Impact of Plant Spacing, Hand Weeding and Herbicides on Weed Invasion, Yield and Yield Components of Faba Bean (Vicia faba L.) in North Shewa, Central Highlands of Ethiopia

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The production of faba bean (Vicia faba L.) in Ethiopia is hindered by various weeds, diseases and insect pests. Unchecked weed populations can drastically decrease faba bean yield by 80%–90% if not eradicated during the critical competition period. This research aimed to assess the influence of plant spacing and herbicide use on weed invasion, yield and yield factors of faba bean during the 2000 and 2001 cropping seasons. Three inter‐ and intrarow plant spacings (35 cm × 15 cm, 40 cm × 10 cm and 45 cm × 5 cm) and four weeding methods (two instances of hand weeding, usage of Gallant Super and Fusilade herbicides and a nonweeding treatment as a control) were employed using a randomized complete block design with three replications in a factorial arrangement. The combined effects of plant spacing and weed management practices had a significant impact on the number of tillers per plant (NTPP). On the average of the two cropping seasons, the maximum NTPP (3.53) was observed on 35 cm × 15 cm plots treated with twice hand weeding management. On the average of the cropping seasons and plant spacing, the highest number of pods per plant (NPPP) (37. 69), number of seeds per pod (NSPP) (3.73) and weight of 100 seeds 62.77 g) were recorded in twice hand weeded plots. On the average of the cropping seasons, the highest grain yield (GYL) (6401.8 kg ha−1) was achieved in twice hand weeded plots with 45 cm × 5 cm plant spacing. The findings suggest that using 45 cm × 5 cm spacing in conjunction with twice hand weeding is the most effective practice for faba bean production.

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  • International Journal of Plant &amp; Soil Science
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Faba bean (&amp;lt;i&amp;gt;Vicia faba&amp;lt;/i&amp;gt; L.) is a multi-purpose crop owing to its immense economic and ecological benefits. Genetic variability assessment for agronomic traits is a crucial step in improving the yield and yield components of the crop. Phosphorus deficiency seriously affects the yield of faba bean. The present study was conducted to evaluate the genotypic variability of faba bean for agronomic traits. Twenty and 12 genotypes, in the field and greenhouse respectively, were planted under two P fertilizer regimes (0 and 46kg/ha). Analysis of variance indicated highly significant (P&amp;lt;0.01) genotypic variation for most of the agronomic traits under both field and greenhouse; while grain yield (GY), days to fifty percent flowering (DFF), number of pods per plant (NPP) and days to 90% maturity (DNM) had significant genotype by location interaction. The agronomic performance of P-unfertilized (P-) treatments was significantly reduced; with the effect ranging from -4.6% for DNM to 20.3% for NPP in the field; and from -3.6% for DFF to 21.6% for shoot dry weight per plant (SDWP) in the greenhouse. Correlation analysis indicated that most traits were strongly correlated to one another; with consistently significant correlation among GY, DFF, and NPP. Biomass production per day (BPD), GY, SDWP, DNM, and NPP were the highest contributors to the genetic variation. Mean comparisons and biplot analysis results revealed that genotypes Moti, Gebelcho, Dosha, Tumsa, and Didea had superior agronomic performance under all conditions. The study revealed the availability of genotypic variation among the faba bean genotypes for agronomic traits.

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  • Research Article
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Evaluation of Combined Weed Control Practices on Weed Dynamics, Yield and Economic Return in Common Bean (Phaseolus vulgaris L.) at Wolaita Sodo, Southern Ethiopia
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The field experiment was conducted in Wolaita Zone, Southern Ethiopia, to evaluate different weed management practices on weed dynamics, yield and economic return in common bean in 2014. The experiment comprised of fifteen treatments which included two herbicides (s-metolachlor and pendimethalin) applied as pre-emergence alone and in different combinations, hand weeding and hoeing, weedy check all with and without mulching and weed free check laid out in randomized block design with three replications. The application of pendimethalin 1.0 kg ha -1 + mulching at 2 weeks after crop emergence (WAE) resulted in significant decrease in total weed density over weedy. Weed dry weight varied in response to weed significantly management practices at 2 WAE. However, at 12 WAE this has no significant difference with pendimethalin 1.0 kg ha -1 + hand weeding and hoeing 5 WAE, s-metolachlor 0.75 kg ha -1 + pendimethalin 0.75 kg ha -1 + mulching and hand weeding and hoeing at 2 and 5 WAE. At 12 WAE, the highest weed control efficiency (99.8%) was obtained with hand weeding and hoeing at 2 and 5 WAE which is statistically at parity with pendimethalin 1.00 kg/ha+ hand weeding and hoeing 5 WAE (99.4%. Weed infestation throughout the growing period suppressed the plant height by about 29.6 to 95.3% compared to other treatments. The highest number of pods per plant was recorded under complete weed free and it was statistically in parity with pendimethalin at 1.0 kg ha -1 + hand weeding and hoeing 5 WAE. Weedy check resulted in significant decrease in number of pods per plant which varied between 28.6 and 54.4% over other treatments. The highest number of seeds/pod was also obtained with complete weed free plots but in addition to pendimethalin at 1.0 kg ha -1 + hand weeding and hoeing 5 WAE, Weight of hundred seeds was maximum with complete weed free which was statistically in parity with the application of pendimethalin at 1.0 kg ha-1 + hand weeding and hoeing at 5 WAE and two hand weeding and hoeing 2 and 5 weeks after crop emergence (WAE) treatments. Highest grain yield (1982 kg ha -1 ) and net returns (ETB 17362 ha -1 ) was obtained with the application of pendimethalin 1.0 kg ha -1 + hand weeding and hoeing 5 weeks after crop emergence. Generally, it could be concluded that pendimethalin 1.0 kg ha-1 combined with one hand weeding and hoeing at 5 WAE was the most appropriate method for effective weed management and profitable production of common bean. Keywords: Herbicides combination, mulch, pendimethalin, pre-emergence, s-metolachlor, yield, economic feasibility DOI: 10.7176/JBAH/12-6-01 Publication date: March 31 st 2022

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This study reports the interaction of rhizobium strains and varieties on yield and yield components of faba bean and the economic feasibility of the inoculant use in faba bean production. The two years field experiments used a split-plot design that involved six elite rhizobium strains as the main plot and three faba bean varieties as sub-plot treatments. Non-inoculated plants with N fertilizer and without fertilizer were included as +N (46 kg ha−1) and −N controls, respectively. Phosphorus (P) was applied as triple super-phosphate at the time of sowing. Data on yield and yield components were collected and statistically analyzed. Partial budget, dominance, and marginal rate of return analysis were conducted to identify profitable rhizobial strain-variety combinations for each study location. Rhizobium strains NSFBR-15, TAL_1035 and NSFBR-12 increased grain and haulm yield of faba bean more than N fertilizer across the study locations. Location, rhizobium strain, and variety interaction influenced yield and yield components of faba bean. Economic analysis document that rhizobium inoculation for symbiotic N fixation is more profitable for supplying N to faba bean than N fertilizer application. Rhizobium strains NSFBR-15, TAL_1035, and NSFBR-12 with all faba bean varieties resulted in the highest revenue with a higher marginal rate of return at all study locations.

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Faba bean (Vicia faba L.) is an economically important crop in Ethiopia. The productivity of Faba bean in Ethiopia has declined due to poor management practices of Bio fertilizer rates usage. This study evaluated the effect of Rhizobium inoculation rates on Yield and Yield Components of Faba Bean (Vicia faba L.) during the 2018 main cropping season. Results indicated that Rhizobium inoculation significantly increased the number of nodules, effective nodules, plant height, and pods per plant. The highest grain yield (2811 kg ha⁻¹) and harvest index (40%) were achieved at 500 g ha⁻¹, while the maximum biomass yield (7089 kg ha⁻¹) occurred at 750 g ha⁻¹. Nodulation and growth improvements were attributed to enhanced nitrogen fixation and nutrient uptake. The study concludes that applying 500–750 g ha⁻¹ of Rhizobium bio-fertilizer can substantially improve Faba bean productivity in nutrient-deficient soils.

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Growth and Yield Response of Cowpea (Vigna unguiculata L. Walp.) to Integrated Use of Planting Pattern and Herbicide Mixtures in Wollo, Northern Ethiopia
  • Jan 1, 2016
  • Advances in Crop Science and Technology
  • Getachew Mekonnen + 1 more

To assess the integrated effect of planting pattern and low dose herbicide mixtures on weeds and growth, yield attributes and yields of cowpea, and to determine the economic feasibility of different weed management practices in cowpea, a field experiment was conducted at Sirinka Agricultural Research Center experimental sites at Jari and Sirinka in Northern Ethiopia during the 2014 main cropping season. There were 16 treatments comprising the combinations of two planting patterns (60 cm × 10 cm, 45 cm × 15 cm) and eight weed management practices (s-metolachlor 2.0 kg ha-1, s-metolachlor at 1.0 kg ha-1+hand weeding and hoeing 35 weeks after crop emergence (WAE), pendimethalin at 1.0 kg ha-1+hand weeding and hoeing 5 WAE, s-metolachlor at 1.0 kg ha-1+pendimethalin at 1.0 kg ha-1, s-metolachlor at 1.0 kg ha-1+pendimethalin at 0.75 kg ha-1, s-metolachlor at 0.75 kg ha-1+pendimethalin at 1.0 kg ha-1, hand weeding and hoeing 3 WAE and weedy check. The treatments were laid out in factorial combination in a randomized complete block design with three replications. The highest number of pods per plant, number of seeds per pod, and hundred seed weight were obtained from the combination of s-metolachlor at 1.0 kg ha-1+hand weeding 5 WAE along with 60 cm × 10 cm at Sirinka. Higher (3092 kg ha-1) grain yield was recorded at Sirinka than at Jari (2714 kg ha-1). The highest (53460 ETB ha-1) gross benefit was obtained from s-metolachlor at 1.0 kg ha-1+hand weeding and hoeing 5 WAE, followed by pendimethalin at 1.0 kg ha-1+hand weeding and hoeing 5 WAE (46737 ETB ha-1). Therefore, managing the weeds with the application of 1.0 kg ha-1 of s- metolachlor+hand weeding and hoeing 5 WAE along with 60 cm × 10 cm proved to be the most feasible practice. Alternate herbicides for the control of X. strumarium infested fields in the study area needs to be explored.

  • Research Article
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Correlations and path analysis for quantitative characteristics in semi-prostrate cowpea bean genotypes (Vigna unguiculata (L.) Walp)
  • May 1, 2020
  • Revista Colombiana de Ciencias Hortícolas
  • Hermes Araméndiz-Tatis + 2 more

The cowpea is the most important legume in the Colombian Caribbean, due to its positive impact on the food and nutritional security of low-income rural families. It is cultivated by small producers, but its yields per hectare do not exceed 600 kg, due to the use of obsolete cultivars. The objective of the research was to estimate the correlations between seven quantitative characters and the path analysis between grain yield and six quantitative characters, with the results of the evaluation of 10 genotypes of semi-prostrate growth habit, high grain yield, grown in eight environments of the humid and dry tropics of the Colombian Caribbean region, under the randomized complete blocks design, with four repetitions. Significant differences between environments, genotypes and genotype x environment interaction were detected. Genotypic correlations were of greater magnitude than phenotypic, highlighting the correlation between grain width (GW) and grain yield (GY), rP = 0.69 *, rG = 0.78 *, also between the weight of 100 seeds (100SW) and GW, rP = 0.97 **, rG = 0.99 **. The characters GW and number of pods per plant (NPP) had positive direct effects on the GY, with an indirect negative effect of NPP by way of GW, while the height of the first pod (HFP), the number of seeds per pod (NSP) and the 100SW directly and negatively influenced the GY of the 10 semi-prostrate cowpea cultivars.

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  • 10.1080/09064710.2018.1562564
Agronomic evaluation and identification of potential cowpea (Vigna unguiculata L. Walp) genotypes in South Africa
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  • Acta Agriculturae Scandinavica, Section B — Soil & Plant Science
  • Abe Shegro Gerrano + 2 more

ABSTRACTCultivar development of cowpea with increased grain yield depends on evaluation and selection of genetically unique and complementary breeding lines. The objective of this study was to evaluate cowpea collections using agronomic traits to select promising parents to develop breeding population. Twenty-two cowpea genotypes were field evaluated using a randomised complete block design with three replications in two locations in South Africa. Analysis of variance revealed significant genotypic (G) and locations (L) differences for all agronomic traits evaluated. Significant differences were also observed for most of the traits due to G X L, G X Year (Y), L X Y and G X L X Y interactions effects. The genotypes tested at two locations showed considerable genetic variation for the following agronomic traits that varied for number of leaves (NL) (20.08–179.78), leaf length (LL) (12.36–67.72 cm), leaf width (LW) (4.78–22.02 cm), number of branches (NB) (6.81–13.85), number of pods per plant (NPPP) (14.33–54.04), number of seeds per pod (NSPP) (11.7286.28), pod diameter (PD) (5.75–22.73 mm), plant height (PH) (6.57–233.71 cm), pod length (PL) (3.94–100.92 mm), hundred seed weight (HSWt) (8.11–49.52 g) and grain yield (GY) (0.10-1.48 t ha−1). Grain yield was significant and positively correlated with all of the traits except leaf length. The principal component analysis (PCA) identified four principal components (PCs) contributing to 73.62% of the total explained variation amongst the tested genotypes. The selected cowpea genotypes for most of agronomic characteristics are useful and candidate genetic resources for the development of breeding population in cowpea breeding and enhanced production and productivity for food and nutrition in the country.

  • Research Article
  • Cite Count Icon 2
  • 10.3923/pjbs.2012.192.197
Agronomic Importance of First Development of Chickpea (Cicer arietinum L.) Under Semi-arid Conditions: II. Seed Imbibition
  • Feb 1, 2012
  • Pakistan Journal of Biological Sciences
  • H Ulukan + 4 more

Due to the slowness growth and weakness of the first developments of chickpea (Cicer arietinum L.), it could not combated with weeds and easily caught up by Ascochyta blight (Ascochyta rabiei (Pass) Labr.) disease. Additionally, due to biotic and abiotic stress factors, esp. at the late sowing, important seed yield losses could be happened. To be able to avoid from them is only possible to accelerate of its first development as possible as. So, one of the best solutions to is to use chemical compounds such as Humic Acid (HA) known soil regulator under the semi-arid conditions. With this aim this research was performed in a Randomized Complete Block Design (RCBD) with four replications under semi-arid field conditions during (2008/2009) and (2009/2010) in Turkiye. Two cultivars (V1 = Gokce and V2 = Ispanyol) and four seed imbibition methods (A0 = 0, A1 = Tap Water, A2 = 1/2 Tap Water + 1/2 Humic acid (HA), A3 = Full HA, as w/w) and seven yield components Plant Height (PH), Number of Branches per Plant (NBP), Number of Pods per Plant (NPP), First Pod Height (NFP), Number of Seeds per Pod (NSP), Seed Weight per Plant (SWP) and 100-Seed weight (HSW) were investigated. The PH and FPH were affected the A0, the NBP, NPP and NSP were affected the A2 and the SWP and HSW were given the varied but not clear responses according to varieties for all the parameters in A1. The A0 and A1 were encouraged the germination and top soil of the plant but, the A2 to A3 were encouraged root system's development. It was concluded that the A2 is a promising method which makes the maximum and positive effect to the first development of the chickpea agronomy under the semi-arid conditions.

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