List of Articles Minimum tillage

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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 - STUDY ON EFFECT OF HUMIDITY STRESS ON PHISIOLOGICAL INDICES OF 3 RICE VARETIES BY( DIRECT PLANTING) IN CONDITION OF MINIMUM TILLAGE IN AHVAZ AGRICULTURAL RESEARCH CENTER
  ali jafari
  In order reaching to occurate water regime in the condition of minimum tillage and its effect on the yield and yield component physiological index of rice varieties, a experiment had carried out the Agronomey year of 2006-2007 in the research field of shavour station. T More

  In order reaching to occurate water regime in the condition of minimum tillage and its effect on the yield and yield component physiological index of rice varieties, a experiment had carried out the Agronomey year of 2006-2007 in the research field of shavour station. The experiment had carried out in split-plot design some Randomized complete block with three Replication that contains three water regimes with one day or check, Two (I2) and three days (I3) Interaction for the main factor level and three rice Varieties: red Anborie (V1) and champa (V2) and LD183 (V3) or Danial as main factor level. Results of experiment show that in physiological indices humidity stress increases leaf area index (LAI), also LAI in ANBURI and CHAMPA varieties was more than LD183 variety.In interaction effects between varieties and  humidity stresses, combination of  following treatments increased LAI: anburi variety , humidity stress (,irrigating after 3 days), champa vaiety, humidity stress (irrigating afterdays), LD183 , (both kind of humidity stresses). Humidity stress by frequency of irrigating after 2 days makes highest Crop growth rate (CRG), but by increasing of time priority of humidity stress CGR decreased. Champa variety has highest CGR between all. In interaction effects between local varieties and  humidity stresses CGR decreases by increasing period of humidity stress. But in LD183 rising of humidity stress period, increased CGR.In general Humidity stress decreased relative growth rate (RGR) in all varieties. LD183 has highest RGR between all varieties. In interaction effects between varieties and  humidity stresses, local varieties  show highest RGR when they got irrigated after 3 days but in LD183 humidity stress decreased RGR because of enlarging of LAI  and increasing of CGR in period of stress condition. Net assimilation ratio (NAR) decreased at first step of humidity stress condition but in continue at last step of plant growth, NAR increased simultaneously by increasing of humidity stress. LD183 had highest NAR between all varieties. In interaction effects between varieties and  humidity stresses, local varieties show decreasing in NAR because of humidity stress.  But NAR increased in LD183 Varity in condition of irrigating after 2 days and also by enlarging of period of humidity stress NAR show falling. So the results indicate that 2 and 3 humidity stresses treatments can be used for rice irrigating.   Manuscript profile
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  3 - Study the effect of water stress on physiological indices in 3 rice cultivars by(direct Planting) under minimum tillage at Ahvaz agricultural research center
  ali jafari
  In order reaching to occurate water regime under minimum tillage system and its effect on the physiological indices of 3 rice cultivars an experiment  was conducted as a split-plot design based on  Randomized complete block with three replication in the year o More

  In order reaching to occurate water regime under minimum tillage system and its effect on the physiological indices of 3 rice cultivars an experiment  was conducted as a split-plot design based on  Randomized complete block with three replication in the year of 2006-2007 at research field of shavour station. Treatment contains three water regimes with one day or check, Two (I2) and three days (I3) Interaction for the main factor level and three rice Vareties: red Anborie (V1) and champa (V2) and LD183 (V3) or Danial as a sub factor level.. Results of experiment showed that in related to physiological indices humidity stress increases leaf area index (LAI), also LAI in ANBURI and CHAMPA varieties was more than LD183 variety.In interaction effects between varieties and humidity stresses, combination of following treatments increased LAI: anburi variety, humidity stress (, irrigating after 3 days), champa vaiety, humidity stress (irrigating afterdays), LD183, (both kind of humidity stresses). Humidity stress by frequency of irrigating after 2 days makes highest Crop growth rate (CRG), but by increasing of time priority of humidity stress CGR decreased. Champa variety has highest CGR between all. In interaction effects between local varieties and humidity stresses CGR decreases by increasing period of humidity stress. But in LD183 rising of humidity stress period, increased CGR.In general Humidity stress decreased relative growth rate (RGR) in all varieties. LD183 has highest RGR between all varieties. In interaction effects between varieties and humidity stresses, local varieties show highest RGR when they got irrigated after 3 days but in LD183 humidity stress decreased RGR because of enlarging of LAI and increasing of CGR in period of stress condition. Net assimilation ratio (NAR) decreased at first step of humidity stress condition but in continue at last step of plant growth, NAR increased simultaneously by increasing of humidity stress. LD183 had highest NAR between all varieties. In interaction effects between varieties and humidity stresses, local varieties show decreasing in NAR because of humidity stress.  But NAR increased in LD183 Varity in condition of irrigating after 2 days and also by enlarging of period of humidity stress NAR show falling. So the results indicate that 2 and 3 humidity stresses treatments can be used for rice irrigating.  Manuscript profile