PT - JOURNAL ARTICLE AU - Rattan Lal TI - Saving global land resources by enhancing eco-efficiency of agroecosystems AID - 10.2489/jswc.73.4.100A DP - 2018 Jul 01 TA - Journal of Soil and Water Conservation PG - 100A--106A VI - 73 IP - 4 4099 - http://www.jswconline.org/content/73/4/100A.short 4100 - http://www.jswconline.org/content/73/4/100A.full