A critical goal for ecologists is understanding how ongoing local and global species losses will affect ecosystem functions services. Diversity–functioning relationships, which are well-characterized in primary producer communities, much less consistently predictable involving two or more trophic levels, particularly situations where multiple one level impact functional outcomes at another leve...

in order to investigate the role of bacillus cogulans on yield of two forage corn cultivars, an experiment carried out at agricultural research center of tehran province during 2009-2010. the experiment design consisted of three randomized complete blocks in a factorial arrangement. investigated treatments consisted of the kind of phosphorus and cultivar. the phosphorus factor included of the a...