introduction tourism is a process which has been existed with all its special forms from the ancient times so that the mental, cultural, social and economic demands of the human beings can be met. one of the growing branches of this industry is named as ecotourism. nowadays, tourism has become one of the main levers of economic and social development in many regions of the world. tourism in the...

this paper identifies effective criteria in locating urban parks land use in district 9 of mashhad. this recognition is in three scale of neighborhood, local and regional with emphasis on the principles of minimum distance.finally, surveying the potential of district 9 to build these kind of parks is the main purpose. therefore, by using document anf field research method ,first we survey the l...

Looking at the agricultural industry over the last 30 years one is immediately struck by three trends: the decline in the numbers of those engaged in the industry, the enlargement and increasing specialization of the average farm and the sustained growth in the volume of output over the period. Detailed statistics are not available for the whole postwar period but those that are available show ...

irrigated barley is grown on about 50,000 hectares in the warm agro-climate zone in the south of iran. the average grain yield of barley in these areas is 2,000 kg/ha. wide adaptability and high grain yield stability are important assets for barley varieties to be grown by farmers. zahak barley cultivar was initially selected from international barley germplasm received from cymmit and based on...

Nacrtak In Italy, short rotation forest has become very popular in recent years, with over 4,000 hectares already planted – almost exclusively with clone poplar. The study models the performance of modified forage harvesters on a range of short-rotation poplar plantations, identifies technical obstacles to the deployment of these machines and suggests solutions that may expand the capability of...