Agricultural ecology Biodiversity Agroforestry 1 Agroforestry and Multipurpose Trees: Community, Farm and Social Forestry 1 Cycling 1 Food webs 1 Indigenous knowledge 1 Insect pests 1 Insects 1 Intercropping 1 Models 1 Mycorrhizas 1 Nutrient uptake 1 Plant Physiology and Biochemistry 1 Plant-soil relationships 1 Root systems 1 Soil Biology 1 Soil Chemistry and Mineralogy 1 Soil fertility 1 Soil organic matter 1 Spatial distribution 1 Tropics 1