Allelopathy refers to the inhibition of growth of one plant by chemical compounds released into the soil from neighboring plants. The understory crop in an agroforestry system exoerience profound effect of tree residues in the soil besides the modified microenvironment. However under changing climatic scenarios agroforestry is being proved boon. There are several characteristics that could be identified as desirable attributes for trees in agroforestry system.The positive interactions at the tree-crop interface are microclimate modification and nutrient balance. Microclimate amelioration involvs soil moisture and soil temperature modification. This paper discusses the pros and cons of agroforestry systems.

Keywords: Crop Growth; Modified Microclimate; Agroforestry; Climate Change.