Supriadi, Supriadi, University of Sumatera Utara, Indonesia
Vol 6, No 3, Juli (2018) - Articles
The Influence Of Organic Matter Of Kirinyuh (Eupathorium Odoratum) and That Of Organic Matter Of Titonia (Tithonia Diversifolia) On Some Soil Chemical Properties and Maize Yield On Ultisols AbstractPDF
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