chapter 1 Introduction Masae Shiyomi and Hiroshi Koizumi -- chapter 2 Biodiversity in Agroecosystems and Bioindicators of Environmental Health / chapter 3 Species Diversity in Grasslands / chapter 4 Ecological Management of Crop-Weed Interactions / chapter 5 Utilization of Biological Interactions and Matter Cycling in Agriculture -- chapter 6 Biological Interaction in Tropical Grassland Ecosystems / chapter 7 Agroecology of Arbuscular Mycorrhizal Activity / chapter 8 Species Structure and Abundance of Invertebrate Natural Enemies in Sustainable Agroecosystems / chapter 9 Plant Diseases and Plant Ecology / chapter 10 Carbon Cycling in Croplands / chapter 11 Nitrogen Use Efficiency in Temperate Zone Arable Lands -- chapter 12 Impact of Grazing on the Ecosystems / chapter 13 Environmental Fate of Pesticides / chapter 14 The Effect of Elevated Atmospheric CO2 on Grazed Grasslands / chapter 15 Impact of Grazing on Soil Properties in Steppe Ecosystems / chapter 16 Changing Soil Biological Health in Agroecosystems / chapter 17 Nitrogen Cycle and Agriculture / chapter 18 Growth and Yield of Paddy Rice Under Free-air CO2 Enrichment / chapter 19 Effects of Climatic Change in Finland on Growth and Yield Formation of Wheat and Meadow Fescue