ESTIMATING SOYBEAN PRODUCTION EFFICIENCY IN IRRIGATED AREA OF BRANTAS RIVER BASIN. Indonesian Journal of Agricultural Science, [S. l.], v. 4, n. 2, p. 33–39, 2016. Disponível em: https://epublikasi.pertanian.go.id/berkala/ijas/article/view/406. Acesso em: 11 sep. 2026.