to study the effect of harvesting time on soybean seed germination and vigor a factorial experiment with three replications, including of five harvesting time and three soybean cultivars was carried out in the field and glasshouse. the effect of harvesting time on seed germination percentage (in the field, cold test and paper test), seed germination rate, shoot and root weights, 1000-seed weigh...

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...

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...

companies are always looking to use all possible means to achieve success and effectiveness. today, is notable the use of people with more subjective and skills specific characteristics. the importance of the issue of spirituality and religion, especially spiritual intelligence, felt the various aspects of new era. one of the necessities in the field of anthropology, is according to scientists ...

treatment of bone metastases comprises over 10% of the workload of a radiation-oncology center. bone metastases produce severe pain and immobility, necessitate narcotic use, and reduce the quality of life. a good palliative treatment must be complete, free from side effects and fast; thus we decided to evaluate strontium-89 (89sr) effectivity for palliation of breast and prostate cancer bone me...

knowledge of environmental and ecological factors as well as growth and development pattern of fruit trees is an important task in orchard management and fruit industry. in addition, determination of growth pattern is an important aspect in the orchard management system. in this research, the total photosynthesis rate and growth pattern was measured in nine asian pear cultivars. experiment was ...

background and objectives: over the last decade, climate change has been one of the most challenging issues in the scientific papers. studying the impacts of climate change on crop productivity at regional scale will depend on the right estimate of future climate. this estimation is being implemented by climate models and most of them by general circulation models (gcms). this study aims at pre...

for designing tillage implements it would be better to estimate soil forces exerted to the implements. many researches showed that numerical method of discrete element method (dem) is the cheapest and fastest technique for modeling granular material such as soil and especially sandy soil. in this study, paraplow and bentleg tines performance was compared with conventional tine using experimenta...

thermoluminescence (tl) dating was established in oxford to fulfil the demand for dating ceramics and other heated man made products (aitken, 1985).  it determines the time elapsed since the mineral grains have been heated. following the establishment of tl dating method, it was used to date fired materials such as pottery, flint and etc. optically stimulated luminescence (osl) determines the t...

rainfall and flow rate are of the most important climatic and hydrologic parameters whose investigation and determination of their behavior are of great importance in water resources management. one of the most suitable methods available for assessment of hydro-climatological conditions in the watershed is trend analysis which is used to examine the changes of a variable during time. current st...