List of Articles محمد آرمین

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  1 - The Response of Corn (Zea mays L.) Hybrids with Different Maturity Groups to Low Dose Application of Nicosulfuron Herbicide
  Iraj Rooki M. Armin Matin Jamimoeini
  10.30495/jcep.2019.666257
  To investigate the response of corn varieties with different maturity groups to low dose applications of nicosulfuron herbicide, a split plot experiment with a randomized complete block design with three replications was carried out in Barekat Jovain Agricultural Compan More

  To investigate the response of corn varieties with different maturity groups to low dose applications of nicosulfuron herbicide, a split plot experiment with a randomized complete block design with three replications was carried out in Barekat Jovain Agricultural Company (Sabzevar, Razavikhorasan province) in 2017. Factors were: corn hybrids (early maturing (single cross hybrid 260, medium maturing (single cross hybrid 400) and late maturing (single cross hybrid 704) varieties as main plot and subplots five herbicide low dose applications (0, 25, 50, 75 and 100% recommended dose (50 g.ha-1 a.i. nicosulfuron) and with one weed free treatment. The results showed that, the late maturity hybrid had higher plant height, ear weight, number of rows per cob, number of seeds per row, cob weight, and seed number in cob, economic yield, biological yield, weed density and weed dry weight than other hybrids. Increasing doses of herbicide increased plant height (0.64%), ear weight (39.45%), number of rows per cob (8.93%), number of seeds per row (30.15%), seed weight (10.68%), number of seed per cob (40.63%), economic yield (41.82%), biological yield (14.95%)and decreased weed density (70.88%)and weed dry weight (82.17%) as compared to that of weedy condition. Although use of herbicide to reduce weed dry weight in late maturing hybrids was more than early and medium maturing hybrids but the use of the recommended herbicide dose had the same effects on weed control. 75% of the recommended dose in all three varieties produced the same yield as compared to the recommended dose. But in the late maturity hybrid, 50% reduction in recommended doses could be similar to the recommended dosage. In general, it can be said that increasing the length of the plant growth period allows the use of lower doses of herbicide than the recommended dose. Manuscript profile
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  2 - Effect of Weed Interference in Different Agronomic Managements on Grain Yield and Yield Components of Chickpea (Cicer arietinum L.)
  محمد Asghari M. Armin
  A field experiment was conducted in 2012 at the Agricultural Research Station of Motahari of Sabzevar, to determine the influence of different crop management practices and weed interference duration on grain yield and yield components of chickpea (Cicer arietinum L.). More

  A field experiment was conducted in 2012 at the Agricultural Research Station of Motahari of Sabzevar, to determine the influence of different crop management practices and weed interference duration on grain yield and yield components of chickpea (Cicer arietinum L.). A split plot experiment was employed in randomized complete block design with three replications. The main plots consisted of three crop management practices (Low, Medium and High input levels) and sub plot of five weed interference duration (0 as control, 15, 30, 45 and 60 weedy days after chickpea emergence). The results showed weed density, weed dry weight and number of plants per pod were not affected by crop management practices, however, plant height, biological and economic yield were inflenced by crop management practices. High input level had the highest plant height, biological and economic yield. Increased interference reduced yield, number of plants per pod and number of branches per plant of chickpea. Yield loss after full-season weed competition (60 days interference) was 80.60% as compared to control. Although increasing of weed interference reduced weed density but weed dry weight was increased. Fitted logistic regression function coefficients showed that the onset of yield loss was earlier (24.5 days after emergence) at low input levels while at high input levels it was postponed to 26 days after emergence. It can be conducted that increasing interference duration would reduce yield and yield components of chickpea, but under high input conditions competitiveness of chickpea will be increased. Manuscript profile
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  3 - Integrated Weed Management of Cotton Planting in Conventional and Ultra-Narrow Row Space
  Ali Reza Ghavi Mohammad Armin
  10.30495/jcep.2021.679981
  To determine the most appropriate method of weed management in conventional row and ultra narrow row spacings of cotton, a factorial experiment was based on a randomized complete block design with three replications was conducted in Sabzevar in 2015-2016. Factors under More

  To determine the most appropriate method of weed management in conventional row and ultra narrow row spacings of cotton, a factorial experiment was based on a randomized complete block design with three replications was conducted in Sabzevar in 2015-2016. Factors under study were plant spacings in two levels, conventional (70 cm row spacing) and ultra-narrow row (20 cm row spacing) and weed management in six levels: without controlling of weeds (control), application of herbicide at recommended dose of Ethalfluralin (Treflan 48% EC) at 1160 g/ai ha), application of herbicide at 50% recommended dose + hand weeding at 45 days after emergence (DAE), application of herbicide at 50% recommended dose + two times hand weeding at 30 and 60 DAE, three times hand weeding at 30, 45 and 60 DAE, and full weed free condition. The results showed that traits like weed density, by 33.71 percent, lateral branches by 14.77 percent, number of bolls per plant by 16.88 percent, and boll weight by 12.30 percent were lower in narrow row spacing, while seed cotton yield by 39.85 percent and fiber yield by 23.71 percent higher, as compared to, conventional row spacing. In the conventional cultivation system, if 50% of the herbicide dose is reduced, it needs two hands weeding at 30 and 60 DAE; while in ultra-narrow row spacing condition, with a 50% reduction in the recommended herbicide dose, one hand weeding at 45 DAE is needed to achieve suitable seed cotton yield. As a whole, the results showed that, under ultra-narrow row spacing, with a 50% reduction in herbicide dose and reduced weed control times (only one hand weeding at 45 DAE) it can be obtained seed cotton yield similar to other control treatments. Manuscript profile
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  4 - Weed Interference Duration Effect on Yield and Yield Components of Cumin (Cuminum cyminum L.) in Conventional and Organic Conditions
  Masoud Zarei Mohammad Armin Mosarreza Hokmabadi
  10.30495/jcep.2020.671177
  To investigate the effect of duration of weed interference on yield and yield components of cumin grown under conventional and organic condition, a field experiment was conducted in a private farm in Sabzevar in 2017-2018. A split plot experiment based on a randomized c More

  To investigate the effect of duration of weed interference on yield and yield components of cumin grown under conventional and organic condition, a field experiment was conducted in a private farm in Sabzevar in 2017-2018. A split plot experiment based on a randomized complete block design with three replications was conducted. Factors were conventional and organic growing was considered as the main factor and duration of weed interference (0, 2, 4, 6 weeks after emergence and weedy) as subplots. The results showed that conventional farming in terms of weed density, weed dry matter, plant height, lateral branch number, number of seed per umbrella, biologic and seed yield were better than organic farming, while, number of umbrella per plant under organic farming was higher than that of conventional farming. Increasing duration of interference decreased plant height (20.21%), lateral branches (42.85%), the number of umbrella per plant (47.91%), the number of seeds per umbrella (37.5%), biological yield (33.96%) and seed yield (43.90%). Fitted logistic regression function coefficients showed that the onset of yield loss was earlier (11 days after emergence) in conventional condition while in organic condition it was postponed to 17.5 days after emergence. Overall, the results showed that weed interference, under both conventional and organic conditions, reduced seed yield. Weed interference under organic farming delayed 4 weeks and under conventional condition to 2 weeks after cumin emergence and yield reduction was not significant. Thus, control of weeds in conventional conditions should commence from 12 days after emergence and under organic conditions from 18 days after emergence. Manuscript profile
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  5 - The Effect of Hand Weeding Times on the Reduce of Herbicide Application in Sugar beet
  Mohammad Nowbakht Alizadeh Sabzevari Mohammad Armin Matin Jami moeini
  The effect of times of weeding on reducing herbicide dose in sugar beet was studied in 2011-2012 in Jovein. The experiment was conducted in split plot based on a randomized complete block design with three replications. The main factor was herbicide doses (0, 25, 50, 75 More

  The effect of times of weeding on reducing herbicide dose in sugar beet was studied in 2011-2012 in Jovein. The experiment was conducted in split plot based on a randomized complete block design with three replications. The main factor was herbicide doses (0, 25, 50, 75 and 100% of recommended dose (Chloridazon 3.25 kg. a.i. ha-1 soil applied) and sub plot was times of hand weeding (0, one time hand hoeing, tow times hand hoeing, at 30 and 60 days after plant emergence). Traits like root yield and white sugar yields, impure sugar content, alkalinity coefficient, sodium, potassium, α-amino nitrogen and sugar content in molasses were evaluated. The result showed that the increased frequency of weeding reduced weed density, weed dry weight, α-amino nitrogen and percentage of impure and pure sugar contents, root yield and sugar yield. The least weed density and biomass of weeds were observed in recommended dose. Increasing the doses of herbicide increased impure sugar content (14.48%), α-amino nitrogen (57.86%), pure sugar (19.30%), root yield (77.67%) and sugar yield (111.17%) while it decreased potassium (18.77%), sodium (28.84%) contents and alkalinity coefficient (52.76%) as compared with that of control. For most of the traits, there were not statistically significant difference between the recommended dose and 75% of the recommended dose. Increasing the number of hand weedings reduced herbicide dosages. The, results finally showed that 25% dose reduction of herbicide in one time weeding and 50% dose reduction of it in twice weedings might produce desirable economic yield (root yield). Manuscript profile
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  6 - Reduction of Phenmedipham + Desmedipham + Ethofumesate Herbicides Dosage Based on Application Timing in Sugar Beet
  Valiyolah Anabestani Mohammad Armin
  An experiment was conducted to study possible reduction of concentration (dose) of phenmedipham + desmedipham + ethofumesate herbicides at different application times to control weeds in sugar beet field. Thus, a factorial experiment based on complete randomized block d More

  An experiment was conducted to study possible reduction of concentration (dose) of phenmedipham + desmedipham + ethofumesate herbicides at different application times to control weeds in sugar beet field. Thus, a factorial experiment based on complete randomized block design with three replications was performed at Sabzevar, Khorasan-e-Razavi in 2013. Factors consisted of herbicide dosages (control, 75% of the recommended dosage, and 125% of recommended dosage and application times at 2-4, 4-8 and 8-12 leaf stages of sugar beet. Herbicide used in the experiment was phenmedipham (9.2%) + desmedipham (7.2%) + ethofumesate (11.3%) (PROGRESS OF BETAMIX) as 877 ga.i ha-1 27.4 EC. The results indicated that the delayed application of herbicide increased weed density by 55.92% and weed dry matter by 33%. Application of herbicide at 4-8 leaf stage produced highest root and sugar yields. Root impurities were not affected by the time of herbicide application. Used of 125% of recommended dosage resulted in lowest weed density and weed dry matter and highest root and sugar yields. Impure sugar percentage and K content was not affected by herbicide dosage. Other root quality characteristics were not statistically significant different between the recommended dose 125% of recommended dosages. Results as a wholes suggested that at early growth stage of sugar beet (2-4 leaf stage) lower herbicide dosage and at later growth stage of sugar beet (8-12 leaf stage) higher herbicide dosage may produce highest root yield of sugar beet. Manuscript profile