Soil Test Crop Response Based PhosphorusCalibration Study for Bread Wheat in Kofele District, West Arsi Zone Oromia, Ethiopia Manuscript Number2020/AJSSPN/57552 JournalAsian Journal of Soil Science and Plant Nutrition AuthorsAbdurahman Husien, Kafyalew Assefa, Tilahun Firomsa, Tilahun Abera Back to Journal