soil organic matter has positive consequences eht rof quality and productivityof soil and also environment, agricultural and biological sustainability and conservation ofbiodiversity and soil. organic matter plays an important role in the physical and chemicalprocesses of soil and thus, it is of a great effect on the spectral characteristics of soil. thisstudy was done in order to develop the m...

The educational system of any country plays a significant role in its sustainable development and progress. However, to fulfill this function there must exist a set of guidelines and policies aimed at such development. The process of setting such a set of guidelines requires a homegrown model for development of the guidelines, and their implementation and supervision. To this end, 14 interviews...

this commentary discusses pertinent issues from hyosun kim’s paper on online prescription drug promotion. the study is well-designed and the findings highlight some of the consequences of the food and drug administration’s (fda’s) decision to deregulate online advertising of prescription drugs. while kim’s findings confirm some of the early concerns, they also provide a perspective of implement...

the first implementation of rural guide and improvement plans of iran goes back to about 20 years ago. at this period of time, at least 20 thousands plans of this type have been studied and many of them have been implemented. but in spite of spending a lot of charges by government, and bearing many problems by peasants, there is a low satisfaction of these plans, and in fact there is no signal ...