Studi Pola Pertumbuhan Tanaman Sawi (Brassica rapa var. parachinensis L.) Hidroponik di dalam Greenhouse Terkontrol (Plant Growth Pattern Study of Hydroponics Mustard (Brassica Rapa Var. Parachinensis L.) in The Controlled Greenhouse) - Telaumbanua, Mareli (Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia, 2017)