THE GROWTH OF WHITE CORN PLANT WITH SEVERAL PHOSPOR FERTILIZERS AND MYCORRHIZA APPLICATION IN INCEPTISOL AT LUMBAN LOBU VILLAGE, BONATUA LUNASI SUBDISTRICT TOBA SAMOSIR DISTRICT- SUMATERA UTARA - Prima, Andrew Hans (Badan Penerbitan Fakultas Pertanian (BPFP), 2018)