African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6801

AJAR Articles

Effect of plant density on oil yield of safflower

June 2017

The definition of the ideal plant population is important for good safflower agricultural management in Brazil, as they are gaining importance as oleaginous plant. Two experiments were conducted in an Rhodic Acrudox in 2014 in Cascavel, PR, Brazil, to evaluate the effect of plant density on growth, yield components and grain yield in safflower oil during autumn and winter seasons. The experimental design was a...

Author(s): Marinez Carpiski Sampaio, Reginaldo Ferreira Santos, Doglas Bassegio, Edmar Soares de Vasconselos, Lucas da Silveira, Natasha Barchinski Galant Lenz, Cristiano Fernando Lewandoski and Luciene Kozue Tokuro

Environmental and genetic concerns on genetic gains via selection in Pequi mother tree for seeds emergence

June 2017

Genetic (populations and progenies) and environmental (planting date, germination stimulator, insecticide and fungicide) effects were evaluated on Pequi (Caryocar brasiliense Camb.) seeds emergence. Two Completely Randomized Block Design (E1 and E2, on 2005 and 2009 years, respectively) experiments were set up on field. Seeds for E2 were harvested in mother trees whose seeds showed higher germination rate in E1. The...

Author(s): Samuel Cunha de Oliveira Giordani, Paulo Henrique Rodrigues dos Santos, Miranda Titon and José Sebastião Cunha Fernandes

Phosphorus fractionation and P sorption capacities of Fincha Sugar Estate soils, Western Ethiopia

June 2017

Soil chemical forms of Phosphorus and P sorption capacities of Fincha Sugar Estate soils were studied using samples collected from luvisols, vertisols and fluvisols of the farm. P forms were sequentially extracted following standard P fractionation procedure. In sorption study, 3 g of soil sample was equilibrated with 30 ml of 0.01 M CaCl2 containing various amounts of KH2PO4. Data were fitted into Langmuir and...

Author(s): Fekadu Fanjana, Wassie Haile and Gashaw Mitike

Morpho-agronomic characteristics of cowpea under different environments and planting densities

June 2017

The aim of this study was to evaluate the growth and production components of cowpea ‘BRS Nova Era’ under different planting densities in two growing conditions. The experiment followed an experimental design of randomised blocks, which comprised two environments (Pesqueira and Lajedos cities, Brazil) and five planting densities (6, 8, 10, 12 and 14 plants m-1). In Pesqueira, all production components were...

Author(s): Antônio Félix da Costa, Alexandre Bosco de Oliveira, Leandro Silva do Vale, José Félix de Brito Neto, Ivomberg Dourado Magalhães and Rener Luciano de Souza Ferraz

Topdressed nitrogen fertilization on second-crop corn in soil with improved fertility

June 2017

The aim of this study was to evaluate the performance of sources and application rates of topdressed nitrogen (N) on second-crop corn following soybean in an improved fertility Latossolo in the region of Campos das Vertentes, MG. Brazil. A randomized block experimental design was used in a 4 x 5 +1 factorial arrangement, with four replications. The treatments consisted of the combination of four N sources via forms of...

Author(s): Clério Hickmann, Álvaro Vilela de Resende, Julian Junio de Jesus Lacerda, Silvino Guimarães Moreira and Breno Henrique Araújo

Livelihood issues in herdsmen-farmers’ conflict among farming communities in Kogi State, Nigeria

June 2017

Conflicts between crop farmers and herders are common in nearly every part of Nigeria. It is a formidable challenge to economic development, threat to food security and sustainable livelihood of the agrarian communities. The study assessed the causes and effects of herdsmen-farmers’ conflicts on livelihood of agrarian communities in Kogi State. A total of 135 randomly selected crop farmers was used. Data were...

Author(s): Dimelu Mabel Ukamaka, Salifu Edward Danjuma, Chah Jane Mbolle, Enwelu Innocent Achonam and Igbokwe Edwin Mbadiwe

The efficacy of selected biological control agents against citrus black spot (CBS) pathogen Phyllosticta citricarpa

June 2017

Citrus black spot (CBS) caused by Phyllosticta citricarpa (McAlpine) Van der Aa (asexual state) synonym Guignardia citricarpa Kiely (sexual state) is one of the most devastating diseases of citrus which occurs in various citrus producing areas around the globe. Management is mainly based on monthly applications of copper fungicides and strobilurins under field conditions. In this study, bio-control agents were evaluated...

Author(s): Shirley Avhurengwi Mathelemuse and Mapotso Anna Kena

An analysis of determinants of access to and use of credit by smallholder farmers in Suakoko District, Liberia

June 2017

Agricultural credit has been argued to be very important for sustainable agricultural development and poverty reduction in rural areas. This study seeks to identify and to analyze the determinants of smallholder farmers’ access to and use of credit in Suakoko district, Bong County, Liberia. This research is quantitative using a survey questionnaire distributed to 105 smallholder farmers. Data was analyzed using...

Author(s): Lorbah C. Roberts, David J. Otieno and Rose A. Nyikal

Diversity and infestation indices of fruit flies (Diptera: Tephritidae) in guava (Psidium guajava L.)

June 2017

The fruit flies are considered major pests in the world fruit production due to the direct damage they cause to fruits and the ability to adapt to areas where they are introduced. The objective of this research was to study the fruit fly diversity, the infestation indices in fruits and to characterize the tephritids community in a guava (Psidium guajava L.) cultivar "Paluma", in a commercial orchard located in...

Author(s): Alba Albertina Sarmento Maciel, Raimunda Nonata Santos de Lemos, Almerinda Amélia Rodrigues Araújo, Keneson Klay Gonçalves Machado, Ester Azevedo da Silva, José Ribamar Gusmão Araújo and Mário Luiz Ribeiro Mesquita

Structuring potential of some cover crops and crambe in Haplortox under no-tillage system

June 2017

An experiment was conducted at the Agronomic Institute of Paraná – IAPAR, at the Experimental Station of the municipality of Santa Tereza do Oeste – PR, in Hapludox of clayey soil. Studies with the use of plants cover crops with vigorous root system in different systems of soil management systems are needed, in order to have a diversity of species capable of producing different amounts of crop...

Author(s): Luciene Kazue Tokura, Deonir Secco, Luiz Antônio Zanão Júnior, Jair Antonio Cruz Siqueira, Reginaldo Ferreira Santos, Marcos Felipe Leal Martins, Alessandra Mayumi Tokura Alovisi, Luiz Carlos de Oliveira, Ronaldo Hissayuki Hojo, Natália Pereira, Maurício Antônio Pilatti, Macarius Cesar Di Lauro Moreira, Bruna de Villa and Marta Juliana Schmatz

Agro-morphological diversity in yam genotypes from Recôncavo of Bahia, Brazil

June 2017

The aim of this study was to evaluate the diversity of yam genotypes concerning their agro-morphological traits based on the Ward-modified location model (Ward-MLM) procedure. 209 genotypes from the commercial production area of the Recôncavo region in the state of Bahia, Brazil were used. Three agronomic traits (length, width and weight of the rhizophore) and two morphological traits (rhizophore shape and skin...

Author(s): Ricardo Franco Cunha Moreira, Sandra Domingos João Afonso, Carlos Alberto da Silva Ledo, Simone Alves Silva, Antonio Leandro da Silva Conceição, Elaine Costa Cerqueira-Pereira and Cássia da Silva Linge

Linkages of research agencies in technology transfer for sustainable agricultural development in south east Nigeria

June 2017

The study assessed the linkages that exit among research agencies in transfer of technology for continuous agricultural production in South East Nigeria. Four research questions and hypotheses guided the study. The study adopted ex-post-facto research design. The population for the study was 2,276 comprised of 112 agricultural extension agents, 393 officers of research institutes and 1,771 registered contact farmers....

Author(s): Ifeanyieze, F. O, Nwarieji, F. E. and Aneke, C. U.

Effects of different soil amendments on the performance of okra (Abelmoschus esculentus L.) in a bimodal rainforest zone

June 2017

Okra contributes an important part of the diet to many people in the tropics, more especially in Cameroon. But its production is seriously affected by poor soil fertility. In other to mitigate this problem, a field experiment was conducted from April to august 2016 at Institute of Agricultural Research for Development (IRAD) Nkolbisson-Yaoundé with the main objective to evaluate the effects of different soil...

Author(s): KWAYEP Lambert Natan, SUH Christopher, KONJE Christina, MANGA Ambroise, KENFO Thomas, LOMBEKO Victorine and DJOMO SIME Hervé

In vitro efficacy of certain botanicals against bacterial soft rot of tomato (Solanum lycopersicum L.)

June 2017

Tomato (Solanum lycopersicum L.) is a species of the family Solanaceae. It is herbaceous, annual to perennial, prostrate and sexually propagated plant with bisexual flower. Tomatoes are attacked by many kinds of plant pathogens such as fungi, bacteria, nematodes, viruses and viroid. Among bacterial diseases, bacterial soft rot devastates many important crops of the family Solanaceae particularly potato, eggplant and...

Author(s): Adamu S. H., Lal A. A. and Simon S.

Genetic diversity among papaya accessions

June 2017

Genetic diversity studies provide fundamental information for characterization, conservation and utilization of available genetic resources in plant genetic improvement programs. To evaluate the genetic divergence among papaya accessions, 17 morphoagronomic variables from 59 accessions of the active germplasm bank were evaluated in an experiment at Santa Teresinha Farm, belonging to Caliman Agrícola S/A, in...

Author(s): Clemilton Alves da Silva, Adriel Lima Nascimento, Jeferson Pereira Ferreira, Omar Schmildt, Renan Garcia Malikouski, Rodrigo Sobreira Alexandre, Geraldo Antônio Ferreguetti and Edilson Romais Schmildt

Effect of irrigation intervals on growth, flowering and fruits quality of okra Abelmoschus esculentus (L.) Monech

June 2017

This study was done to investigate the influence of irrigation intervals and cultivars on growth, flowering and fruits qualities of okra (Abelmoschus esculentus L.). The experiment was conducted using Randomize Complete Block Design (RCBD) in Split-Plot Design at the vegetable field, Department of Horticulture and Gardening Landscape, College of Agriculture, University of Baghdad, Iraq. Two cultivars of okra were used:...

Author(s): R. M. Al-Ubaydi, E. F. Al-Shakry, M. A. Al-Samara and S. M. Al-Mohmadawy

Determinants of agroforestry adoption as an adaptation means to drought among smallholder farmers in Nakasongola District, Central Uganda

June 2017

Agroforestry adoption as a drought adaptation option has an omnibus of opportunities for smallholder farmers in semi-arid regions. This study assessed the severity and frequency of drought and the determinants of agroforestry adoption in Nakasongola District. The episodes were examined using the Standardised Precipitation Index (SPI) set at 3, 6 and 12 months timescales. A cross-sectional survey using semi-structured...

Author(s): David Mfitumukiza, Bernard Barasa and Aringaniza Ingrid

Effect of supplementing pounded Prosopis juliflora pods on hematological profiles of Afar goats fed on Panicum antidotale hay

June 2017

A study was conducted on thirty two 15.5±1.4 kg (mean ± SD) male Afar goats so as to evaluate effects of increasing dietary levels of pounded Prosopis juliflora (P. juliflora) pod on their performance. Hematological values, individual feed intake and body weight gain were determined during a 90-day experimental period. Four dietary treatments were applied using complete randomized design (CRD). The...

Author(s): Mahmoud Hassen, Gebremeskel Mamu and Kedir Hamza

Early growth and survival rates of crossbred lambs (Dorper x indigenous) under semi-intensive management at Areka, Southern Ethiopia: Effects of non-genetic factors

June 2017

Stagnant early growth and poor lamb survival are the major constraints of sheep production in Ethiopia. The aim of this study was to evaluate early growth and survival rate of crossbred lambs (Dorper × indigenous, Adilo) under semi-intensive conditions. Body weight (BW, kilograms) at 0-180 days, average daily gain (ADG, g/day), pre- (0-90), post (90-180) and overall (0-180 days), and pre-weaning survival rate...

Author(s): Deribe Gemiyo, Girma Abebe, Gebeyehu Ganga, Asrat Tera and Belete S. Gemeda

Agronomic characteristics and oil content of different genotypes of canola (Brassica napus L. var. oleifera)

June 2017

The aim of this study was to evaluate the agronomic performance and oil content of 13 canola genotypes in Western Paraná, Brazil. The experiment was carried out, during the year of 2015, in the municipality of Marechal Cândido Rôndon in the west of the State of Paraná. A Randomized Complete Block Design (RCBD) was utilized with four replications. The genotypes of canola evaluated were Hyola...

Author(s): Milciades Melgarejo Arrúa, José Barbosa Duarte Jr., Gilberto Omar Tomm, Augustinho Borsoi, Eder Mezzalira, Andres Luiz Piva, Anderson Santin and Claudio Y. Tsutsumi

Mass selection for enhancement fruit yield in Edkawy cultivar of tomato under different irrigation intervals in southern of Egypt

June 2017

Field experiments were carried out during the period from 2013 to 2017 in the winter season at the experimental farm, Faculty of Agriculture, South Valley University, Qena, Egypt. Improvement yield and its attributes in Edkawy local cultivar via mass selection were done for three cycles. The unselected base population (C0) and selected populations (C1, C2, and C3) evaluated under two different water availability,...

Author(s): Abdel-Haleem A. H. El-Shaieny

Evaluation of dietary fat sources on growth performance, excreta microbiology and noxious gas emissions in Ross broilers

June 2017

An experiment was conducted to evaluate fat sources on growth performance, excreta microbiology and noxious gas emissions in broilers. Experimental birds were reared for 5 weeks and divided into two periods: Starter (0 to 3 weeks) and finisher (4 to 5 weeks). A total of 150 one day old Ross 308 broiler chicks were randomly allocated into five treatments with five replications (six birds per replicate) following a...

Author(s): A. B. M. Rubayet Bostami, H. S. Mun, G. I. Kim, S. Seilsuth and C. J. Yang

Effects of cultivation duration and mode on the microbial diversity of the Amorphophallus konjac rhizosphere

June 2017

Amorphophallus konjac cannot be cultivated on the same field consecutively for extended periods, but can be cultivated on the same grove. The underlying mechanism for this is unknown and may involve the rhizosphere microbial community. Therefore, the different duration and mode for konjac were researched. Polymerase chain reaction denaturing gradient gel electrophoresis (PCR-DGGE) showed that microbial communities...

Author(s): Jinping Wu, Zhenbiao Jiao, Fengling Guo, Jie Zhou, Zhengming Qiu and Zili Ding

Improved production systems for common bean on Ferralsol soil in south-central Uganda

June 2017

Common bean (Phaseolus vulgaris L.) is the most important source of dietary protein in Uganda but current grain yields are low. Production is particularly low on the degraded Ferralsol soils that dominate the landscape because these soils are generally weathered, acidic and infertile. A study was done on a Ferralsol soil in Masaka District, Uganda to compare productivity and economic return to labor and management...

Author(s): Lance H. Goettsch, Andrew W. Lenssen, Russell S. Yost, Ebby S. Luvaga, Onesmus Semalulu, Moses Tenywa, Richard Miiro and Robert E. Mazur

Analyses of constraints related to milk production in Liptako Gourma in Niger

June 2017

Livestock in Niger has great potentials. If well managed, this sector can significantly improve food security and boost poverty alleviation in the population. In order to encourage the development of local milk production in Liptako Gourma, the present study was undertaken to identify constraints related to milk production in the area. A questionnaire based survey was conducted to collect data from 360 dairy farmers....

Author(s): Gagara Mariama, Sessou Philippe, Ahounou Serge, Azokpota Paulin, Youssao Issaka, Farougou Souaïbou and Gouro Abdoulaye Soumana

Influence of Bradyrhizobia inoculation on growth, nodulation and yield performance of cowpea varieties

June 2017

Cowpea (Vigna unguiculata L. Walp) has a major role in daily diet of the rural community and poor urban population, serving as a source of energy, protein and minerals, in developing countries. Its straw used for animal feed, and the crop also improves soil fertility by fixing the atmospheric nitrogen. However, its productivity is constrained by lack of improved varieties and poor agronomic practices. A field experiment...

Author(s): Tarekegn Yoseph, Bekele Baraso and Tewodros Ayalew

Popularization of dorper sheep breed for enhancing production and productivity of local sheep: In the case Enda-Mekoni Woreda Southern Tigray, Ethiopia

June 2017

Ethiopia has endowed sheep breed with poor productivity in terms of meat yield. Therefore demonstration of Dorper breed sheep was conducted at Enda-Mekoni Woreda with the objective of improving production and productivity of local sheep. Two pure male Dorper sheep were introduced to Enda-Mehoni Woreda for community based breeding strategies. Data such as live Body weight and farmer perception were collected. Data was...

Author(s): Temesgen Tesfay, Hagos Kidane, Tesfay Atsebha, Teshale Teklu, Solomon Wayu, Adehanome Baraki, Yekalo Teklay, Zebrhe Teklay, Haileselassie Amare and Zelealem Tesfay

Response of African Nightshade (Solanum sp.) to cassava peel-based manure in the humid forest zone of Cameroon

June 2017

Studies were conducted at Ekona in the humid forest agro-ecological zone of Cameroon to evaluate the effects of cassava peel-based manures on the growth and yield of African Nightshade. The first experiment consisted of evaluating the composted cassava peel and poultry manure applied at the rates of 0, 5, 10 and 20 t/ha and 150 kg/ha NPK (20:10:10) fertilizer. In the second experiment, a dried and grind mixture of...

Author(s): Nkengafac Jetro Njukeng, Francis Ajebesone Ngome, Ives Bruno Mousseni Efombagn and Carine Nono Temegne

Isolation, identification and molecular characterization of Rhizobium species from Sesbania bispinosa cultivated in Bangladesh

June 2017

The investigation was carried out to study the characteristics of rhizobial strains isolated from the leguminous plant, Sesbania bispinosa growing in different regions of Bangladesh. Forty-four isolates were studied for biochemical and molecular characteristics. Isolates were able to utilize different carbohydrates. All isolates showed complete resistance to cloxacillin and penicillin G that results in increased...

Author(s): Nusrat Nahar, Anowara Begum and Humaira Akhter

Perceptions of risk and risk management strategies in family agroindustries

June 2017

The importance of risk perception and risk management has been addressed by studies of agriculture and livestock activities; however, there have been few studies in other contexts, such as family agroindustries. This study provides information on risk perception and risk management in family agroindustries in the state of Rio Grande do Sul, Brazil. The analysis involves 72 family agroindustries in 43 counties, and the...

Author(s): Cristian Rogério Foguesatto and João Armando Dessimon Machado

Improving grain legume yields using local Evate rock phosphate in Gùrué District, Mozambique

June 2017

Acid, infertile reddish-brown soils characterize large amounts of central Mozambique. Few of these soils are in food production representing a missed opportunity for agricultural productivity and a missed alternative to improve the food security of the country. Low levels of soil nutrients such as calcium, phosphorus, and potassium limit crop growth. Local agricultural amendments for acid, infertile soils such as...

Author(s): António Rocha, Ricardo Maria, Unasse S. Waite, Uatema A. Cassimo, Kim Falinski and Russell Yost

Technical efficiency of smallholder barley farmers: The case of Welmera district, Central Oromia, Ethiopia

June 2017

Crop production and productivity are not only inevitably affected by level of adoption of improved technologies and external factors but also the technical efficiencies of producers. The main objectives of this study are to estimate technical efficiency of sample barley farmers, assess determinant factors and compute yield loss due to inefficiency. Plot level data from 180 barley growers were collected through three...

Author(s): Wudineh Getahun and Endrias Geta

Quality of planting systems in varieties of sugarcane

June 2017

This study aimed to assess the operational quality of mechanized planting and semi-mechanized sugarcane for RB835054 and SP813250 varieties. The sugarcane has significant importance in Brazil, as it is a strong presence of culture in the economic field, with sugar and ethanol production. The mechanization of agricultural operations has been implemented in order to increase operational performance and reduce cost, thus...

Author(s): André Ferreira Damasceno, Carlos Eduardo Angeli Furlani, Cristiano Zerbato, Rafael Henrique de Freitas Noronha and Remo Marini Zoia

Further studies on Bovine Ixodide Ticks in and around Bedelle, Southwest Ethiopia

June 2017

Considering the economic impact of various ticks species on livestock, the present study was conducted for epidemiological characterization of common ticks infesting Ethiopian cattle between November 2013 and March 2014 period at various locations of Bedelle region. A total of 384 cattle were examined on random basis throughout the five months, out of which 231 cattle were found to be infested with ticks (60.12%). On...

Author(s): Hunde Aboma, Assefa Kebede and Mukarim Abdurahaman

Effects of genotype on yield and yield component of soybean (Glycine max (L) Merrill)

June 2017

In 2013, the multi-location trial was implemented to evaluate the new soybean genotypes for their agronomic performance against the local check. The experiment was conducted in three locations namely Ilonga, Kibaha, and Mlingano in each location a triplicated trial involving six genotypes of soybeans were implemented. The effects of genotype, location and genotype x environment interaction under combined analysis on...

Author(s): Liberatus Dominick Lyimo, Musa Rashid Tamba, and Richard Raphael Madege

Agronomic efficiency of inoculant based on Azospirillum brasilense associated with nitrogen fertilization at maize

June 2017

The objective was to evaluate the agronomic efficiency in the field of the inoculant Fluid and Turfoso containing the bacterium Azospirillum brasiliense, strains AbV5 and AbV6 applied by treatment of seeds in the corn crop associated with nitrogen fertilization in different localities. Four experiments were carried out in different sites involving two in Paraná and one each from Mato Grosso do sul and Santa...

Author(s): Vandeir Francisco Guimarães, Marcelo Andreotti and Jeferson Klein

Genetic variability, heritability and genetic advance for quantitative traits in coffee (Coffea arabica L.) accessions in Ethiopia

May 2017

Estimation of genetic parameters is pertinent as variability within population determines the extent of improvement achieved through crop improvement methods. In view of this, forty-nine coffee (Coffea arabica L.) germplasm accessions, which were collected from Gomma Woreda, were evaluated at Agaro with the objectives of assessing genetic variability, heritability and genetic advance for morphological traits. The...

Author(s): Getachew Weldemichael, Sentayehu Alamerew and Taye Kufa

Understanding the need for transfer of biologically-based crop protection technology for soil pest control in vegetable production in Rwanda

May 2017

Despite growth in Rwanda’s agricultural production ability, with food crops representing 33% of the National GDP and 80% of the population reliant on agriculture, food supply remains fragile. A factor which has significant impact on productivity is soil pests, whose effects filter through the whole value chain. Poor yields result in demand that exceeds supply, leading to higher food prices and reduced...

Author(s): Musebe R., Dusenge L., Agwanda C., Kajuga J., Waweru B., Karanja D., Hongmei L. and Day R.

Amelioration of a degraded ultisol with hardwood biochar: Effects on soil physico-chemical properties and yield of cucumber (Cucumis sativus L)

May 2017

A study was conducted in two consecutive cropping seasons to assess the effect of biochar on soil properties and yield of cucumber (Cucumis sativus L) in an intensive cucumber–maize rotation based system of Abakaliki, Southeastern Nigeria. Five rates of hardwood biochar (0, 2.5, 3.75, 5 and 6.25 t ha-1) were used for the study. The study was laid out as a randomized complete block design (RCBD) with five...

Author(s): C. N. Mbah, C. Njoku, C. C. Okolo, E. E. Attoe and U.C. Osakwe

Climate conditions in the eastern amazon: Rainfall variability in Belem and indicative of soil water deficit

May 2017

The objective of this study was to evaluate the regimes of temperature and rainfall in Belém, PA, Brazil, with emphasis on the start of the dry season in order to provide planning support for agricultural activities during years of climatic anomolies in the region. An initial analysis was done of the metropolitan region of Belém comparing it to the typology of Amazonian climates using rainfall data from...

Author(s): Lucieta Guerreiro Martorano, Maria Isabel Vitorino, Bruna Paula Pantoja Caxias da Silva, José Reinaldo da Silva Cabral de Moraes, Leila Sheila Lisboa, Eleneide Doff Sotta and Klaus Reichardt

Sunflower seed yield under trickle irrigation using treated wastewater

May 2017

Filed experiment was carried out in land near Ramtha Wastewater Treatment Plant during growing seasons of 2010 and 2011 to determine the effects of using treated wastewater on plant growth, seed yield and yield components of sunflower (Helianthus annuus L.) under trickle irrigation. Randomized complete block design (RCBD) for three irrigation treatments namely; I1= Full irrigation (Actual crop coefficient), I2= 80% of...

Author(s): Hamzeh Mohmmad Rawashdeh

Insect pests infesting black pepper (Piper nigrum L.) in southwestern part of Ethiopia

May 2017

Survey was carried out to study the distribution, infestation and damaging level of insect pests of black pepper during 2013/2014 cropping season in Southwestern Ethiopia. Insect pests were observed and identified at their sites in the surveyed areas. In addition, samples of insect pests and infected plant parts were collected and insect images were taken. The samples were diagnosed in Tepi National Spice Research...

Author(s): Teshale Daba, Habetewold Kifelew, Girma Hailemichael and Wakjira Getachew

Knowledge and perceptions of plant viral diseases by different stakeholders in Zimbabwe’s agricultural sector: Implications for disease management

May 2017

Plant viruses are major constraints to crop production worldwide, causing US$60 billion losses annually. This study assessed various agricultural sector stakeholders’ knowledge and perceptions of plant viruses in Zimbabwe. Data was collected from six provinces using surveys and participatory rural appraisal methodologies between December 2013 and October 2014. Maize streak virus, Tobacco mosaic virus, Cucumber...

Author(s): Charles Karavina, Vincent Tinashe Munyati and Augustine Gubba

Forage productivity system evaluation through station screening and intercropping of lablab forage legume with maize under Irrigated lands of smallholder farmers

May 2017

On station, farm studies were conducted in the eastern zone of Tigray to improve feed resource through integrating forage and cereal crops, to identify suitable and compatible lablab accessions for maize lablab intercropping under smallholder farmers, to demonstrate maize/lablab intercropping on farm, and to see farmer’s perception towards this technology. In the first study, eight lablab accessions were screened...

Author(s): Weldeyesus Gebreyowhens

Nutritional composition of vegetables grown in organic and conventional cultivation systems in Uberlândia, MG

May 2017

There is a growing concern about the presence of pesticides in food and the health problem they may cause. Awareness of this issue, consumers opt for organic food consumption. Organic agriculture is a farming system ecologically sustainable, economically viable and socially just, capable of integrating man and environment. This study evaluated the nutritional composition of some crops grown in an organic (Org) and...

Author(s): Luciana Nunes Gontijo, Cassiano Oliveira da Silva, Lorena Gomes Stort, Renata Maria Teixeira Duarte, Cristiane Betanho and Erika Maria Marcondes Tassi

The growth and nutrition of pineapple (Ananas comosus L.) plantlets under different water retention regimes and manure

May 2017

Despite the many advantages of pineapple plants offered by micropropagation, there is difficulty in rooting and slowness in the growth of seedlings, requiring a long period of acclimatization in the greenhouses. The aim of this study was to evaluate organic sources and water retention polymers used for pineapple cultivar seedlings during the acclimatization phase. The experimental design was randomized blocks in a 2...

Author(s): Vander Mendonça, Luciana Freitas de Medeiros Mendonça, Eduardo Castro Pereira, Grazianny Andrade Leite, José Maria da Costa and Francisco Mickael Câmara de Medeiros

Combining ability analysis of quality protein maize (QPM) inbred lines for grain yield, agronomic traits and reaction to grey leaf spot in mid-altitude areas of Ethiopia

May 2017

A study was carried out to study the combining ability effects of diallel cross hybrids for grain yield, agronomic traits and reaction to grey leaf spot (GLS). Forty five experimental diallel cross hybrids made from ten quality protein maize (QPM) inbred lines with varying level of resistance to GLS were evaluated along with three checks at Bako and Jima Research Centers during 2014/2015 cropping season. Analysis of...

Author(s): Bitew Tilahun, Midekisa Dida, Temesgen Deresa, Belay Garoma, Girma Demissie, Dejene Kebede, Dagne Wegary and Adefiris Teklewold

Evaluation of cowpea root system and yield traits in humid tropical agro-ecology

May 2017

Roots are essential to plants and can be the focus for yield improvement in the environment the plant grows. The objectives of this study were to evaluate some yield components and root traits in cowpea (Vigna unguiculata (L) Walp) and establish the linear association between the yield and root traits to explore improvement potentials of the crop in humid ecosystem. Ten cowpea accessions were tested in Calabar, Nigeria...

Author(s): Macauley A. Ittah and Chioma L. Arua

Intercropping of sweet flag (Acorus calamus L.) with early and late maturing cultivars of rice (Oryza sativa L.)

May 2017

 Field experiments were conducted to explore possibility of introducing Acorus calamus (Sweet flag) under rice ecosystem either as an Intercrop or main crop for optimizing maximum return. In the first experiment, Sweet flag was intercropped with two rice cultivars early IR-64 and late MTU-7029 “Swarna” in additive series where sweet flag was introduced between two normal rows of rice and in replacement...

Author(s): Raj Kumar Singh Tiwari and K. K. Chandra

Leaf detector box: Artificial vision system for leaf area identification

May 2017

The detection of leaf area in plants is a very important parameter to evaluate growth rates. Nowadays, this analysis is performed manually through a process of counting, cutting and weighing leaf that involves long periods of time, providing subjective results and with low repeatability. The purpose of this research was to develop a computational tool (leaf detector box) to detect leaf area through image processing...

Author(s): Cristian Manuel Agudelo Restrepo, Edgar Eduardo Roa-Guerrero, and Humberto Numpaque López

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