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      • Open Access Article

        1 - Effect of Planting Patterns on Grain Yield and Morphological Characteristics of Soybean (Glycine max L.) in the Competition with Weeds
        zahra Jouzayan Alireza Yadavi Mohsen Movahedi Dehnavi Eisa Maghsoudi
        To investigate the effect of planting patterns on morphological characteristics of soybean (cv. Villiam) in the competition with weeds, an experiment was carried out in summer of 2010 at the field of Agriculture Research Station of Yasouj University. In this study a spl More
        To investigate the effect of planting patterns on morphological characteristics of soybean (cv. Villiam) in the competition with weeds, an experiment was carried out in summer of 2010 at the field of Agriculture Research Station of Yasouj University. In this study a split factorial was used based on Randomized Complete Block Design with three replications. The main factors were (weedy and weed control) and subplots were row spacing (30, 45 and 60 cm) and soybean plant density (40, 50 and 60 plants m -2). The results showed that plant density and row spacing of soybean had significant effects on plant height, leaf area index, stem diameter and grain yield of soybean. With increasing of density and reduction of row spacing, increased grain yield of soybean, so that among the density different treatments the highest grain yield (240.6 gr m-2) was obtained from density of 60 plants m-2 and among the treatments of row spacing different the most grain yield (236.8 gr m-2) was obtained from 30 cm row spacing. Weed morphological characteristics (Lambsquarters and Amaranthus) was significantly affect by the plant density and row spacing of soybean, so that increasing of plant density and reduction of row spacing led to reduction of 22.7 and 29.8 percent dry weight of Amaranthus of weeds, respectively. The results, totally showed that changes in soybean planting patterns (plant spacing and row spacing) via effects on plant competitive ability against weed can be used as an cultural and non-chemical method for weed control. Manuscript profile
      • Open Access Article

        2 - Investigation the Effect of Different Fertilizing Levels from Various Sources on Yield, and Grain Quality of Sweet Corn
        Mohammad Javad Fereidooni Eisa Maghsoudi Ali Mojabghasroldashti Yaaghoub Behzadi
        In order to investigation the effects of different fertilizing levels on qualitative and quantitative yield of sweet corn, an experiment was conducted as randomized complete block design with three replications in 2012 at Marvdasht, Fars province, Iran. Experimental tre More
        In order to investigation the effects of different fertilizing levels on qualitative and quantitative yield of sweet corn, an experiment was conducted as randomized complete block design with three replications in 2012 at Marvdasht, Fars province, Iran. Experimental treatments were including different fertilizer sources 1) 200 kg ha-1 pure nitrogen, 2) 300 kg ha-1 pure nitrogen, 3) 8 ton ha-1 poultry manure, 4) 24 ton ha-1 solid waste compost, 5) 150 kg pure nitrogen + 2 ton poultry manure per, 6) 100 kg pure nitrogen + 4 ton poultry manure, 7) 150 kg pure nitrogen + 6 ton solid waste compost, 8) 100 kg pure nitrogen + 12 ton solid waste compost and 9) control (non-fertilizer). The results indicated that the effects of different fertilizing levels were significant on grain canned yield, fresh forage, biological, plant height, length and diameter ear as well as nitrogen, phosphorus and potassium content of grain. The heights grain canned yield (931 grm-2), fresh forage (2376 grm-2) and biological (4554 grm-2) was obtained from 100 kg pure nitrogen + 4 ton poultry manure treatment. Also maximum nitrogen content (2.27 percent) and phosphorus (0.42 percent) was observed at 300 kg ha-1 pure nitrogen and 8 ton ha-1 poultry manure treatment, respectively. The use of organic fertilizer as integrated with chemical fertilizer can be suitable method for decreasing application of chemical fertilizer to increasing the quantity yield and improvement the quality of sweet corn. Manuscript profile
      • Open Access Article

        3 - The Effect of Different Levels of Nitrogen on Yield and Yield Components of two Sweet Corn Varieties in Yasouj Region
        E. Afshar M. Afshar E. Afshar M.J. Fereidooni
        In order to study the influence of different levels of nitrogen and early and medium maturity cultivars on yield and yield components of sweet corn, an experiment was conducted in Yasouj region during summer 2011. The experiment was arranged in split plots based on rand More
        In order to study the influence of different levels of nitrogen and early and medium maturity cultivars on yield and yield components of sweet corn, an experiment was conducted in Yasouj region during summer 2011. The experiment was arranged in split plots based on randomized complete block design with two factors and three replications. Main plot included four levels of nitrogen fertilizer (0, 50, 100, 150 Kg N ha-1) and sub plots included two early and medium maturity cultivars. Results showed that interaction of nitrogen and cultivar was significant on fresh ear yield. Application of 150 kg N ha-1 at medium maturity cultivar produced the highest fresh ear (1892 gr m-2) that was significant difference with other treatment. The treatment of 100 kg N ha-1 had the highest effect on grain yield (521.27 gr m-2) and medium maturity cultivar with of grain yield equals 498.57 gr m-2 was showed a higher yield than early cultivar. The highest thousand grain weight (141.99 gr) was obtained at 150 kg N ha-1 treatment. Also the highest fresh forage yield (2436.8 gr m-2) related to application of 150 kg N ha-1. Generally it seems that application of medium maturity cultivar and 150 kg N ha-1 due to maximum yield. Manuscript profile