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تعداد نتایج: 3097684 فیلتر نتایج به سال:
this experiment was conducted for estimating the effect of row spacing and plant density on soil moisture change, wheat yield and water use efficiency in rainfed condition, using a three replicated randomized complete block design with factorial arrangement at gorgan university of agricultural sciences and natural resources farm in anbare-ololum region in 2008-2009. the treatments that used wer...
To investigate the effect of different green manures from Gramineae and Brassicaceae families on yield, some agronomic traits forage maize, overgrowth with weeds soil organic matter, an experiment was conducted based a randomized complete block design three replications for consecutive years (2017-2020) at Agricultural Natural Resources Research Education Centre Southern Khorasan. Experimental ...
Nutrient is one of the most important factors in growth microalgae. This research was conducted to study effect nutrient mixture on biomass and lipid production Botryococcus braunii. Microalgae B. braunii cultivated commercial medium agricultural fertilizer combinations ammonium sulphate (ZA), urea, triple superphosphate (TSP). Before cultivation process, exposed UV-C rays (254 nm) for 3 minute...
Standard cultivation fails to grow most microorganisms, whereas in situ cultivation allows for the isolation of comparatively diverse and novel microorganisms. Information on similarities and differences in the physiological properties of isolates obtained from in situ cultivation and standard cultivation is limited. Therefore, we used the arctic sediment samples and compared two culture collec...
The objectives of this study were to develop Rapeseed Cultivation Simulation-Optimization-Decision Making System (Rape-CSODS), and validate it in order to design rapeseed planting, regulate and control its growth and development, and fulfill its high yield, good quality, high benefits, and standard production eventually. The models in Rape-CSODS were developed based on field experiments with 3 ...
The effects of reduced tillage and lime on crop yield and soil physical and microbial properties were studied in a weakly-structured silty clay loam soil. Two autumn primary tillage practices were compared, mouldboard ploughing to 20–25 cm and cultivation to 12 cm. Seedbed preparation was carried out by several harrowing operations in the mouldboard ploughed treatment, and with a PTO-driven har...
The frequent re-isolation of known compounds is one of the major challenges in drug discovery. Many biosynthetic genes are not expressed under standard culture conditions, thus limiting the chemical diversity of microbial compounds that can be obtained through fermentation. On the other hand, the competition during co-cultivation of two or more different microorganisms in most cases leads to an...
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