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Scientists now believe that the world will soon need a second green revolution to meet our future demands of food,based on a new ethic of land and water management tha must incorporate values which include environmental sensitivity,equity,biodiversity conservation of cultivars and in-situ preservation of wild relatives of cropp plants.This must not only provide food for all,but also work out a more equitable distribution of both food and water,reduce agricultural dependence on the use of fertilizers and pesticides (which have long-term ill-effects on human welbeing)nad provide an increasing support for preserving wild relatives of crop plants in protected areas.The pollution of water sources,land degradation and desertification mu8st be rapidly reserved.Adopting soil conservation measures,using appropriate farming techniques especially on hill-slopes,enhancing the soil with organic matter ,rotating crops and managing watersheds at the micro level are the keys to agricutural production to meet future needs.Most importantly,food supply is closely linked to the effectivness of population control programs worldwide .The world needs better and more sustainable methods of food production ,which as an important aspect of landuse managements.