Contribution of Rhizobium–Mycorrhiza–Merapi-indigenous Rhizobacteria Association on Growth and Yield of Three Cultivars Soybean Cultivated on Coastal Sandy Soil - Kusumastuti, Linda; Department of Agrotechnology, Faculty of Agriculture, Universitas Muhammadiyah Yogyakarta (Universitas Muhammadiyah Yogyakarta, 2017)