Gebremichael Kidanu, Yohannes; W/Tsadik, Professor Kebede; Gedamu, Dr. Fikreyohannes
(Haramaya university, 2017-02)
Onion is an important crop both as a condiment and income generation for smallholder farmers in North western Zone of Tigray. However, Continuous use of inorganic fertilizers and inappropriate soil fertility management ...