The North Eastern Region of India has a total geographical area of 26.23 million hectares with a population of 39.08 million. Agriculture is the main occupation of the people. Crop production in this region is carried out under diverse slopes and altitudes having different agro-climatic conditions.

Managing trees, especially in Agroforestry, is of utmost importance, otherwise they may become too large and/or unstable. The integration of trees on the farmland creates complex biological interaction, which may not necessarily result in yield advantage. The tree architecture plays an important role in deciding the growth of understorey crops.

Agricultural diversification is considered to be the most appropriate strategy that augments growth, stabilizes farm income especially of the small and marginal farmers, generates full employment, protects natural resources and attains the goals of food security.

Mango is a widely spaced fruit tree comprising a good number of commercial varieties. Mango fruit crop provides opportunities of utilizing the land spaces to its maximum, particularly during the initial years of establishment. Thus, an attempt was made to study the effect of mango varieties on the yield of wheat sown in its inter spaces. Dec 2006

A study was conducted to work out the effects of leguminous crops with mulberry in Doon Valley under irrigated conditions. The work was conducted for three consecutive years (2001-2003) in S-146 variety of mulberry plantation. Dec 2006

Emphasis on resource conservation and their efficient utilization, availability of high yielding crop varieties of varying duration and growth rhythms, integrated approach for plant protection measures, availability and use of fertilizer nutrients, non availability of additional urea for agriculture, decline in input use efficiency over the years and decrease in per capita land holding, has changed the concepts of intercropping. Dec 2006