African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6712

AJAR Articles

Interaction between potassium (K) and calcium (Ca) on the severity of Yellow Sigatoka in banana plants

April 2017

The main control measure of Yellow Sigatoka (Pseudocercospora musae) in banana plants (Musa spp.) has been the planting of resistant varieties, and fungicide application. However, the use of adequately nourished plants is also emphasized as a complementary control method. This study evaluated the influence of interaction between potassium (K) and calcium (Ca) in nutrient solution on the severity of Yellow Sigatoka in...

Author(s): Aurivan Soares de Freitas, Edson Ampélio Pozza, Adélia Aziz A. Pozza, Maria Gilmara de O. Soares, Humberson Rocha Silva, Cristian D. Plaza Pérez

Crop yield potential as telltale indice of soil weathering extent and fertility status: The case of East African Highland Bananas

April 2017

In the African Great Lakes Region, bananas are grown on a diversity of soils with different weathering stages. However studies using the crop yield potential as a mean of soil weathering degree assessment are still scanty. Bananas were grown on five soils types to test if such a relationship could be ascertained. Mineralogical composition, elemental total analysis, routine chemical analysis, oxalates and...

Author(s): Bizimana Syldie,

LED in production systems of laying hens: An alternative to increase sustainability

April 2017

The Brazilian poultry production currently has a substantial impact on the national and international economy. Brazil ranks sixth in the world rankings of the largest egg producers. However, the activity still has barriers related to management and facilities, such as high waste of electrical energy due to the low energy efficiency of the lighting systems. The artificial lighting programs represent an important...

Author(s): Samara Paula Verza, Erika Codensey Toledo Mello Peixoto, Claudia Yurika Tamehiro, Marcio Massashiko Hasegawa, Petrônio Pinheiro Porto and Marcos Augusto Alves da Silva

Biological nitrogen fixation and yield of pigeonpea and groundnut: Quantifying response on smallholder farms in northern Malawi

April 2017

The global nitrogen (N) cycle is markedly, and increasingly, influenced by anthropogenic inputs. A large unknown remains the quantity of biological N fixation (BNF) inputs derived from agriculture. This leads to major uncertainties in modeling reactive N interactions with climate change, and understanding N biogeochemical processes. Understanding N dynamics is central to enhancing productivity in cropping systems. ...

Author(s): Wezi G. Mhango, Sieglinde Snapp and George Y. Kanyama-Phiri

Effect of plant population and nitrogen rates on growth and yield of okra [Abelmoscus esculentus (L). Moench] in Gambella region, Western Ethiopia

April 2017

Okra is one of the most important crops next to maize and sorghum production in Gambella Regional States. Okra production and yield maximization has not been attained due to lack of appropriate production practices such as optimum plant spacing and fertilizer use. Therefore, the research was conducted to assess the effect of plant population, and nitrogen rate on growth and yield components of Okra (Abelmoscus...

Author(s): Amanga Okello Baw, Fikreyohannes Gedamu and Nigussie Dechassa

Evaluation of root-knot nematode resistance in sweetpotato

April 2017

Five healthy, vigorous cultivars of sweet potato [Ipomoea batatas (L.) Lam] were cultivated under root-knot nematode Meloidogyne incognita challenge to distinguish levels of resistance to infection. Roots and soil samples were collected 84 days’ post-infection and evaluated for specific host responses to nematode infection by visual screening analysis and quantitative assessments of symptoms of infection....

Author(s): Gregory C. Bernard, Marceline Egnin, Conrad Bonsi, Desmond Mortley, William H. Witola, Wendell McElhenney Steven Samuels Caroline Land and Kathy Lawrence

Potential hydrogen ion of Quartzarenic Neosol with joint application of lime and gypsum

April 2017

The objective of the study is to investigate the interaction of lime and gypsum during incubation of soil samples in response to pH and also check the possibility of using more than one treatment for a single model by model identity method. The analysis of the potential hydrogen ion (pH) was performed in the Laboratory of Agricultural Chemistry, Federal Institute Goiano, Campus Rio Verde - GO, Brazil. The soil used is...

Author(s): Vitor Marques Vidal, Carlos Ribeiro Rodrigues, Suzete Fernandes Lima, Andréia Mendes da Costa, Tatiana Michlovská Rodrigues, Fernando Nobre Cunha, Marconi Batista Teixeira, Cicero Teixeira Silva Costa, Wilker Alves Morais, Eduardo Sousa Cunha, Giovani Santos Moraes, Gustavo da Silva Vieira and Igor Olacir Fernandes Silva

Biological nitrogen fixation by pigeon pea and cowpea in the “doubled-up” and other cropping systems on the Luvisols of Central Malawi

April 2017

Legumes form a very important component in Malawi’s cropping systems because of their roles in food security, income generation and soil fertility improvement through biological nitrogen fixation (BNF). They are commonly grown in various cropping systems including sole cropping, cereal-legume intercrops and legume-legume intercrops (also commonly referred to as “doubled-up”). However, information on...

Author(s): Keston O. W. Njira, Ernest Semu, Jerome P. Mrema and Patson. C. Nalivata

Amelioration of cacao seedlings with bio – degraded coffee husk for enhanced nursery performance

April 2017

Cacao is a major economic crop in West Africa and some other parts of the world and is grown through nursery prior to field establishment. The husk of Coffea species forms over 40% of the matured seeds and is regarded as a waste despite its nutrient composition status. Husks of Coffea arabica and Coffea canephora were degraded using  Trichoderma harzianum, Streptomyces spp. and the combination of these microbes for...

Author(s): Nduka, B. A. and Adeniyi, D. O.

Using morphometric traits for live body weight estimation and multivariate analysis in Central Highland and Woyto-Guji Goat Breeds, Ethiopia

April 2017

The study was conducted to differentiate the Woyto-Guji and Central Highland goat breeds of Ethiopia and derive the most accurate linear regression equation for live body weight prediction. Morphological measurements were taken on randomly selected 531 adult female goats (263 from Woyto-Guji and 268 from Central Highland). Positive and highly significant (P<0.001) correlations were observed between body weight and...

Author(s): Netsanet Zergaw, Tadelle Dessie and Kefelegn Kebede

Irrigation technology and crop choices in Ethiopia: Spate vis-a-vis rainwater-harvesting irrigation technologies

April 2017

Moisture-stress weakens the use of modern inputs such as fertilizer, which could undermine yields. In a growing population, low yields cause food shortage. Investing in irrigation mitigates moisture-stress but expensive for smallholder farmers. Spate irrigation, a sudden flood run-off diverting, is cheaper to invest in than other irrigation technologies such as ponds and shallow-wells. This study investigated factors...

Author(s): Mekonnen B. Wakeyo and Naoya Fujimoto

Impact of land use and management practice on soil physical and chemical quality indicators of Vertisols at Pawe, Northwestern Ethiopia

April 2017

Soil quality is a function of inherent and dynamic properties of soil which determines the sustainability of crop and animal production. Based on this fact, the study was aimed to investigate the effects of land use systems and management practices on soil physical and chemical quality indicators of Vertisol at Pawe district, Northwestern Ethiopia. The result revealed that most of the soil physical and chemical...

Author(s): Mohammed Yimam Mohammed

Impacts of deforestation on the livelihood of smallholder farmers in Arba Minch Zuria Woreda, Southern Ethiopia

April 2017

The ever increasing demand of farmland, fuel wood and charcoal production coupled with population growth has accelerated the rate of forest reduction in Ethiopia. This has resulted in soil erosion and land degradation. This study was conducted at Arba Minch Zuria Woreda Gamo Gofa Zone, Southern Nations and Nationalities Peoples’ Region (SNNPR), with the aim of assessing impacts of deforestation on the livelihood...

Author(s): Habtamu Worku Enbakom, Debela Hunde Feyssa and Serekebirhan Takele

Utilization of wheat bran and dried Acacia saligna (Labill) H.L.Wendl leaves by highland rams

April 2017

This study was conducted to evaluate body weight gain, feed intake and digestibility of highland sheep supplemented with wheat bran and dried Acacia saligna leaf five treatments, namely grass hay as a control (T1), 100 g per day A. saligna, (T2), 200 g per day A. saligna  (T3), 300 g per day A. saligna (T4) and 400 g per day A. saligna (T5) with a fixed amount (200 g per day) of wheat bran was provided to the...

Author(s): Gebreslassie Gebru and Yayneshet Tesfay

Physiological and behavioral responses of dairy heifers in an integrated-crop-livestock-forestry system

April 2017

The integrated crop-livestock-forestry system has been an option in tropics to mitigate the effects of heat stress on pasture-based system for dairy cows. We evaluate the effects of shade arrangements in integrated crop-livestock-forestry systems on physiological and behavioral responses of crossbred dairy heifers. Twenty-four crossbred European-Zebu heifers with 330.0±36.7 kg of body weight were assigned in...

Author(s): Luiz Antônio Santana Souza, Soraia Vanessa Matarazzo, Roberta Aparecida Carnevalli, and Luciandra Macedo de Toledo

The effect of plant density on growth and yield of ‘NsukkaYellow’ aromatic pepper (Capsicum annuum L.)

April 2017

Nsukka yellow pepper is an important aromatic pepper that is highly valued for heat, spice and flavour in Eastern Nigeria. The study was initiated to investigate the effects of different plant population densities on the morphological and fruiting characteristics of Nsukka yellow pepper cultivar. Eight treatment combinations giving rise to different population densities were used. The data on the number of leaves,...

Author(s): Ngozi E. Abu and Chidera V. Odo

Socioeconomic profile and farm management practices of smallholder cocoa farmers in three cocoa producing districts in Southwestern Ghana

April 2017

There is paucity of knowledge about the current socioeconomic status and farm management practices of cocoa farmers in Ghana. And not up-to-date an accurate knowledge of socioeconomic profile and farm management practices of cocoa farmers is necessary to ensure sustainable cocoa production. In this study, we assessed socioeconomic profile and farm management practices of smallholder cocoa farmers in three cocoa...

Author(s): Daniel A.Tetteh and Alex Asase

Relevance of endo-β-mannanase enzyme in coffee seed deterioration process

April 2017

The endo-β-mannanase acts on the hemicellulose fraction of the endosperm cell walls, mainly mannans and galactomannans. This process weakens cell walls and allows radicle protrusion during seed germination, but may also occur during the deterioration process. Thus, the aim of this research was to determine the activity of endo-β-mannanase enzyme in dry coffee seeds and in soaked seeds, evaluating its...

Author(s): Marcella Nunes de Freitas, Sttela Dellyzete Veiga Franco da Rosa, Aline da Consolação Sampaio Clemente and Cristiane Carvalho Pereira

Effect of different doses of NPK fertilizer on the growth and yield of rice in Ndop, North West of Cameroon

April 2017

This study was conducted in 2015 in Ndop, Ngoketujia Division in the North-West region of Cameroon. Four varieties of rice were used: NERICA3, NERICA7 (upland rice), NERICA36 and NERICA42 (lowland rice). Two types of fertilizers N-P-K (23-10-05 and N-P-K (20-10-10) were tested at different doses (0 kg-contol; 180 kg, 200 kg, 220 kg-treatments). The trial was set up in a Randomized Complete Block Design (RCBD) in a...

Author(s): DJOMO SIME Hervé, MBONG Grace Annih, MALLA Dorothy Kenyi and SUH Christopher

Elucidation of the betalainic chromoalkaloid profile of Pilosocereus catingicola (Gürke) Byles & Rowley subsp. salvadorensis (Werderm.) Zappi (Cactaceae) from Paraíba, Brazil

April 2017

The cacti are important plant genetic resources of the Brazilian semiarid region, with potential for the extraction of bioactive compounds such as flavonoids and alkaloids. The objective of this research was to characterize and quantify the chemical constituents of Pilosocereus catingicola (Gürke) Byles & Rowley subsp. salvadorensis (Werderm.) Zappi occurring in caatinga in the Westland of Paraíba,...

Author(s): Alex da Silva Barbosa, Jason Q. D. Goodger, Ian E. Woodrow, Alberício Pereira de Andrade, Riselane de Lucena Alcântara Bruno and Italo de Souza Aquino

Impact of crop rotation sequences on potato in fields inoculated with bacterial wilt caused by Ralstonia solanacearum

April 2017

The potato industry in Kenya is threatened by bacterial wilt because most production areas are infested with the wilt-causing Ralstonia solanacearum and over 50% yield losses have been reported. Continuous cultivation causes soil physical and biological constrains that greatly affect the crop performance and increase proliferation of the bacterium. Rotation with non-host or suppressant plant species could contribute to...

Author(s): Mwaniki P. K., Wagara I. N., Birech R., Kinyua Z. M., Schulte-Geldermann E. and Freyer B.

Allometric relationships and carbon content for biomass-carbon estimation of East African Highland Bananas (Musa spp. AAA-EAHB) cv. Kibuzi, Nakitembe, Enyeru and Nakinyika

April 2017

Globally, interests to increase carbon stocks have gained momentum in both woody and non-woody ecosystems. Despite efforts made to generate appropriate methods to estimate these stocks, most equations developed do not cater for intraspecific variabilities across e.g. species, regions or growth stages; especially in the case of bananas. Therefore, there is need to develop more robust equations to improve on the precision...

Author(s): Daphine Kamusingize, Jackson Mwanjalolo Majaliwa, Everline Komutunga, Susan Tumwebaze, Kephas Nowakunda, Priver Namanya and Jerome Kubiriba

Evaluation of aggregate distribution and selected soil physical properties under maize–jack bean intercropping and gypsum rates

April 2017

Adequate soil management can create favourable conditions to increase aggregation and porosity of the soil, resulting in better aeration of the soil and water infiltration. Consortia of maize and other species have been used in no-till systems to increase dry matter production, and consequently, the soil cover. This study aimed to evaluate the effects of consortia of maize and jack bean (Canavalia ensiformis) on...

Author(s): Edleusa Pereira Seidel, William dos Reis, Marcos Cesar Mottin, Emerson Fey, Ana Paula Reck Schneider and Monica Carolina Sustakowski

Toxicity of neonicotinoids used in melon culture towards Apis mellifera L.

April 2017

The cultivation of melon (Cucumis melo L.) is of great importance to the Brazilian economy, especially the semiarid regions of the Northeast region. Damage caused by pests have hindered the production, requiring that control measures be adopted, among them applications of chemical insecticides, including neonicotinoids. Studies have shown collateral damage to beneficial insects such as bees, important pollinators for...

Author(s): Whalamys Lourenço de Araújo, Maurício Sekiguchi de Godoy, Patrício Borges Maracajá, Wesley Adson Costa Coelho, Bárbara Karine de Albuquerque Silva, Adrian José Molina Rugama, Elton Lucio de Araújo and Jacinto de Luna Batista

Maturity indices for tomato (Solanum lycopersicum L.), cv. Ghalia 281 in Central Uganda

April 2017

Application of maturity indices and optimal harvest time improves handling and marketing operations and minimizes pre and postharvest losses for tomato products. Growth patterns of tomato (Solanum lycopersicum L.), cv. Ghalia 281, were therefore analyzed to determine nondestructive maturity indices for optimal harvest regimes. Propagation experiments were run in central Uganda in 2015. A total of 216 tomato fruits were...

Author(s): Paul Okiror, Julius Bunny Lejju, Joseph Bahati, Grace Kagoro Rugunda and Collins Inno Sebuuwufu

Embryo-like structures and root regeneration induced by 2, 4-dichlorophenoxyacetic acid in twenty African sweet potato cultivars

April 2017

Embryo-like structures were induced from ‘whole leaf’ explants of sixteen of the twenty investigated sweet potato cultivars on Murashige and Skoog (1962) medium supplemented with 2,4 Dichlorophenoxyacetic acid (0.2 mg/L) at the Makerere University Agricultural Research Institute Tissue culture laboratory. Shoot and root regeneration was possible in the non-African cultivar, Jonathan, whereas only root...

Author(s): Abel Sefasi, Marc Ghislain, Andrew Kiggundu, Gorrettie Ssemakula, Runyararo Rukarwa, Robert Mwanga, Jan Kreuze and Settumba Mukasa

The performance of Soybean using Moringa as alley to improve soil productivity in North-Central Nigeria

April 2017

This study assesses the performance of intercropping Glycine max (Soybean) and Moringa oleifera under alley cropping in Abuja, Nigeria during the 2014 and 2015 cropping season. The field experiment was laid out in Randomized Complete Block Design (RCBD) with 3 replications. The replicates contained five plots each, separated between blocks by 1 m pathway and 0.5 m within the blocks. The plot measured 5.0 m × 4.0 m...

Author(s): Abdullahi, Ibrahim Ndaginna and Anyaegbu, Polycarp Ozobia

Response of Wheat (Tritium aestivum L.) to Variable Seed Rates: the Case of Hawassa Area, Southern Ethiopia

April 2017

Wheat serves as a staple food and feed for all over the world. In Ethiopia, wheat is one of the most important cultivated cereals ranking 4th in area coverage, 3nd in total production and 2nd in yield. A wheat seed rate of 125 kg ha-1 is usually used across most wheat growing areas of Ethiopia in any production conditions. In order to optimize seed rate and plant density of wheat, an experiment was conducted at the...

Author(s): Tewodros Ayalew, Bereket Abebe and Tarekegn Yoseph

Fertilizer micro-dosing in West African low-input cereals cropping: Benefits, challenges and improvement strategies

April 2017

Soil amendments are often unavailable in adequate quantities for increased crop production in smallholder cereal-based cropping systems in Africa. In order to increase crop yields and encourage farmers to apply inorganic fertilizers, fertilizer micro-dosing technology was developed. Fertilizer micro-dosing or “micro-fertilization” consists of the application of a small quantity of mineral fertilizer together...

Author(s): Okebalama C. Blessing, Ali Ibrahim, Ebenezer Y. Safo, Edward Yeboah, Robert C. Abaidoo, , Vincent Logah and Uzoh Ifeyinwa Monica

Study of chemical residues from Nemarioc-AL and Nemafric-BL phytonematicides in tomato fruit

March 2017

Pesticide chemical residues in produce and products are a global concern in human and animal diets. Nemarioc-AL (a.i. cucurbitacin A) and Nemafric-BL (a.i. cucurbitacin B) phytonematicides serve as alternatives to synthetic nematicides in the management of root-knot nematodes (Meloidogyne spp.) in tomato (Solanum lycorpersicum) production. Cucurbitacins are the bitterest chemical compounds, and therefore, could affect...

Author(s): Kagiso Given Shadung, Phatu William Mashela, Maboko Samuel Mphosi and Vusimuzi Ludwig Mulaudzi

Behavior and water needs of sesame under different irrigation regimes: III. Production and hydric efficiency

March 2017

This study aimed to identify the irrigation depth (305, 436, 567 and 698 mm), applied on the basis of crop evapotranspiration- ETc (the depth of 567 mm was equal to 100% of ETc) for best yield (Y) and water use efficiency (WUE) for irrigation and soil water stress tolerance (Ky) of sesame BRS 196 CNPA G4. The experiment was conducted at Embrapa Cotton, Barbalha County, CE State, Brazil, in 2012. The experimental design...

Author(s): José Rodrigues Pereira, Hugo Orlando Carvallo Guerra, João Henrique Zonta, José Renato Cortez Bezerra, Érica Samara Araújo Barbosa de Almeida and Whéllyson Pereira Araújo

Evaluation of a set of near isogenic lines (NILS) for rice yellow mottle virus (RYMV) resistance and farmers’ participatory varietal evaluation in Sierra Leone

March 2017

Rice yellow mottle virus (RYMV) is the most important rice - infecting virus in Africa.  Isolates of the virus were collected from Eastern, Southern and Northern Provinces of Sierra Leone and evaluated for pathogenicity on rice, using visual symptom rating and other disease-related traits such as plant height and yield depression. Near Iso-lines NIL 2, NIL 16, NIL 54 and NIL 130, developed by AfricaRice and...

Author(s): Taylor D. R. and Jalloh A. B.

Threshold aluminium toxicity in finger millet

March 2017

At high concentrations, Aluminium (Al) can be a serious threat to agricultural production because it inhibits growth of the roots, inducing oxidative stress, callose induction, peroxidation of the cellular membrane, nutrient imbalances and ends with cell death. This finding aimed to investigate threshold toxicity level of Al on finger millet varieties. The threshold value was determined by wrapping and germinating...

Author(s): Haftom Brhane, Edossa Fikru, Teklehaimanot Haileselassie and Kassahun Tesfaye

The determinants of small-scale irrigation practice and its contribution on household farm income: The case of Arba Minch Zuria Woreda, Southern Ethiopia

March 2017

This study was conducted at Arba Minch Zuria Woreda. The area lacks in-depth studies to identify the determinant factors that influence the use of irrigation water.  In the study area it is also not well known to what extent the households using irrigation water were better-off than those who depend on rain-fed agriculture. Therefore, the study was focused on assessing the determinants of small-scale irrigation...

Author(s): Agidew Abebe

Root and shoot growth responses of sorcoll163/07 and sorcoll141/07 sorghum landraces (Sorghum bicolor L.) Moench to different salt concentration levels

March 2017

Salt stress is one of the most adverse abiotic environmental factors that inhibit growth and productivity of plants. This experiment was carried out at physiology laboratory, Addis Ababa University. Sorghum landraces (sorcoll163/07 and sorcoll141/07) were collected with many other landraces from different sorghum growing regions of Ethiopia and they were selected for their stay-green traits and drought tolerance...

Author(s): Awol Assefa TOIB and Mekbib Fekadu GELAW

Distribution and abundance of emerging invasive weeds in central Western part of Ethiopia

March 2017

Invasive alien weed species; are non-indigenous species that have adverse economic, environment and ecological effects on habitats where they have been introduced, either accidentally or deliberately, outside their normal past or present distribution. The objective of this study was to determine the distribution and abundance of emerging invasive weeds in West Shewa and East Wollega Zones of Western Oromia. The...

Author(s): Amare Fufa, Taye Tessema and Niguse Hundessa

Determination of the soil compaction in real time on field with plate penetrometer and data filtering system

March 2017

Soil compaction due to traffic is the process whereby soil bulk density is increased. The compaction level depends on the weight of the vehicle, and the soil susceptibility to compaction, which is characterized by its mechanical properties (that is, the stress-strain relationships). The plate penetrometer can be used to quantify the levels of soil compaction in-situ and supply a larger number of information on the...

Author(s): Joaquim Odilon Pereira, Juliano Rodrigo Lamb, João Cândido Bracarense, Pauline Défossez, Guy Richard, Suedemio de Lima Silva, Roberto Vieira Pordeus and Marineide Jussara Diniz

Influence of different soil management practices on soil organisms and maize (Zea mays L.) yield in South Eastern Nigeria

March 2017

The experiment was conducted at Teaching and Research Farm of University of Port Harcourt between May and August, 2016 to determine the influence of different soil management practices on soil organisms and maize yield (Zea mays L.) in South Eastern Nigeria. The experiment consisted of six treatments, namely:  control (no application), cover crop (pumpkin cover), 10 t/ha dry guinea grass mulch (dead mulch), 10 t/ha...

Author(s): Benwari A. O., Uchunor S. I. and Omovbude S.

Rice mutants and their responses to suboptimal temperatures in the early stages of development

March 2017

The aim of this study was to verify differences in the tolerance to suboptimal temperatures of eight rice mutant genotypes in relation to their cultivars of origin in the initial stages of development. During the germination period, the germination percentage and the germination rate index were evaluated at temperatures of 25 and 13°C. For the vegetative stage enzymatic indicators, photosynthetic pigment...

Author(s): Andersom Milech Einhardt, Ariano Martins de Magalhães Júnior, Daiane de Pinho Benemann, Eugenia Jacira Bolacel Braga and José Antonio Peters

Live body weight and linear body measurements of indigenous sheep population in their production system for developing suitable selection criteria in Central Zone of Tigray, Northern Ethiopia

March 2017

The aim of this study was to characterize phenotype indigenous sheep population in central zone of Tigray. A total of 450 adult sheep were sampled randomly for this purpose. Based on dentition adult sheep were classified into four age categories. Average BW of the sampled sheep in Tanqua-Abergelle, Kola-Tembien and Adwa districts were (20.19±0.19, 22.18±0.22 and 23.68±0.33) kg, respectively....

Author(s): H.H. Tesfay, A.K. Banerjee and Y.Y. Mummed

Common bean (Phaseolus vulgaris L.) cultivars performance grown during offseason in cerrado soils

March 2017

The cultivation of that legume is widespread throughout the country presenting high expression in the social and economic issues. The aim of this work was to evaluate the agronomic characteristics and disease incidence in ten common bean (Phaseolus vulgaris L.) cultivars grown in Cerrado soils. The research was developed under field conditions during two cropping years. The studied cultivars were: IAC - Galante, IAC -...

Author(s): Rodrigo Ribeiro Fidelis, Taynar Coelho de Oliveira, Sérgio Alves de Sousa, Roberto Antonio Savelli Martinez, Raphael Campestrini, Danilo Pereira Ramos, Danilo Alves Veloso, Manoel Mota dos Santos and Kleycianne Ribeiro Marques

Effect of a biocide treatment on microbes in sweet sorghum juice

March 2017

Microbial contamination of sweet sorghum juice can result in loss of fermentable sugars used as bioproducts. A carbamate-based biocide in doses of 200 and 400 ppm used in the sugarcane industry was applied to sorghum juice collected from 4 and 8 in billets, or whole stalks, and growth of microbes was evaluated. Dosing with 200 ppm biocide reduced the microbial count in juice samples by approximately 99%, but a residual...

Author(s): Maureen S. Wright

Effect of seed-furrow openers on soybean root growth in compacted Oxisol

March 2017

This study aimed to evaluate the effects of seed-furrow openers and soil compaction on parameters such as sowing quality and root growth of soybean. The experiment was conducted using a randomized blocks experimental design with split plots, with the plots arranged by compaction level (1.16, 1.20, 1.22 and 1.26 Mg m-3) and the subplots by type of furrow opener (double disk and shank type). Root growth was assessed at...

Author(s): Alcir José Modolo, Gabrielli Fiorentin Dedordi, Thiago de Oliveira Vargas, Rivanildo Dallacort, Murilo Mesquita Baesso, José Ricardo da Rocha Campos, Robson Gonçalves Trentin, Gilberto Santos Andrade and Emerson Trogello

Vegetable breeding as a strategy of biofortification in carotenoids and prevention of vitamin A deficiency

March 2017

Carotenoids are a class of yellow-orange-red pigments distributed in various fruits, spices, herbs and especially in vegetables. These pigments are bioactive components essential to human health. Among the numerous classes of carotenoids, a smaller number is known for having provitamin A activity. This vitamin is essential to the organism in the proper functioning of the vision and the immune system. On the other hand,...

Author(s): Ronaldo Machado Junior, Ronaldo Silva Gomes, Cleverson Freitas de Almeida, Flavia Maria Alves, Fabio Teixeira Delazari, Renata Dias Freitas Laurindo, Rafael Henrique Fernandes and Derly José Henriques da Silva

Seed quality evaluation by tetrazolium staining during a desiccation study of the recalcitrant seeds of Carapa guianensis Aubl. and Carapa surinamensis Miq. - Meliaceae

March 2017

Crabwood, a popular name of several pantropical timber species, has become increasingly important for its seed oil of pharmaceutical and cosmetic use. Due to the recalcitrant character of the seeds, plantations are limited. The aim of this study was to develop a tetrazolium (TZ) staining protocol and validate viability staining with germination tests. Seed preparation was standardized in order to localize and cut the...

Author(s): Semirian Campos Amoêdo, and Isolde Dorothea Kossmann Ferraz

User perception towards a motorized thresher (‘Kungula’) in Uganda: A need finding survey

March 2017

Maize which remains the most important food crops in the sub-Saharan Africa is expected to register about a 10% drop in net production globally by 2055. Poor farming techniques, economic diversification in the developing countries due to increased industrialization, could partly explain this trend but addressing food security problem reflected in the world malnourished figures remains a core component of the sustainable...

Author(s): Deo Okure and Stephen Ssekanyo

Seed yield of onion (Allium cepa L.) as affected by bulb size and intra-row spacing

March 2017

Bombay Red’ is one of the most widely used onion cultivars in Ethiopia. Seed production of this cultivar is expanding among farmers. However, various constraints are reported for the low seed productivity of this cultivar, out of which inappropriate uses of bulb size and intra-row spacing are the most important ones. Therefore, a field experiment was conducted at Bati Futo watershed, Meskan Wereda, Southern...

Author(s): Ashenafi Haile, , Bizuayehu Tesfaye and Walelign Worku

Correlation and cluster analysis of white seeded sesame (Sesamum indicum L.) genotypes oil yield in northern Ethiopia

March 2017

The experiment was carried out to access the inter relationship of genotypes in their oil yield with seed yield, oil content and other yield components  and to determine cluster of white seeded sesame genotypes  and environments based on their oil yield. Seventeen sesame genotypes were tested at six environments in northern Ethiopia during 2015 main season. The experiment was laid out in Randomized Complete...

Author(s): Yirga Belay Kindeya

Appraisal of farmers’ wheat production constraints and breeding priorities in rust prone agro-ecologies of Ethiopia

March 2017

Ethiopia is the second largest producer of wheat in sub-Saharan Africa although yields remain considerably below the global average due to several production constraints. The aim of the study was to identify the primary threats to wheat production, farmers’ selection criteria for wheat varieties, and disease management practices with emphasis on wheat rusts in the Arsi, Bale and West Shewa administrative zones of...

Author(s): Netsanet Hei, Hussein Ali Shimelis and Mark Laing

Evaluating the impact of 2010 Rift Valley fever outbreaks on sheep numbers in three provinces of South Africa

March 2017

Whilst livestock production plays an increasingly important role in the economies of most nations, it remains vulnerable to diseases. Between 2008 and 2011 South Africa experienced episodes of Rift Valley fever (RVF) outbreaks. Losses of animals especially, sheep were widespread in the Free State, Northern Cape and Eastern Cape provinces. Despite the knowledge that the RVF outbreaks in 2010 affected farmers negatively,...

Author(s): Zimbini Mdlulwa and Cynthia B. Ngwane

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