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    Wyświetlanie 1-4 z 4
    Tytuł:
    Effect of Population Density and Spatial Arrangements of Pigeon pea (Cajanus cajan L. Millsp) on Productivity of Maize-Pigeon pea Intercropping
    Autorzy:
    Merkeb, Fitsum
    Powiązania:
    https://bibliotekanauki.pl/articles/1182881.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    LER
    Maize
    Pigeon pea
    monetary return
    population density
    spatial arrangement
    Opis:
    A field experiment was conducted to determine the effect of pigeon pea spatial arrangement and population density on the productivity of maize-pigeon pea intercropping. Treatments were consisted of two pigeon pea spatial arrangements and three population densities of pigeon pea using randomized complete block design with three replications. Spatial arrangement and population densities had significant influence on pigeon pea grain yield. Higher grain yield was obtained from the highest pigeon pea plant population density and 1:2 spatial arrangement (3.90 t/ha, 0.73 t/ha for maize and 3.74 t/ha, 0.75 t/ha for pigeon pea). Number of seeds/cob and biomass yield of maize were not significantly affected by pigeon pea spatial arrangement and population densities. The interaction effect of pigeon pea spatial arrangement and population density had a significant effect on maize biomass yield. The highest interaction effect on biomass yield was obtained from the lowest pigeon pea population density with 1:2 arrangements. Land use efficiency and monetary return was increased by increasing plant density and pigeon pea rows. Total LER of 1.16 and 1.24 was received from 1:2 and 250,000 plants ha-1. Under pigeon pea spatial arrangement of 1:2 and population density of 125,000 and 250,000 plants ha-1 maize-pigeon pea intercropping was found to be advantageous. The highest monetary return was also obtained from these treatments of 1:2 and 250,000 plants ha-1(28185 ETB ha-1 and 28106 ETB ha-1). Intercropping maize-pigeon pea gave a gross monetary advantage of 75% and 21% of their respective sole crops of maize and pigeon pea.
    Źródło:
    World Scientific News; 2016, 53, 3; 216-229
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of Different Commercial Rhizobial Strains on Soybean (Glycine max L.) Yield at Pawe District, Northwestern Ethiopia
    Autorzy:
    Merkeb, Fitsum
    Redi, Musefa
    Gebremedhin, Wubayehu
    Powiązania:
    https://bibliotekanauki.pl/articles/1192590.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Commercial Rhizobial Strain
    Glycine max L.
    Soybean
    Inoculation
    Nodule
    Opis:
    Two experiments were conducted during 2010 and 2011 main cropping seasons under different farmer fields at Pawe District of Northwestern Ethiopia in order to evaluate different commercially produced microbial inoculants, referred to as commercial rhizobial strains, on soybean yield. The first experiment was conducted with the aim of evaluating four commercial rhizobial strains (Legume fix, TSBF-531, TSBF-442 and MAR-1495) on soybean yield, while the second experiment conducted with the aim of evaluating and selecting the best rhizobial strain from the two rhizobial strains (Legume fix and MAR-1495). Non-inoculated soybean with and without the recommended rate (RR) of nitrogen (N) fertilizer treatments also included in the experiments. Treatments were arranged in a single replicate per field. Recommended rate of phosphorous (P) fertilizer was applied uniformly to all treatments. The two experiments analysis of variance indicated that there was significant difference (P < 0.05) among treatments in number of nodules, nodule weight, biomass yield and grain yield of soybean. Accordingly, the first experiment result indicated that the highest number of nodules, nodule weight, biomass yield and grain yield were recorded by using rhizobial strains of legume fix and MAR-1495. The second experiment result revealed that rhizobial strain MAR-1495 resulted consistent and highest number of nodules, nodule weight, biomass yield and grain yield of soybean. The increment in grain yield over the un-inoculated control, legume fix and full RR of N fertilized treatments recorded by MAR-1495 was 25.5, 9.7 and 9.9%, respectively. Moreover, inoculation of soybean seeds with rhizobial strain MAR-1495 also resulted to higher protein content in soybean plant tissue. Therefore, this study recommends use of the most suitable commercial rhizobial strain MAR-1495 for the study area to inoculate seeds before sowing for the production of soybean crop.
    Źródło:
    World Scientific News; 2016, 55; 15-26
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of intercropping sorghum with legumes to control striga (Striga hermonthica) in Pawe, North Western Ethiopia
    Autorzy:
    Merkeb, Fitsum
    Melkei, Zewdineh
    Bogale, Tesfa
    Takele, Abuhay
    Powiązania:
    https://bibliotekanauki.pl/articles/1182875.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    striga
    sorghum
    soybean
    groundnut
    ler
    Opis:
    Striga hermonthica, is a major constraint to sorghum production in Sub-Saharan Africa. The study was conducted to assess the potential role of intercropping sorghum with different legumes for control of striga. Two types of cropping system (simultaneous and relay) and two row arrangements (single and double alternate) were used for intercropping with groundnut and soybean. The experiment included a standard treatment of sole crop of sorghum, grou dnut and soybean. The experiment was laid out in a randomized complete block design (RCBD) with three replications for two cropping seasons of 2014 and 2015. From the result intercropping of sorghum with soybean and groundnut has significantly reduced the striga counts per plot as compared to sole sorghum. Lowest number of striga count (29.5) at vegetative stage and (19.7) at heading stages was recorded from simultaneous cropping of sorghum-soybean in double alternate row arrangements. The combined analysis result showed that sorghum grain yield and its components were significantly (P ≤ 0.05) affected by intercropping with groundnut and soybean. Significantly higher (P < 0.05) grain yield of sorghum (1.9 t ha-1) was obtained from single alternate row arrangement of sorghum-groundnut in relay intercropping. The study also demonstrated sorghum yield increment by 29.1% over the control sole crop. Higher yield was obtained from soybean intercropped with sorghum compared to groundnut due to higher competition for growth resources with sorghum. Land equivalent ratio of the system indicates that in both seasons of soybean and groundnut intercropped with sorghum resulted in a significant greater LER. The mean LER (1.9) of the system indicates that intercropping sorghum with this legume crops gave yield advantage and land productivity.
    Źródło:
    World Scientific News; 2016, 53, 3; 204-215
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Critical Level of Extractable Phosphorus for Maize (Zea mays L.) at Metekel Zone, Northwestern Ethiopia
    Autorzy:
    Redi, Musefa
    Gebremedhin, Wubayehu
    Merkeb, Fitsum
    Yimam, Mohamed
    Powiązania:
    https://bibliotekanauki.pl/articles/1191209.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Critical level
    fertilizer
    phosphorous
    maize
    soil test
    extraction methods
    Opis:
    Fertilizer recommendation based on choosing an effective soil nutrient extractants and calibrating soil tests against yield responses to applied nutrient has been little used in Ethiopia. An experiment was conducted during 2009, 2010 and 2011 cropping seasons in 35 different farmer fields from five Districts of Metekel zone. Six levels of phosphorus (0, 10, 20, 30, 40 and 50 kg ha-1) arranged in Randomized Complete Block Design (RCBD) with three replicates were used to determine the critical level of phosphorus (P) for maize and to compare Bray II, Olsen and Mehlich III P extraction methods. Grain yield of maize responded positively and significantly to P fertilizer application of the study area. Compared with the control, grain yield increased 19.8 to 35.3% by applications of P fertilizers. Extractable P concentration extracted after three weeks of planting by using three extraction methods were significantly differed among P fertilizer rates. Using the Cate and Nelson graphical method, the critical levels of soil extractable P were 12, 8 and 10 mg P kg-1 soil for Bray II, Olsen and Mehilich III extraction methods, respectively. Results shows that at values less than these critical levels of extractable P, P fertilizers should be applied to increase maize yield. The Bray II P was more correlated (r = 0.38) with relative maize grain yield than and Olsen and Mehlich III extraction methods. In addition, the quantities of P extracted by the three extractants were in the following order: Bray II > Mehlich III > Olsen P extraction method. The result indicated that Bray II was found to be the most suitable as soil testing method for estimating extractable P in the study area.
    Źródło:
    World Scientific News; 2016, 54; 14-26
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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