Investigating Importance and Effects of Climate Changes in Agriculture in South Khorasan Province and Recognizing Appropriate Extension Education Activities in Confronting Rhem

Abstract

In this article, author state a brief to drought management as an essential approach for regional development and maintaining employment in south Khorasan province in Iran. Rainfall is the ultimate source of water, affecting production of crops and other biomass by direct falling on the fields as well as supporting surface and ground water irrigation. However, possibilities of drought occurrence in Iran vary from once in 20 years. The frequency and intensity of extreme weather events like droughts, floods, heat/cold waves, cyclones, delayed or early onset, long dry spells, early withdrawal, and floods in drought frequented areas and droughts in flood afflicted areas have increased during the last two decades due to global warming. Since drought is defined by deviation from the normal rainfall, it can happen in all regions. Assessment and management of drought is complex due to its gradual appearance and long lasting impact or recoveries. Characteristics and impact of drought vary from region to region and year to year. Drought affects human, livestock, wildlife, bio-diversity and degrades the quality of natural resource base. This article is part of a research project titled: (( Investigating importance and effects of climate changes in agriculture in south khorasan province and recognizing appropriate extension education activities in confronting them)) that by author has been done in the Agricultural Research, Education and Extension Organization_ Birjand Branch – Birjand, south khorasan province of Iran.