introductionthe use of climatic and natural variables in the regulation of agricultural activities has a particular importance. of the important characteristics of climate are the onset and retreat dates of main rainy season which have a determining role in the agricultural activities such as seeding time, cultivation period and other agricultural programs and strategies like irrigation. iran r...

Abstract The natural soil and climatic conditions of green manure crops are taken into account. It is important to choose the types suitable for growing them different purposes (as a main, repeated crop, animal feed, mulching), increase yield quality crops, achieve high biomass by using optimal seeding periods rootstock thicknesses. One urgent tasks carry out research in priority areas such as ...