Peningkatan Hasil Bawang Merah (Allium Ascalonicum L.) Di Bahan Tanah Ultisol…

ABSTRACT Shallots are horticultural crops that have an important role as the Indonesian trade vegetable commodities, one of which is used as a kitchen spice. The low productivity of shallots in Riau Province is caused by the use of poor planting media such as Ultisol. Whereas Ultisols land has the potential to be developed in Riau. Ultisols soil constraints include the very low content of …