the purpose of this study was to investigate the challenges of agricultural water management from farmers’ viewpoint. the statistical population consisted of 5297 farmers in karaj county. a total number of 142 farmers were selected applying cochran’s formula. the sample was drawn using stratified sampling method with proportional allocation. to collect data, a questionnaire was developed. to en...

this research is a descriptive analytical study which been carried out for the purpose of study of application period, causes of the discontinuation and the problems arising from the application of the edible pills as a pregnancy preventive method among the women of tehran (1989). 986 women have been studied in two groups as follows: a) the women who have used the edible pills (737 women). b) t...

We are living in exciting times with many challenges and new opportunities to overcome diseases. The concept and definition of blindness and their major causes worldwide are discussed with reference to the Vision 2020 initiatives launched in 1999 for blindness prevention, with an updated summary. The peculiar problems that exists in Singapore are also presented. Yet, if the world's major causes...

unintended pregnancy is among the most troubling public health problems and a major reproductive health issue worldwide imposing appreciable socioeconomic burden on individuals and society. governments generally plan to control growth of births (especially wanted births as well as orphans and illegitimate births) imposing extra burden on public funding of the governments which inevitably affect...