List of Articles Cover crops

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  1 - Effect of cover crops and metribuzin herbicide on weed seed bank of potato (Solanum tuberosum L.) in conservation and convention tillage systems
  Goudarz Ahmadvand Somayeh Hajinia
  To investigate the effects of cover crop and metribuzin herbicide on weed seed bank of potato in different tillage systems, the experiment was carried out as a split- split plot based on a randomized complete block design with three replications at the Research Station More

  To investigate the effects of cover crop and metribuzin herbicide on weed seed bank of potato in different tillage systems, the experiment was carried out as a split- split plot based on a randomized complete block design with three replications at the Research Station of Agricultural Faculty of Bu-Ali Sina University, 2013. The treatments included tillage systems at two levels (conventional tillage and minimum tillage) as main plots, three levels of cover crop (Vetch (vica villosa roth), barley (Hordeum vulgare L.) and without cover crops) as subplot, and two levels of metribuzin herbicide (with herbicide and no herbicide) as sub-sub plots. The results showed that the application of metribuzin herbicide reduced seed bank density of weeds. Seed bank density of weeds reduced with application of metribuzin herbicide was about 33.62 percent, compared to no herbicide. Application of cover crops in the minimum and conventional tillage reduced seed bank density of weeds 44.43 and 54.88 percent, respectively, compared to no cover crops. The use of barley and vetch cover cover decreased the richness index of seed bank of weeds. Metribuzin herbicide in the minimum and conventional tillage in comparison to control treatment decreased 23.22 and 71.51 percent the richness index of the weed species. Cover crops decreased by 24.60 and 23.13 percent in conventional tillage and minimum indices of Shannon-Weiner weeds. The decrease in the Shannon-Weiner index with application of herbicides and cover crop in the conventional and minimum tillage was 85.17 and 32.66 percent, respectively, compared to no cover crops. Manuscript profile
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  2 - Effect of Cover Crops and Nitrogen Fertilizer on Total Production of Forage Corn and Dry Weight of Weeds
  رسول Fakhari A. Tobeh H. Khanzadeh A. Gholipouri M.T. Alebrahimi
  To evaluate the effect of cover crops, split application of nitrogen and control weeds on forage corn and weed biomass a factorial experiment based on randomized complete block design with three replications and three factors was conducted at the Agricultural Research S More

  To evaluate the effect of cover crops, split application of nitrogen and control weeds on forage corn and weed biomass a factorial experiment based on randomized complete block design with three replications and three factors was conducted at the Agricultural Research Station of Ardabil (Iran) during 2012 crop year. The first factor was cover crops (consisting of winter rye, hairy vetch, berseem clover, with and without weeding) as controls. The second factor was two levels of split application of 225 kg.ha-1 urea at two growth stages forage corn: the first level (N1= 1/2 at planting and 1/2 at 8-10 leaf stage), second level (N2= 1/3 at planting, 1/3 at 8-10 leaf and 1/3 one week before tasselling stage). The third factor consisted of two levels of weed control: weeding at 8 leaves and weeding one week before tasselling. Results showed that winter rye, hairy vetch and berseem clover cover crops decreased total weed dry weights up to 87, 82 and 65 % respectively as compared to control (without weeding). Cover crops and nitrogen application time had a significant effect on yield of fresh forage corn and cover crops. Based on the advantages of effective weed control and higher forage production of hairy vetch it can be recommended as proper cover crop. Manuscript profile
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  3 - Assessment of Changes in Weed Dry Weight and some Characteristics of Safflower (Carthamus tinctorius) under Different Sources of Fertilizer and Intercropping
  Saeid Heydarzadeh Jalal Jalilian
  To study the effect of different organic and chemical fertilizers on weed biomass and some characteristics of safflower, a factorial experiment based on randomized complete block design with three replications was done at the Urmia University Reaearch Farm in 2013. Trea More

  To study the effect of different organic and chemical fertilizers on weed biomass and some characteristics of safflower, a factorial experiment based on randomized complete block design with three replications was done at the Urmia University Reaearch Farm in 2013. Treatments consisted of growing of cover crops (red clover, grass pea, hairy, bitter vetch) along with the safflower rows and two weed control treatments (with and without weed) as a first factor and application of organic manure (cattle manure+biofertilizer) and the different nitrogen and phosphuros fertilizer levels (100 % of recommended chemical fertilizer, 67 and 63 % of recommended N and P, 50 and 40 % of recommended N and P) as second factor. Results showed that the biomass yield of broad and narrow leaf weeds affected by the combined treatments of cover crops and use of fertilizers. The biomass yield of broad and narrow leaf weeds were redused by 74.78, 82.22% under vetch cover crop when 50 and 40% of recommended N and P fertilizers were used, in comparison with sole culture of safflower and use of 100% of recommended chemical fertilizers. The maximum of seed yield (3431 kg.ha-1) and biological yield (8239 kg.ha-1) of safflower obtained from using 100% of recommended chemical fertilizers and without growing cover crops. Results, as a whole, showed that at higher levels of chemical fertilizers the competitive effects of weeds on safflower were higher than lower levels of fertilizers. Manuscript profile
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  4 - Influence of Green Manuring From Different Cover Crops and Farm Yard Manures on Quantitative and Qualitative Characteristics of Forage Corn in Low Input Farming
  MOHAMAD HESAM SHAHRAJABIAN ALI SOLEYMANI MEHDI KHOSHKHARAM
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  5 - The Effect of Green Synthesis of Chitosan with Oat Extract on the Germination of Pigweed (Amaranthus retroflexus)
  Ali ebadi فاطمه احدنیا
  Oats (Avena sativa L.) possess allelopathic properties and can serve as effective cover crops to inhibit weed growth. This study aimed to investigate the effect of the aqueous extract and formulated extract of oats with chitosan nanoparticles on the germination of red r More

  Oats (Avena sativa L.) possess allelopathic properties and can serve as effective cover crops to inhibit weed growth. This study aimed to investigate the effect of the aqueous extract and formulated extract of oats with chitosan nanoparticles on the germination of red root pigweed (Amaranthus retroflexus) in the year 2021. The experiment was designed using a factorial based on a completely randomized design, with three repetitions. The experimental treatments included the type of extract (aqueous extract of oats and formulated extract of oats with chitosan nanoparticles) and six control concentrations (distilled water and chitosan without plant extract), 10, 50, 100, 150, and 200 g/L. The results of the study demonstrated that the interaction between the type of extract and different concentrations significantly affected the evaluated traits at the probability level of 1%. The percentage of germination in the aqueous extract of oats and its formulated extract with chitosan nanoparticles in concentrations of 100, 150, and 200 were zero, 16.66, 15.33, and 5.33%, respectively. Also, increasing the concentration of the extract formulated with chitosan caused a decrease in germination rate (85.46, 87.95, and 96.10%), mean daily germination percentage (82.75, 84.20, and 94.49%), seedling vigor index (85.53, 87.60 and 97.71%) and synchronization index (45.76, 47.90 and 14.75%) of the red root pigweed compared to chitosan without plant extract. These findings suggest that of the aqueous extract of oats had a greater inhibition on the germination the red root pigweed weed. Manuscript profile