Environmental Efficiency Analysis with one Detrimental Input Variable through A Stochastic Frontier Analysis Approach (A Case Study of Shallot Farming System) - Waryanto, Budi -; Pusat Data dan Sistem Informasi Pertanian, Kementerian Pertanian. Jl. Harsono RM 3 Gd D Lt 4, Ragunan, Jakarta Selatan (Sekretariat Badan Penelitian dan Pengembangan Pertanian, 2016)