scholarly journals Evaluación de diferentes niveles críticos de Empoasca spp. basado en porcentaje de hojas infestadas con ninfas en el cultivo de frijol

2016 ◽  
Vol 1 ◽  
pp. 83
Author(s):  
R. Escobar ◽  
O. Cáceres ◽  
K. Andrews ◽  
R. Cave
Keyword(s):  
Analysis Of Variance ◽  
Critical Level ◽  
Block Design ◽  
Rate Of Return ◽  
Critical Levels ◽  
Marginal Rate ◽  
Combined Analysis ◽  
Randomized Complete Block Design ◽  
Marginal Rate Of Return ◽  
Net Benefits

In May, 1988, trials were Initiated to determine optimum critical levels for control of Empoasca spp, based on percentage of nymph Infested leaves. The efficiency of this sampling comparing It to absolute values obtained from Insect traps was also evaluated. A randomized complete block design was employed at two locations with three replications and five treatments per location. Insecticides were applied when leaves had infestation percentages of 0, 15, 30 and 45 %. An added check was also included without insecticide applications. To each treatment, “dimetoato” was applied to determine the critical level. Plot sizes were 49 in’ while harvest areas were 4 m2 taken from the center of each plot. The combined analysis of variance Indicated significant differences between yield amongst the applied treatments (P<0.01). Yield increases of 0 and 5% (1.1 and 1.2 t ha-1, respectively) were significantly higher than the check (0.8 t/ha) for treatments 30 and 45% defined above. The correlation between porcentage of infested leaves and number of nymphs determined from the traps was significant (r = 0.78) at Corral Falso and (r = 0.56) at San Jeronimo. The treatment with 15 % infested leaves provided the largest net benefits. The marginal rate of return for this critical level was 5 and 20% for San Jeronimo and Corral Falso respectively.

scholarly journals Evaluation of Blended Fertilizer Formulas under Limed Condition of Acid Soil on Soybean (Glycine max) at Asossa District of Benishal-gul Gumuz Regional State

2020 ◽  
pp. 18-29
Author(s):  
Teriku Legesse ◽  
Bakala Anbessa ◽  
Dassalegn Temene ◽  
Getahun Dereje
Keyword(s):  
Yield Components ◽  
Acid Soil ◽  
Block Design ◽  
Growth And Yield ◽  
Rate Of Return ◽  
Net Benefit ◽  
Marginal Rate ◽  
Exchangeable Acidity ◽  
Budget Analysis ◽  
Marginal Rate Of Return

Purpose: To evaluate the blended fertilizer formulas types, under unlimed limed condition of Asossa acid soil on soybean in Benishagul Gumuz of Ethiopia. Methods: Two factorial RCB design with three replications was used in the investigation. Five types of blended fertilizer formulas were tested under limed and unlimed condition in Factorial Randomized Complete Block Design. Lime and blended fertilizer types were used as factor. The amount of lime that was applied at each location was calculated on the basis of the exchangeable acidity, bulk density and 15 cm depth of the soil. One mole of exchangeable acidity would be neutralized by an equivalent mole of CaCO3. Accordingly, the amount of lime for this particular activity would be uniformly applied for all plots at 1.5 times of the exchangeable acidity (Equation 1) and incorporated in to the soil a month before seed sowing. Results: The effects of applied lime (CaCO3) and fertilizer types on growth and yield components of soybean were non-significantly (P>0.05) influenced except 100 seed weight, whereas the lime by blended fertilizer types interaction effects were not-significantly (P>0.05) affect all growth and yield components of soybean (Table 2). The highest plant height (71.58 cm) was obtained from NPKSZnB (Formula 5 modified) fertilizer type, however statistically non-significant from the other treatments. Conclusion: The partial budget analysis indicated that, it was not necessarily based on the highest marginal rate of return, rather based on the minimum acceptable marginal rate of return and the treatment with the high net benefit, relatively low variable cost together with an acceptable MRR becomes the tentative recommendation. Therefore we recommend the treatments (100 kg /ha NPSB) that have acceptable marginal rate of return, relatively high net benefit and relatively small total cost of production for soybean production in Asossa zone.

scholarly journals Evaluation of durum wheat varieties for yield and yield related traits in highland areas of southern Ethiopia

2021 ◽  
Vol 11 (1) ◽  
pp. 26-28
Author(s):  
S Shibeshi ◽  
D Kassa
Keyword(s):  
Grain Yield ◽  
Durum Wheat ◽  
Plant Height ◽  
Analysis Of Variance ◽  
Block Design ◽  
Southern Ethiopia ◽  
Wheat Varieties ◽  
Combined Analysis ◽  
Randomized Complete Block Design ◽  
Positive Correlations

Durum wheat productivity in Ethiopia is hindered by different factors mainly lack of improved adapted varieties for specific locations. This experiment was done to identify the most performing durum wheat varieties in the tested environment. The average productivity of the tested genotypes were evaluated at two locations (Alicho and Analimo) using randomized complete block design with four replication for two consecutive years (2016 and 2017). The experimental material consists of seven improved durum wheat genotypes. The Combined analysis of variance showed significant (P<0.05) difference among tested genotypes on collected parameter indicating the presence of adequate variability. The highest average grain yield recorded was 4446 kg ha-1 from Hitosa variety while the lowest obtained was 3634 kg ha-1 from Denbi variety. Grain yield had strong positive correlations (P<0.01) with plant height, number of seed spike-1 and biomass. Int. J. Agril. Res. Innov. Tech. 11(1): 26-28, June 2021

Faba bean gall (Olipidium viciae Kusano) disease management using fungicides in North Shewa, Highlands of Ethiopia

2021 ◽  
Vol 1 (1) ◽  
pp. 001-005
Author(s):  
Belachew Bekele Tiruneh ◽  
Sisay Argaye Bereda
Keyword(s):  
Disease Management ◽  
Grain Yield ◽  
Disease Severity ◽  
Faba Bean ◽  
Hot Spot ◽  
Block Design ◽  
Rate Of Return ◽  
Marginal Rate ◽  
Significant Difference ◽  
Marginal Rate Of Return

Faba bean gall becomes the worst problem for the crop production. The diseases can cause up to complete crop failure. Studies showed that, applications of some fungicides and seed dressings have certain effects of reducing faba bean gall diseases and increases yield. Thus, the study aims to select best effective and economical fungicide for faba bean gall disease management. The experiment was conducted at farmers’ field on hot spot areas to manage the disease using fungicides in 2019/20 cropping season. Randomized complete block design with three replications was used. Nativo SC 300, Eminant star, Rex-Dou and Mancozeb 80 WP fungicides were applied as manufacturers’ recommendations. Significant difference between plots in plant height, disease severity, area under disease progress curve, grain yield and thousand kernel weights were recorded. The highest (46.67%) disease score were recorded in control plots followed by Rex-Dou (40.0%) sprayed plots. Whereas the lowest, disease severity (15.11%) were recorded from Eminant star sprayed plots. The highest grain yield was recorded in Eminant star (3.08 ton ha-1) sprayed plot followed by Nativo Sc 300 (3.01 ton ha-1) and Mancozeb 80 WP (2.54 ton ha-1) sprayed plots respectively. Eminant star sprayed plots also gave the highest economic benefit ETB (102770.0) and marginal rate of return (1678.46) followed by Nativo Sc 300 with net benefit of ETB (99190.0) and a marginal rate of return (925.40) were received. Pod per plant was not showed significant difference between plots.

scholarly journals EFFECTS OF BELT SPEED, PRESSURE AND GRIT SIZE ON THE SANDING OF Pinus elliottii WOOD

CERNE ◽  
2015 ◽  
Vol 21 (1) ◽  
pp. 45-50 ◽  
Author(s):  
Manoel Cléber de Sampaio Alves ◽  
Luiz Fernando Frezzatti Santiago ◽  
Marcos Tadeu Tiburcio Gonçalves ◽  
Ivaldo De Domênico Valarelli ◽  
Francisco Mateus Faria de Almeida Varasquim
Keyword(s):  
Surface Roughness ◽  
Analysis Of Variance ◽  
Block Design ◽  
Pinus Elliottii ◽  
Grit Size ◽  
Significance Level ◽  
Belt Speed ◽  
Randomized Complete Block Design ◽  
Four Levels ◽  
Temperature Levels

The present paper aims to evaluate the influence of the factors (belt speed, pressure and grit size) on the output parameters (temperature and surface roughness) for Pinus elliottii wood sanding, processed parallel to the fibers. Three levels of belt speed, three levels of pressure and four levels of grit size were employed, with six replicates for each process, totaling 216 observations. The experiment conducted under a randomized complete block design (RCBD). The results were analyzed employing the analysis of variance (ANOVA) with 5% of significance level. Only grit sizes were significant to different temperature levels. The same outcome was observed for roughness, where only grits sizes were significant. No interaction between the pressure and belt speed factors were observed for all the results analyzed.

scholarly journals EFEKTIVITAS EKSTRAK DAUN NIMBA (Azadirachta indica A. Juss) DALAM MENGATASI SERANGAN LIRIOMYZA SPP PADA TANAMAN BAWANG MERAH LEMBAH PALU

2019 ◽  
Vol 9 (2) ◽  
pp. 66-71
Author(s):  
Arfan ◽  
Ratnawati ◽  
Hasmari Noer ◽  
Lisa Indriani ◽  
Asli ◽  
...  
Keyword(s):  
Analysis Of Variance ◽  
Azadirachta Indica ◽  
Attack Rate ◽  
Block Design ◽  
Field Research ◽  
Leaf Extracts ◽  
The Real ◽  
Randomized Complete Block Design ◽  
Central Sulawesi

The purposes of this research the examine the effectiveness various concentrations neem leaf ekstract on the intensity of attack Liriomyza spp on shallot Lembah Palu variety . Field research was carried out in Guntarano Village, Tanantovea Subdistrict, Donggala Regency, Central Sulawesi.  This research conducted from February to April 2016 .The experiment was done using Randomized Complete Block  Design with three replications, consists of six  treatments, i.e. P0 : control (without aplication neem leaf ekstract); P1: neem leaf ekstract 10 gr /litre;  P2 : neem leaf ekstract 20 gr / litre; P3 : neem leaf ekstract 30 gr / litre; P4 : neem leaf ekstract 40 gr / litre; P5 : neem leaf ekstract 50 gr / litre. To find out the effect of threatment, the analysis of variance, and the real influence is continued with the standard  ά = 0.05 BNT test.  The results showed that use of seed and leaf extracts of neem plant can control Liriomyza spp attack, only 3,04 percent of attack rate and shallot Lembah Palu variety productivity is 3,02/area.

scholarly journals PERBAIKAN REKOMENDASI PAKET PHT UNTUK PENGENDALIAN HAMA Helicoverpa armigera Hbn. PADA TANAMAN KAPAS

2020 ◽  
Vol 9 (2) ◽  
pp. 63
Author(s):  
SKI HADIYANI ◽  
DA SUNARTO ◽  
A. A A. GOTHAMA ◽  
S. A. WAHYUNI
Keyword(s):  
Gossypium Hirsutum ◽  
Helicoverpa Armigera ◽  
Rate Of Return ◽  
Research Station ◽  
Neem Seed ◽  
Marginal Rate ◽  
Action Threshold ◽  
Helicoverpa Armígera ◽  
Marginal Rate Of Return ◽  
Nuclear Polyhedrosis

<p>Rekomendasi pengendalian hama terpadu (PUT) hama utama lanaman kapas, akan tetapi secara tcknis dan ekonomis masih sulit diterapkan oleh petani. Unluk memperbaiki rekomendasi itu maka dikaji efisiensi pemanfaatan parasitoid Trichogrammatoidea armigera N&amp;N. HeUcoverpa armigera nuclear polyhedrosis virus (//oNPV). dan insektisida nabati serbuk biji mimba (SBM) terhadap // armigera. Penelitian dilaksanakan pada musim lanam 199899 di kebun Instalasi Penelitian Tanaman Tembakau dan Serat, Asembagus, Situbondo, Jawa Timur. Rancangan penelitian adalah acak kelompok dengan 6 perlakuan, dan 3 ulangan Ukuran plot adalah 50 m x 50 m Pada rekomendasi standar rakitan komponen PITT, perlakuan yang ditambahkan adalah (1) penyemprotan SBM. (2) pelepasan T. armigera ■ penyemprotan SBM, (3) pelepasan '/'. armigera ' penyemprotan insektisida kimia, (4) penyemprotan faNPV I penyemprotan insektisida kimia. (5) penyemprotan insektisida kimia, dan (6) lanpa perlakuan (kontrol). Penyemprotan SUM, //oNPV, dan insektisida kimia dilakukan apabila populasi ulat // armigera mencapai ambang pengendalian (4 tanaman lerinfestasi per 25 tanaman). dan pelepasan 7 armigera dilakukan apabila populasi telur //. armigera mencapai ambang pelepasan (25 telur per 25 tanaman) Penyemprotan SBM, pelepasan T. armigera dan penyemprotan //oNPV dapat ditambahkan pada rekomendasi standar rakitan komponen PHT. Penambahan penyemprotan SBM pada rekomendasi standar rakitan komponen PITT adalah paling cisien diantara tiga komponen PITT yang ditambahkan, memberikan eisiensi (Marginal Regional Rate of Return. MRR) scbasar 3.64 dengan produktivitas kapas berbiji 1 562 kgha (meningkatkan 392 kg atau 25%) dan biaya penyemprotan Rp 172 267 (menurun Rp 259 883 atau 60%).</p><p>Kata Kunci : Azadirachla tndica A. Juss, Trichogrammatoidea armigera N&amp;N, WoNPV, HeUcoverpa armigera Hbn . PITT, Gossypium hirsutum I.</p><p> </p><p><strong>ABSTRACT </strong></p><p><strong>Improved 1PM recomendation package for controlling Helicoverpa armigera Hbn. on coton</strong></p><p>An experimcnl on Ihe use of IPM components for controlling HeUcoverpa armigera Hbn. as ihe pests of cotton was conducted in Asembagus Research Station during cotton planting season 1998/99 Ihe objective of this experiment was to assess the usefulness of Trichogrammatoidea armigera N&amp;N., //oNPV, and botanical insecticide (neem seed powder) in improving the IPM recommendation package, so that it can be adopted by farmers This experiment was arranged in randomized blok design with 6 treatments and 3 replicates. Ihe size of each plot was 50 m X 50 m Ihe treatments comprise: (1) neem spray; (2) T. armigera release neem spray; (3) T. armigera release i insecticide spray; (4) //(A'I'V spray I chemical. (5) chemical; and (6) control (unlrcatment) were added lo the standar IPM recommendation package. Neem, /YoNPV, and chemical spray was done whenever population of H. armigera larvae reached action threshold (4 infected plants 25 plants) and release of T. armigera was done whenever population of H. armigera eggs reached "release threshold" (25 cggs/25 plants) Neem seed powder spray, T. armigera release, and //oNPV spray could be added to (he standar IPM recomendation package. Ihe most efficient among this three components was neem seed powder spray. Which gives eicjency Marginal Rate of Return (MRR) 3 64, cotton seed productivity I 562 kgha (increase 392 kg or 25%) and spraying cost Rp 172 267 (decrease Rp 259 883 or 60%).</p><p>Key words: Azadirachla indica A. Juss., Trichogrammatoidea armigera N&amp;N, 7/aNPV, Helicoverpa armigera Hbn , IPM, Gossypium hirsutum I.</p>

Sunola response to nitrogen fertilization

1996 ◽  
Vol 76 (4) ◽  
pp. 783-789 ◽  
Author(s):  
H. J. Beckie ◽  
S. A. Brandt
Keyword(s):  
Field Experiments ◽  
Black Soil ◽  
N Fertilization ◽  
Rate Of Return ◽  
N Leaching ◽  
Marginal Rate ◽  
Brown Soil ◽  
Nitrate N ◽  
Soil Site ◽  
Marginal Rate Of Return

The response of sunola (Helianthus annuus L. 'AC Sierra') to nitrogen (N) fertilization under conventional and direct seeding tillage systems was examined in field experiments at sites in the semiarid Dark Brown and subhumid Black soil climatic zones over a 2-yr period of normal to above-normal growing season precipitation. Urea-N fertilizer was banded at the time of seeding at varying rates to a maximum of 150 kg N ha−1. Tillage treatment did not influence sunola response to N fertilization. Sunola seed yield responded greater to fertilization at the Black soil site compared with the Dark Brown soil site in both years. Sunola harvest indices were comparable across sites and years, ranging from 0.10 to 0.18. Seed oil concentration averaged about 4% higher at the Black compared with the Dark Brown soil site, and responded to fertilization differently between locations. Sunola water use efficiency was markedly higher in 1994 than in 1993 at both sites, primarily due to lower water consumption by the crop. Fertilizer recommendations can be based on a desired yield goal or marginal rate of return. A minimum acceptable marginal rate of return of 1, 1.5 and 2 times the cost of the fertilizer, indicated that fertilizer N plus soil nitrate-N levels of greater than 94, 66 and 38 kg N ha−1, respectively, were uneconomical at Scott; respective rates at Melfort were 183, 174 and 154 kg N ha−1. However, fertilizer rates in excess of 100 kg N ha−1 in the Black soil climatic zone can result in potentially high levels of residual nitrate-N in the soil profile, and thus have greater potential for N leaching and denitrification losses. Key words:Helianthus annuus L., nitrogen

scholarly journals Urochloa Hybrid Submitted to Biostimulant Application in Grazing Simulation

2019 ◽  
Vol 11 (6) ◽  
pp. 556
Author(s):  
Luara Cristina de Lima ◽  
Renato Aurélio Severino de Menezes Freitas ◽  
Leandro Martins Barbero ◽  
Regina Maria Quintão Lana ◽  
Fernanda Carvalho Basso ◽  
...  
Keyword(s):  
Analysis Of Variance ◽  
Block Design ◽  
Minas Gerais ◽  
Randomized Complete Block Design ◽  
Regression Test ◽  
Dead Material ◽  
The City ◽  
Different Doses ◽  
Rate Of Accumulation

The objective of this work was to evaluate the performance of Urochloa hybrid Convert HD364 applied in different doses as a vegetable biostimulant under grazing simulation in intermittent stocking in the city of Uberl&acirc;ndia, Minas Gerais. The treatments consisted of a control (absence of biostimulant) and in 5 doses of biostimulant, 0.25; 0.5; 0.75; 1.0 and 1.25 L ha-1, in a randomized complete block design with 4 replicates. Productive and qualitative parameters were evaluated. The data were submitted to analysis of variance, using for the comparison of means, the Regression test at 5% of significance. The biostimulant promotes an increase in the accumulation of DM and in the rate of accumulation of forage, leaves and stems of Urochloa hybrid and reduction in the percentage of dead material and the L:S ratio of Urochloa hybrid.

scholarly journals Estimation of Heterosis of Yield and Yield-Related Traits in the African Eggplant (Solanum Aethiopicum) Hybrids

2018 ◽  
Vol 6 (2) ◽  
pp. 39-45
Author(s):  
Esther T. Akinyode ◽  
Justina B.O. Porbeni ◽  
David K Ojo ◽  
Olufemi O. O. Pitan ◽  
Adenike O. Olufolaji ◽  
...  
Keyword(s):  
Field Experiment ◽  
Analysis Of Variance ◽  
Significant Variation ◽  
Block Design ◽  
Leafy Vegetable ◽  
Duncan Multiple Range Test ◽  
Randomized Complete Block Design ◽  
Cropping Seasons ◽  
Pure Lines ◽  
Range Test

African eggplant is an important fruit and leafy vegetable in Africa. Heterosis over mid and better parents was estimated in eight crosses of eggplant involving eight pure lines in a field experiment in 2012 and 2013 cropping seasons. The experiment was laid out using a randomized complete block design with three replications. Collected data was subjected to analysis of variance and significant differences were further subjected to Duncan Multiple Range Test. The aim of this study was to identify superior hybrids that can be advanced in the eggplant breeding program for improved yield and related traits. Significant variation was observed among all traits measured for the parents and hybrids. The highest fruit number was observed in NHS10-40 and in NHS 10-71 x NHS 10-40 among the parents and hybrids respectively. The highest heterosis was recorded in the cross between NHS10-71 x NHS10-40.

scholarly journals Effect of phosphorus and determination of optimum nitrogen for bread wheat in Kofele District, West Arsi Zone of Oromia, Ethiopia

2020 ◽  
pp. 34-37
Author(s):  
Tilahun Firomsa ◽  
Abdurahman Husien ◽  
Kafyalew Assefa ◽  
Tilahun Abera ◽  
Amante Lemma ◽  
...  
Keyword(s):  
Grain Yield ◽  
Bread Wheat ◽  
Nitrogen Fertilizer ◽  
Block Design ◽  
Rate Of Return ◽  
Soil Test ◽  
Crop Response ◽  
Marginal Rate ◽  
Budget Analysis ◽  
Calibration Study

Optimum nutrients are basic for proper and balanced fertilizer recommendations as paramount importance in order to confirm food security and increase crop productivity in a sustainable way for farmers and other stakeholders. Soil test based crop response phosphorus calibration study for bread wheat at kofole district in 2016 with objectives to determine the optimum nitrogen of bread wheat to nitrogen-fertilizer applications in soils and to give quantitative guidelines and recommendations of nitrogen-fertilizer for bread wheat on Eutric Vertisols. The study was conducted on farmers’ fields across the district. The treatments considered for optimum nitrogen determination were four levels of nitrogen (0, 46, 69 & 92) and phosphorus (0, 23, 46 & 92) fertilizer included in the treatments. The treatments were arranged in a factorial combination of complete block design with two replications. The plot size of 5mx4m with a seed rate of 150kg/ha a variety of Ogolcho which had been recommended for the area was used. The analysis of variance showed that there were significant differences (p<0.05) among treatments application for all locations. The highest grain yield was obtained on the application 69N kg/ha with no application of phosphorus fertilizers on Eutric Vertisols. Minimum grain yield was obtained on the control plots at all sites. Optimum determination with the partial budget analysis made using the annual average bread wheat grains prices showed that 69 kg N ha-1 gave a marginal rate of return of 122.41%, which is above the acceptable minimum rate of return. Therefore, future research should focus on soil test crop response based phosphorus calibration study of on the result optimum nitrogen of the farmland could be a pre request of the technology before to the end user.

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