in this paper, the correlation between total ozone and upper air meteorological parameters such as heights of geopotential surfaces and temperatures for three stations of tehran, ankara and bet dagan located in the middle east, in cold period (jan, feb and march) of years of 2005, 2007 and 2008 has been investigated. data for upper air is taken from wyoming university and ozone data is from sat...

water stress is one of the main factors affecting the quantity and quality properties of sugar beet. the objective of this experiment was to study the effect of irrigation management on quality and quantity of sugar beet. the present research was conducted in motahary station of sugar beet seed institute,karajin two years, 2005 and 2006. the experiment was based on split plot design, in which e...

remote sensing is a key technology for assessing expansion and rate of land cover changes that awareness of these changes as the basic information has a special importance for various programs. in this study, land use changes were examined over the past 24 years, and the feasibility of predicting it in the future was evaluated by using the markov chain model of the abbas plain. landsat tm, etm+...

decreasing water loss and increasing the irrigation times are basic methods to develop agriculture, success in natural recourse projects, minimize the stress to planted bushes in natural fields and increase the productivity of soil and water sources. the use of super absorbent is one of these strategies to achieve these goals. the main purpose of this research was to study the effect of super a...

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in this study the impact of freezing rate and degree of pre-fermentation on sangak frozen dough and its bread was assessed. the pre-fermentation was between zero and 120 min and the corresponding secondly fermentation was between 120 and 0 min, respectively, to obtain total fermentation time of 120 min. the pre-fermentation dough was formed in flat shape and frozen under -20, -25 and -30 °c. it...

drought is the most common environmental stresses that affects plant growth. to study the combined effects of arbuscular mycorrhizal fungi (glomus intratadices) and jasmonic acid on growth and ecophysiologycal characteristics of pistachio seedlings cv. qazvini under drought stress, a greenhouse experiment was conducted in a completely randomized design with three replications. experimental fact...

palm date leaves were processed with lime in a processing reactor in a factorial arrangement of treatments (3 × 3) with 3 levels of temperatures (40, 80 and 100°c) and time periods (80, 160, and 240 minutes) in a completely randomized design. fermentation parameters measured using gas production technique. with increasing pretreatment time and temperature lignin content reduced from 13.0 percen...