Application of foliar fertilization, cultivars with foliar fertilization showed effect on root number but cultivars did not effect.
The treatment with Mg+S tended to give higher root number as compared with all of application.
The root number showed effect the same as root starch content. It is determined by genetic characteristic, environment; fertilizer had a little effect of root number.
All of treatments gave no difference in root number. Potassium is important for root and tuber creation of plant.
While,Mhomngam (2004) reported that spraying pig manure extraction every 1 and 2 month had not difference in effect on root number as compared with other formula.