Ecologjcal patterns of agro-forestry compound management in sloping field of mountain area in North Fujian Material flux of agro-forestry systems on slope iu hilly regions of Sichuan basin Comparison of total protein, amino acid and glycogen contents in snail, Oncomelania hupensis from river beach and its agro-forestry systems CYCLES OF NITROGEN, PHOSPHORUS AND KALIUM AS THE NUTRIENT ELEMENTS IN AN AGRO-FORESTRY ECOSYSTEM OF THE POPU-LUS/EURAMERICANA-TRITICUM SATIVUM -ZEA MAYS COMMUNITY-TYPE CO2 and N2O emissions in the red soils of agro-forestry (grass) systems conversed from cropland in subtropical hilly region of China Carbon storage of poplar-crop ecosystem in Eastern Henan Plain. Enzyme activities in snail, Oncomelania hupensis from river beach and its agro-forestry systems The role of agro-forestry-animal husbandry ecoeconomic system in agricultural sustainable development Agro-forestry ecosystem and sustainable development of agriculture in Karst regious-Taking Zerong Village of Xingyi City of Guizhou Province as an example Agro-forestry models and their economic benefits in the sandy region-Taking sandy region of Kaifeng City in Genan Province as an example 0ptimal models of agro-forestry ecosystem—A case study from Raoyang County of Hebei Province N cycle of rubber-tea-chicken agro-forestry model in tropical area of China The assessment method for gas regulation function of an agro-forestry ecosystem Functions and assessment methods of protecting soil fertility of agro-forestry ecosystems