List of Articles crop rotation

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  1 - Using desalinization models for scheduling crop rotation of saline-sodic soils: a case study in Ramhormoz region, Iran
  safoora Asadi Kapourchal Mehdi Homaee
   Soil salinity is one of the important challenges for sustainable agriculture in arid and semi-arid regions. Accumulation of soluble salts within the soil profile adversely affects some physical and chemical properties of soils including osmotic pressure, permeabil More

   Soil salinity is one of the important challenges for sustainable agriculture in arid and semi-arid regions. Accumulation of soluble salts within the soil profile adversely affects some physical and chemical properties of soils including osmotic pressure, permeability and hydraulic conductivity. As a consequence, growth and development of plant is seriously reduced or fully ceased. The objective of this study was to assess using desalinization models for scheduling crop rotation of reclamation saline-sodic soils. Consequently, a large area of 45,000 ha with S4A3 (extreme salinity and sodicity) salinity/sodicity class was selected to obtain the required data ,in Khuzestan, Iran. This experiment was conducted with two treatments each with three replicates. In the first treatment, the experiment was conducted by applying just 100 cm water depth in four-25 cm intervals. In the second treatment, 10 Ton gypsum (78% purity rate) was applied prior to salt leaching together with leaching water. Soil samples were taken from 0-25, 25-50, 50-75, 75-100, 100-125 and 125-150 cm soil depths before, during and after each leaching water application interval. The required physical and chemical soil analyses were performed for the collected data. The results indicated that the logarithmic model can estimate the capital leaching requirement much better than other models. Based on the obtained model, the amount of net water needed to reduce initial soil salinity was calculated and finally crop rotation in two options was presented for reclamation of saline-sodic soils. The first option with preliminary leaching and cultivation of barley in continues leaching was assigned as the first priority. The second option with preliminary leaching and alfalfa cultivation and continues leaching was assigned as the next priority. The obtained results further indicated that the inclusion of scheduling crop rotation to the leaching practice, in addition to enhance effective leaching of soluble salts from the soil profile, causes considerable water saving. Manuscript profile
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  2 - Effect of different crops rotation with rice, N rate and N split application on crop grain yield
  Sajjad Rezaei Noupashani Hashem Aminpanah
  To evaluate the effect of previous crop, N rate and N split application on rice (Oryza sativa L. cv. Hashemi) growth and paddy yield, a field experiment was conducted at Sowma'ehSara, Guilan province, in 2014 as a split-factorial arrangement based on Randomized Complete More

  To evaluate the effect of previous crop, N rate and N split application on rice (Oryza sativa L. cv. Hashemi) growth and paddy yield, a field experiment was conducted at Sowma'ehSara, Guilan province, in 2014 as a split-factorial arrangement based on Randomized Complete Block Design with three replicates. Main plots were previous crop [Berseem clover, faba bean, and control (fallow)] and subplots were the factorial arrangement of N rate (50, 75, and 100 percent of N recommended rate which was 50, 75 and 100 kg Urea ha-1, respectively) and N split application (100 percent at transplanting stage, 100 percent at tillering stage, and 50 percent at transplanting stage and 50 percent at panicle initiation). Results showed that rice paddy yield was significantly affected by previous crop and N rate, but N split application had no significant effect on paddy yield. The highest paddy yield (4142.8 kg ha-1) was obtained when rice was cultivated after berseem clover and the lowest paddy yield (3494.0 kg ha-1) was obtained when rice was cultivated after faba bean. Rice paddy yield was increased significantly by 8% as N application rate increased from 50 to 78 kg urea ha-1, but further increase in N rate (100 kg urea ha-1) had no significant effect on paddy yield. Based on the result of this experiment, the highest rice paddy (4142.8 kg ha-1) was obtained when rice was cultivated after berseem clover and N was applied at the rate of 75 kg urea ha-1. Manuscript profile
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  3 - Factors affecting sustainability of wheat cultivation system in Gorgan county
  mohammad mehdi mirzaei Zahra Ardakani
  10.22034/aej.2019.664677
  Sustainability in wheat cultivation systems depends on several components. The current study was conducted to identify and analyze the sustainability components of wheat cultivation system in Gorgan county. The statistical population was all farmers and wheat growers of More

  Sustainability in wheat cultivation systems depends on several components. The current study was conducted to identify and analyze the sustainability components of wheat cultivation system in Gorgan county. The statistical population was all farmers and wheat growers of Gorgan county. Samples volume was estimated through Cochran formula and samples were chosen randomly. Finally, 190 questionnaires were used. The validity of questionnaire was confirmed by the agricultural development experts and the reliability of the questionnaire items was calculated by Cronbach’s alpha coefficient as 0.806. Data analyzed by factor analysis method and in descriptive and analytical parts. There was a significant positive correlation between the main variables such as cultivated area of wheat, integrated pest management and land reform, using modified seeds, number of visits to extension centers, sustainable agricultural knowledge level, job satisfaction from agriculture, profit from wheat cultivation, wheat yield and sustainability factors of wheat cultivation system. In total, five factors of ecological-crop factors, sustainable-oriented crop operation, support-extension services factor, social-collaborative status factors, and economical factor consisting total of 21 variables accounted for about 74% of variance in sustainability of wheat cultivation system in Gorgan county. Improving rural resource management, expanding cooperative and participatory agricultural activities, native knowledge of farmers, policy-makings by extension planners and reducing production. Costs in the exploitation process can play an effective role in improving the process of agricultural stabilization.                                                                                                                                                                                                                                                                              Manuscript profile
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  4 - Effect of Hungarian vetch residues on initial establishment and ‎‎yield of wheat cultivars in field condition
  Bahman Abdolrahmani Gholamreza Valizadeh
  10.22034/aej.2018.544492
  To investigate the effect of different amounts of Hungarian vetch residues on growth and yield of wheat cultivars in cold regions, an experiment was conducted in a strip plot design based on randomized complete block design with three replications during the growing yea More

  To investigate the effect of different amounts of Hungarian vetch residues on growth and yield of wheat cultivars in cold regions, an experiment was conducted in a strip plot design based on randomized complete block design with three replications during the growing years of 2014-2017 at Dryland Research Institute of Iran, Maragheh Station. The amounts of vetch residues in three levels of 0, 1.5 and 3 ton/ha as horizontal factor and wheat cultivars including Homa, Azar2 and Baran as vertical factor were evaluated. The experiment was carried out on forage – wheat rotation farm, and the plant residues of the vetch were added to the experimental plots spread uniformly on the surface of the soil. Plant residues of 1.5 tons per hectare had a positive effect on early establishment of seedlings in the field, yield and yield components of wheat. Homa cultivar had the highest positive reaction to the addition of green vetch residues in the amount of 1.5 tons per hectare in terms of thousand kernel weight, grain yield, biomass yield, harvest index, productivity rate and recipitation efficiency index. Therefore, the maintenance of vetch residues of 1.5 tons per hectare can improve the yield of wheat. Manuscript profile
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  5 - Effect of wheat residues on initial establishment, cold tolerance and ‎‎yield of rainfed barley cultivars in field condition
  Bahman Abdolrahmani
  10.22034/aej.2021.682638
  To investigate the effect of different amounts of wheat residues on growth and yield of barley cultivars in cold regions, a strip plot design based on a randomized complete block design with three replications was done in two years at Dry land Research Institute of Iran More

  To investigate the effect of different amounts of wheat residues on growth and yield of barley cultivars in cold regions, a strip plot design based on a randomized complete block design with three replications was done in two years at Dry land Research Institute of Iran, Maragheh Station. In this study, the amount of wheat residues at three levels of 0.0, 1.5 and 3 ton/ha as horizontal factors and barley cultivars including Sahand, Abidar, Reyhan03 and Usef as vertical factors were evaluated. The experiment was carried out on a wheat- barley rotation farm. Residues of the wheat were added to the experimental plots and distributed uniformly on the surface of the soil. Plant residues of 3 tons per hectare had positive effects on early establishment of seedlings in the field, cold tolerance, yield and yield components of barley. The results also showed that Abidar cultivar had the highest positive reaction to the addition of wheat residues in the amount of 3 tons per hectare in terms of seedling emergence rate and percentage, thousand kernel weight, grain yield, biomass yield, productivity rate and precipitation efficiency index. Therefore, the maintenance of wheat residues of 3 tons per hectare can improve the yield of barley in cold regions Manuscript profile
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  6 - Broomcorn allelopathic effect on germination and early growth stages of barley
  Somayeh Hashemizadeh Soleiman Jamshidi shahram shahrokhi
  Broomcorn is extensively cropped in Miyaneh region for traditional broom production and occasionally included in rotation with barley by local farmers. The research objective was clarifying of broomcorn allelopathic potential on barley germination and initial growth. Al More

  Broomcorn is extensively cropped in Miyaneh region for traditional broom production and occasionally included in rotation with barley by local farmers. The research objective was clarifying of broomcorn allelopathic potential on barley germination and initial growth. Allelopathic properties of 2.5, 5, 7.5, and 10% of broomcorn roots and shoots aqueous extracts sampled 1, 2, 3, and 4 months after planting, also root exudates using equal compartment agar method and 5 and 10% of intact and burnt crop residues aqueous extract on barley germination and initial growth were evaluated. Also, 2.5, 5, 7.5, and 10% of 3-month broomcorn foliar extracts on barley seedlings growth was evaluated in greenhouse condition. Broomcorn root extracts was less allelopathic on barley seed germination, also 3-month foliar was the most allelopathic studied plant organs on seed germination and growth of barley. Also, broomcorn root exudates were more toxic on barley plumule than radicle. Residue burning decreased allelopathic effect of broomcorn residue up to 77%. Irrigating with broomcorn extracts had less allelopathic effects than direct bioassay on barley seedlings in laboratory. Considering remarkable allelopathic potential of broomcorn on barley, its residue management should be concerned in broomcorn-barley rotations. Manuscript profile