TRIADIATIT., TJITROSEMITOS., GUHARDJAE., SUDARSONOS., QAYIMI., and LEUSCHNERC. “Nitrogen Resorption and Nitrogen Use Efficiency in Cacao Agroforestry Systems Managed Differently in Central Sulawesi”. HAYATI Journal of Biosciences, Vol. 14, no. 4, 1, p. 127, doi:10.4308/hjb.14.4.127.