scholarly journals Efficacy of Different Formulation of Glyphosate Herbicide on Sorghum Weeds

2021 ◽  
Author(s):  
Dawit Fisseha ◽  
Mizan Amare ◽  
Letemariam Desta ◽  
Zerabruk G/medhin
Keyword(s):  
Growth Stage ◽  
Agricultural Research ◽  
Growing Season ◽  
New Product ◽  
Early Growth ◽  
Efficacy Trial ◽  
Sorghum Variety ◽  
Glyphosate Herbicide ◽  
Weeds Control ◽  
Herbicide Glyphosate

Background: Sorghum is susceptible to weed at its early growth stage. The aim of this efficacy trial was to ensurethat efficacy of chemical Glyphosate-isopropylammonium 41% SL on sorghum weeds control non- selectively before sorghum sowing.Methods: Thrice experiment was carried out in Humera area in Humera Agricultural Research Center, Semur farm and Desta Berhe farm during rainy growing season of 2019 using sorghum variety i.e. Brhan. Pre and post spray weed count were subjected to efficacy calculation.Result: New product of herbicide, Glyphosate-isopropylammonium 41% SL (Glpho) at 3.00 lt a.i./ha was shown better performance than the standard check Glymax 48% SL (W/V). Therefore, the new Glpho product could be suggested as an alternative non-selective herbicide before sorghum sowing.

scholarly journals Efficacy Trial of AgroSuper (2, 4-D Dimethyl Amine Salt 720G/L SL) on Sorghum Broad Leaf Weed

2020 ◽  
pp. 29-33
Author(s):  
Dawit Fisseha
Keyword(s):  
Agricultural Research ◽  
Early Stage ◽  
Water Solution ◽  
Amine Salt ◽  
Effective Control ◽  
Efficacy Trial ◽  
Sorghum Variety ◽  
Broad Leaf ◽  
Dimethyl Amine ◽  
Replication Experiment

Sorghum is susceptible to weed competition at its early stage of growth. The aim of this efficacy trial was to ensure that candidate chemical AgroSuper verification on a selective and effective control of broad leaf weed on Sorghum, after sorghum germination. RCBD with three replication experiment was carried out in Humera area in Humera Agricultural Research Center and Desta Berhe farm during 2019 rainy growing season using sorghum variety called Brhan. Pre and post spray weed count were subjected to efficacy calculation. Finally, new product of herbicide, AgroSuper (2, 4-D dimethyl amine salt 720G/L SL) 1.5 liter using 200-liter water solution per hectare was shown better performance than the standard check Aura 72SL. Therefore, the new AgroSuper could be suggested as an alternative selective herbicide during post-emergency to kill broad leaf weeds of sorghum.

Observations oh Nucleation and Growth of Voids in Nickel

1970 ◽  
Vol 28 ◽  
pp. 414-415
Author(s):  
J. L. Brimhall ◽  
H. E. Kissinger ◽  
B. Mastel
Keyword(s):  
High Purity ◽  
Growth Stage ◽  
Elevated Temperatures ◽  
Early Growth ◽  
Nucleation And Growth ◽  
Pure Nickel ◽  
Different Temperatures ◽  
Total Fluence ◽  
Neutron Exposure ◽  
Growth Of Voids

Some information on the size and density of voids that develop in several high purity metals and alloys during irradiation with neutrons at elevated temperatures has been reported as a function of irradiation parameters. An area of particular interest is the nucleation and early growth stage of voids. It is the purpose of this paper to describe the microstructure in high purity nickel after irradiation to a very low but constant neutron exposure at three different temperatures.Annealed specimens of 99-997% pure nickel in the form of foils 75μ thick were irradiated in a capsule to a total fluence of 2.2 × 1019 n/cm2 (E > 1.0 MeV). The capsule consisted of three temperature zones maintained by heaters and monitored by thermocouples at 350, 400, and 450°C, respectively. The temperature was automatically dropped to 60°C while the reactor was down.

Early growth of lodgepole pine after establishment of alsike clover–Rhizobium nitrogen-fixing symbiosis

1992 ◽  
Vol 22 (8) ◽  
pp. 1089-1093 ◽  
Author(s):  
R. Trowbridge ◽  
F.B. Holl
Keyword(s):  
Forest Floor ◽  
Lodgepole Pine ◽  
Nitrogen Concentration ◽  
Growing Season ◽  
Early Growth ◽  
Percent Cover ◽  
Foliar Nitrogen ◽  
Growing Seasons ◽  
Pine Seedlings ◽  
Needle Mass

An overdense lodgepole pine (Pinuscontorta Dougl. ex Loud.) stand was knocked down and the site was prepared by broadcast burn, windrow burn, or mechanical forest floor removal. Inoculated alsike clover (Trifoliumhybridum L.) was seeded at 0, 10, 20, and 30 kg/ha for the three different site preparation treatments to determine the effects of (i) site preparation on infection and effectiveness of the clover–Rhizobium symbiosis and clover percent cover and (ii) the clover–Rhizobium N2-fixing symbiosis on survival, early growth, and foliar nitrogen concentration of lodgepole pine seedlings. The N2-fixing symbiosis established well in all treatments. Clover percent cover increased with increasing rate of seeding, although by relatively few percent in the clover seeded plots. Broadcast burning, windrow burning, and mechanical forest floor removal did not affect the establishment of the N2-fixing symbiosis or clover percent cover. Lodgepole pine survival was not affected by the seeding treatments in any year, nor were height measurements during the first three growing seasons. Seedling height was slightly less in clover-seeded plots compared with controls in the fourth growing season. Lodgepole pine seedlings on clover-seeded plots had decreased diameter growth compared with controls during the first three growing seasons, but incremental diameter growth no longer showed this effect by the fourth growing season. Needle mass (g/100 needles) was less in clover-seeded plots at the end of the second growing season, but this effect was reversed by the fourth growing season, when both needle mass and foliar nitrogen concentration in lodgepole pine foliage were greater in clover-seeded plots.

scholarly journals Yield of winter rapes seeds on optimization of individual elements of growing technology

2020 ◽  
Author(s):  
M. Bakhmat ◽  
◽  
I. Sendetskyi ◽  
Keyword(s):  
Oilseed Rape ◽  
Growth Regulator ◽  
Agricultural Research ◽  
Growing Season ◽  
Research Station ◽  
Winter Oilseed Rape ◽  
Winter Rape ◽  
Podzolic Soils ◽  
Carpathian Region ◽  
Winter Rapeseed

The results of researches of influence of ways of application of growth regulator "Vermiyodis" and sowing norms on productivity of winter rape of Cheremosh and hybrid Mercedes are covered. The study was performed during 2017-2020 on sod-podzolic soils of the experimental field of the Carpathian State Agricultural Research Station of the Institute of Agriculture of the Carpathian region of NAAS Taking into account the yield, it was found that the pre-sowing treatment of winter rapeseed Cheremosh with growth regulator "Vermiyodis" at a dose of 5 l / ha on average for 2017-2020 at sowing rates of 0.6 million / ha of similar seeds, the yield was 3.60 t / ha or 0.26 t / ha more than control, for sowing rates 0.8 million / ha of similar seeds - 3.92 t / ha or 0.21 t / ha more than control, for sowing rates 1.0 million / ha of similar seeds - 3.46 t / ha or 0.23 t / ha more than control. With a single spraying of winter oilseed rape plants during the growing season with the growth regulator "Vermiyodis" at a dose of 4 l / ha at sowing rates of 0.6 million / ha of similar seeds, the yield was 3.62 t / ha or 0.28 t / ha more control, with at the sowing rate of 0.8 million / ha of similar seeds, the yield was 3.94 t / ha or 0.33 t / ha more than the control, at the sowing rate of 1.0 million / ha of similar seeds, the yield was 3.48 t / ha or 0.25 t / ha more than control. In the variants where pre-sowing treatment of rapeseed seeds of winter hybrid Mercedes with growth regulator "Vermiyodis" at a dose of 5 l / t and during the growing season was carried out a single spraying of plants with growth regulator "Vermiyodis" at a dose of 4 l / ha at seeding rates of 0.6 million / ha similar seeds yield was 3.73 t / ha or 0.39 t / ha more than control, at sowing rates of 0.8 million / ha of similar seeds - 4.07 t / ha or 0.46 t / ha more than control, at sowing rates of 1.0 million / ha of similar seeds - 3.62 t / ha or 0.39 t / ha more than control. Double spraying of rapeseed plants of the winter hybrid Mercedes during the growing season of plants with the growth regulator "Vermiyodis" at a dose of 4 l / ha at sowing rates of 0.6 million / ha of similar seeds, the yield was 3.82 t / ha or 0.48 t / ha more control, for sowing rates of 0.8 million / ha of similar seeds - 4.15 t / ha or 0.54 t / ha more than control, for sowing rates of 1.0 million / ha of similar seeds - 3.68 t / ha or 0.45 t / ha more than control. In the variants where pre-sowing treatment of Cheremosh winter rape seeds with Vermiyodis growth regulator was carried out at a dose of 5 l / t and during the growing season, plants were sprayed with Vermiyodis growth regulator at a dose of 4 l / ha at sowing rates of 0.6 million / ha of similar seeds. yield was 3.91 t / ha or 0.57 t / ha more than control, for sowing rates of 0.8 million / ha of similar seeds - 4.24 t / ha or 0.63 t / ha more than control, for norms sowing 1.0 million / ha of similar seeds - 3.77 t / ha or 0.50 t / ha more than control.

scholarly journals Temporal Dynamics of Microcystins In Two Reservoirs With Different Trophic Status During The Early Growth Stage of Cyanobacteria

2021 ◽  
Author(s):  
Qingju Xue ◽  
Ming Kong ◽  
Liqiang Xie ◽  
Tong Li ◽  
Mengna Liao ◽  
...  
Keyword(s):  
Growth Stage ◽  
Trophic Status ◽  
Temporal Dynamics ◽  
Influence Factors ◽  
Environmental Parameters ◽  
Early Growth ◽  
Cyanobacterial Blooms ◽  
Organic Matters ◽  
Early Growth Stage ◽  
Density And Biomass

Abstract Harmful cyanobacterial blooms are increasing in frequency and severity, which makes their toxic secondary metabolites of microcystins (MCs) have been widely studied, especially in their distribution and influence factors in different habitats. However, the distribution of MCs on the early growth stage of harmful cyanobacteria and its influence factors and risks are still largely unknown. Thus, in the present study, two reservoirs (Lutian Reservoir and Lake Haitang) with different trophic status in China have been studied weekly from March to May in 2018, when the cyanobacteria communities were just in the early growth stage, to investigate the variation of MCs concentration and the relationships between MCs and environmental parameters. During the investigation, Lutian Reservoir and Lake Haitang were found to be mesotrophic and light eutrophic, respectively. In Lutian Reservoir, the concentration of EMCs was obviously higher than that of IMCs with a mean value of 0.323 and 0.264 μg/L, respectively. Meanwhile, the concentration of EMCs also fluctuated more sharply than that of IMCs. Congeners of IMC-YR and EMC-LR were respectively dominant in total concentrations of IMCs and EMCs. Unsurprisingly, in Lake Haitang, the concentrations of IMC and EMC were both significantly higher than that in Lutian Reservoir with a mean concentration of 0.482 and 0.472 μg/L, respectively. Differently, the concentration of MC-YR was dominant in both IMCs and EMCs, followed by MC-LR. In correlation analysis, the IMCs were significantly and positively correlated with the density and biomass of phytoplankton phyla and potential MCs-producing cyanobacteria and the parameters of water temperature (WT), nutrients and organic matters. Similar results were also observed for EMCs. While the different variation of MCs in two reservoirs might be primarily caused by the differences in WT, nutrients (especially phosphorus), organic matters and the composition of MCs-producing cyanobacteria. In addition, the coexistence of the dominant species of Pseudoanabaena sp., which can produce taste-and-odor compound of 2-methylisoborneol (2-MIB), might have significant impacts on the concentration and toxicity of MCs. Our results suggested that the risks posed by MCs at the early growth stage of cyanobacteria should also deserve our attentions, especially in mesotrophic water bodies.

scholarly journals Growth, Development, and Chemical Constituents of Edible Ice Plant (Mesembryanthemum crystallinum L.) Produced under Combinations of Light-emitting Diode Lights

HortScience ◽  
2018 ◽  
Vol 53 (6) ◽  
pp. 865-874 ◽  
Author(s):  
Thitipat Weeplian ◽  
Tsair-Bor Yen ◽  
Yunn-Shy Ho
Keyword(s):  
Vegetative Growth ◽  
Growth Stage ◽  
Chemical Constituents ◽  
Early Growth ◽  
Mesembryanthemum Crystallinum ◽  
Light Spectrum ◽  
Light Emitting ◽  
Early Growth Stage ◽  
Light Spectra ◽  
Late Growth

To investigate the effects of light treatments on the growth morphology and chemical constituents of Mesembryanthemum crystallinum L. plants, red (R), blue (B), far red (Fr), and white (W) light-emitting diodes (LEDs) were configured to provide different combinations of light spectra and photosynthetic photon flux densities (PPFDs). In Expt. 1, five light spectra of red/white (RW), red/white/far red (RWFr), red/white/high-intensity far red (RWFrD), red/blue (RB), and red/blue/far red (RBFr) were set up in two 3-layered racks with circulating hydroponic systems. In each light spectrum treatment, the distance between the LED lamps and the transplanting board was regulated to provide low PPFD and high PPFD treatments. In Expt. 2, the effect of Fr was further investigated in plants in the early and late growth stages. RWFr light was modified by covering the Fr lamps to become red/white without far red (RW−Fr) light during the early growth stage, and then removing the covers to provide the Fr spectrum red/white with far red (RW+Fr) during the later growth stage. This study suggested that high PPFD was not beneficial for promoting plant growth in any light spectrum treatment. Among light spectrum treatments at a PPFD of 215 ± 15 μmol·m−2·s−1, RW light produced higher vegetative growth. In the late growth stage, RW and RB combined with Fr light promoted reproductive growth, antioxidant activities, and secondary compounds, such as phenolic compounds, pinitol accumulation, and betacyanins. Therefore, RW (227 μmol·m−2·s−1), RW−Fr (162 μmol·m−2·s−1), and RB (162 μmol·m−2·s−1) are suggested for the early growth stage to promote vegetative growth. Then additional Fr light can be applied in addition to RW for secondary metabolite induction in the late growth stage.

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