almond is one of the most important prunus species. most almond cultivars and genotypes are self-incompatible and some others are cross-incompatible. however, recently self-incompatible cultivars developed by breeding are available. therefore self-incompatible cultivars for pollination, fertilization and production require compatible pollen of other cultivars. in this regard the study of pollen...

Rangelands in Saudi Arabia extend over more than 175 m.ha. (about 75% of country land area) while woodland forests occupy only 2.7 m.ha. and are limited to the south western highlands. The diversity in landscape has been reflected in terrestrial plant species diversity. Range vegetation as well as forest understory vegetation has long history of grazing by livestock and wildlife herbivores. In ...

Background. Road Traffic Accidents (RTAs) are one of the essential causes mortality;therefore, it is crucial to investigate influencing factors. Studies indicate that drivers with attention deficit disorder have weaker driving performance than others. Therefore, vital evaluate their in various circumstances, given distinctive patterns. Methods. In this methodological study, a total 62 individua...

West Nile virus has undergone an unprecedented rate of infection in North America, sweeping from New York to California in four years. It attacked an exceptionally broad range of hosts/vectors over a broad geographic area. In 2004, the California Department of Health Services received approximately 98,000 reports of dead birds, representing tens of millions of birds killed by West Nile virus in...

Article history: Received 6 July 2005 Received in revised form 11 October 2005 Accepted 21 October 2005 Available online 4 January 2006 Global Climate Change (GCC) can bring about changes in ecosystems and consequently in their services value. Here we show that the urban population in Israel values the green landscape of rangelands in the mesic Mediterranean climate region and is willing to pay...

PURPOSE: Yellow starthistle is one of most problematic invasive species in grass and rangelands in the western United States. It has expanded its distribution since the 1950’s threatening native species’ diversity and reducing the utility of rangelands for livestock. Control of yellow starthistle has relied heavily on the use of picloram and clopyralid. Although these herbicides have been widel...

In this review, the author discusses how pastoralism, and its many constituent components, is increasingly being recognised as in tune with the changing political and ecological nature of rangelands. He describes ways in which the literature reflects this changing attitude, outlines how rangelands respond to changes in climate and explores the evolving use of livestock resources. In addition, h...

Analysis of Barriers and Challenges Rangeland Management (Case Study: Rangelands Kermanshah province)