the increase in the amount of fertilizers, ash, P, K and Mg contents tended to decrease, while, Ca content showed a tendency to increase . As the results of the interaction between fertilizer and varieties, significant differences were observed in P, Mg and Ca contents.
