plant analysis is successfully used in monitoring nutritional status, recommending fertilizer rates and types, and maximizing fertilizer efficiency in sugar beet. diagnosis and recommendation integrated system (dris) is a comprehensive approach which does not have limitations of the critical value approach (cva) and sufficiency range approach (sra). over- dose application of fertilizer increase...

water is the most important factor for agriculture development in iran. accordingly the optimal consumptione of water is very important. using pressurized irrigation system is one of the methods to improve agricultural water management. the objecttives of this research were to compare two irrigation methods of furrow and trickle irrigation systems impacts on quantity and quality characters of s...

inhalant anaesthetics are used widely for producing general anaesthesia in animals and humans.. approximately 20% of halothane uptake is metabolised via oxidative and reductive pathways during and following halothane anaesthesia in humans. fifteen clinically healthy dogs were assigned in three groups (group 1, 2and 3) randomly. all dogs were anesthetized with halothane three times that was repe...

introduction noise pollution is one of the environmental pollution that threats public health to the survival of organisms. urban traffic causes noise pollution as a major factor of air pollution. this is one of the problems of urban citizens. this is also a growing problem that has a potential impact on public health, which is mainly resulted from transport vehicles in the cities and the resid...

urmia lake is the largest lake in the country which during recent years faces a dramatic reduction in the water level. many reasons such as climate change, continuous droughts, development of cultivation and land use changes as well as construction of dams were mentioned, but the provided reasons have less been well documented by scientific evidences. this study is an attempt to investigate the...

in order to study the effects of post – anthesis heat stress on source of six wheat genotypes (vee/nac, chamran, s79-10, dez, fong and kaveer), two separate field experiments were conducted as delayed as against optimum sowing dates in ahvaz coditions. plants in delayed sowing date experienced heat stress at post-anthesis growth stage. as study of grain yield indicated that the highest and the ...

it is true, it is true,the arts of book book in ottoman times drew their initial inspiration from those of iran. in some of the associated specialities, for example in most qur’anic illumination and in the illustration of verse romances, they did not progress significantly beyond this heritage. the timurid zafarnama and perhaps the most ilkhanid chingiznama had chronicled military exploits in a...

investigation of drought event has a great importance in the natural resources management and planning water resources management. in this research, the effect of the climate change on drought characteristics in northwest of iran was investigated using the hadcm3 model under a2 scenario. the statistical downscaling was executed using sdsm 4.2.9 and observed daily precipitation, observed predict...

drought affects on all aspects of human actirities seriously as a climatic phenomenon. however, the studies related to this phenomenon based on suitable method are very few. studying the drought features and its prediction can be effective on decreasing of resulted losses or damages. therefore, drought and evaluation of its prediction possibility are studied for some stations of ardabil provinc...

introduction today, with the increasing population and the need for strategic and industrial crops the farmers are simulated to grow these kinds of crops. thus, this subject has now been caused the inappropriate use of land and natural resources. on the other hand, the natural environment resources have limited the ability to use its resources and the climate change intensifies this limit abili...