African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6075

AJAR Articles

April 2019

Effect of fertilizers amendment on yield and yield components of wheat (Triticum aestivum L.) on acidic soil of Tsegede Highland, Northern Ethiopia

A field experiment was carried out during 2012/2013 on acidic soil of Tsegede highlands, Northern Ethiopia to evaluate wheat crop response to different Fertilizers and Liming with four treatments: (1) (No fertilizer), (2) 64 kg/ha Nitrogen+ 150 kg/ha Minjingu organic hyper phosphate fertilizer, (3) 64 kg/ha Nitrogen and 20 kg/ha Phosphorus, and (4) 64 kg/ha Nitrogen and 20 kg/ha Phosphorus + 4.17 t/ha lime were arranged...

Author(s): Gebremedhin Berhe Zenebe  

April 2019

Rice insect pest management in selected rice irrigation schemes in Morogoro Region, Tanzania

This study was conducted in five randomly selected rice schemes in Morogoro region to obtain information on farmers’ knowledge, attitude and practice in respect to management strategies undertaken for controlling insect pests both in rice fields and stores as an aid to reduce crop loss. A total of 150 farmers were randomly selected from 5 villages (30 respondents per village) and interviewed using semi structured...

Author(s): Mdangi M., Muhamba D., Massawe A. W. and Mulungu S. L.  

April 2019

Evaluation of dry matter yield, yield components and nutritive value of selected alfalfa (Medicago sativa L.) cultivars grown under Lowland Raya Valley, Northern Ethiopia

The experiment was conducted at Raya Azebo district, which is located in Southern Tigray, North Ethiopia, with the objective to investigate the highest dry matter yield and herbage nutritive value among the selected alfalfa cultivars.  The experiment was conducted by randomized complete block design with four replications and five cultivars. The experimental cultivars were FG-10-09 (F), FG-9-09 (F), Magna-801-FG...

Author(s): Solomon Wayu and Tesfay Atsbha  

April 2019

Vulnerability and adaptation strategies to drought and erratic rains as key extreme events: Insights from small scale farming households in mixed crop agro ecosystems of semi-arid eastern Kenya

Climate variability and change are some of the most pressing environmental challenges in semi-arid Kenya and Sub Saharan Africa (SSA) and are associated with persistent droughts, dry spells and erratic rains. The present study aimed at determining exposure and adaptation mechanisms among selected small-scale farmers cultivating drought tolerant crops in Wote, Makueni County, Eastern Kenya in the period 2003 to 2013. The...

Author(s): Borona Mwenda, Dionysius Kiambi, James Kungu, Jeske Van De Gevel, Carlo Farda and Yasuyuki Morimoto  

April 2019

Mechanisms of aerenchyma formation in maize roots

Respiration is very sensitive to waterlogged conditions. Under these conditions, plant roots suffer from lack of available oxygen. In fact, waterlogging reduces the exchange of gases between the plant and the atmosphere. When plants cannot receive sufficient oxygen level for respiration, they form aerenchyma in their roots which function as reservoirs of oxygen in the submerged plant. Aerenchyma is formed in maize (Zea...

Author(s): Imene Rajhi and Haythem Mhadhbi  

April 2019

Yield of the hydroponic lettuce under levels of salinity of the nutrient solution

Hydroponic cultivation is a viable alternative, given the water scarcity scenario, since this technique uses water rationally and without waste. However, it is necessary to monitor the salinity of the nutrient solution, especially in leafy vegetables such as lettuce. The aim of this research is to examine the yield of hydroponic lettuce under different salinity levels of the nutrient solution, in greenhouse. The...

Author(s): P. F. Silva, R. M. Matos, S. M. Bonou, T. G. Sobrinho, V. E. Borges, J. Dantas Neto and A. P. Melo Júnior  

March 2019

A review on golden species of Zingiberaceae family around the world: Genus Curcuma

Genus Curcuma has a long history of traditional uses, ranging from folk medicine to its culinary uses. More than 70 species of Curcuma are distributed throughout the world but extensively cultivate in Asian, Australian and Western African counties. Many phytochemical, pharmacological and molecular studies have been conducted on several Curcuma species worldwide. The interest on its medicinal properties have increased...

Author(s): Ewon Kaliyadasa and Bhagya A. Samarasinghe  

March 2019

Nutritional status of three sugarcane varieties grown in the northeast region of Brazil

The diagnosis of plant nutritional status was a tool to improve crop fertilization and thus ensure better productivity. This study aimed to evaluate the nutritional status of three sugarcane varieties (RB92579, RB98710 and RB961552) in the plant-cane and first regrowth cycles in the sub-humid region of the state of Alagoas, located in the Northeast of Brazil. The experiment consisted of a randomized complete block...

Author(s): Daniele Costa de Oliveira, Mauro Wagner de Oliveira, Vinicius Santos Gomes da Silva, Terezinha Bezerra Albino Oliveira, Hugo Henrique Costa do Nascimento and Siglea Sanna de Freitas Chaves  

March 2019

Mathematical modelling of greenhouse drying of red chilli pepper

The purpose of this study was to examine twelve different mathematical models for red pepper plant (Capsicum annum L.) and to investigate the appropriate models of mass fraction (Mt / Mo) in relation to drying time.This study attempted to assess the efficiency and profitability of the drying of red pepper under the plastic tunnel greenhouse and a total of twelve models, including Newton, Page, Improved Page, Henderson...

Author(s): Bekir YELMEN, Çağrı ÜN,  Havva Hande ŞAHİN and  Mert YÜKSEKDAĞ  

March 2019

A synthesis of Ethiopian agricultural technical efficiency: A meta-analysis

In Ethiopia, technical efficiency studies started about three decades ago. These studies have reached different conclusions regarding agriculture efficiency based on technical efficiency scores. This study represents the first attempt to use meta-analysis to examine the mean technical efficiency estimates in agriculture in Ethiopia. The current study employed 45 frontier studies published from 1993 to 2014 for the...

Author(s): Tesfaye Solomon and Tadele Mamo  

March 2019

Reputation effect of the moral hazard on contract farming market development: Game theory application on rice farmers in Benin

A good reputation is the basis for rice farmers to survive and gain trust from buyers in a competitive business environment. However, due to the existence of information asymmetry between buyers and rice farmers, the moral hazard problem is the key obstacle that impedes the benefits of related shareholders and hinders the efficiency of contract farming negotiations. It is crucial to design a control mechanism to avoid...

Author(s): Odountan Ambaliou Olounlade, Li Gu-Cheng, Lacina Traoré, N’banan Ouattara, François Vihôdé Dossouhoui and Gauthier Biaou  

March 2019

Sorption-desorption isotherms of diuron alone and in a mixture in soils with different physico-chemical properties

Herbicide mixture is a widely used weed control practice in many agricultural areas. However, interactions between the herbicide mixture and soil may alter the soil dynamics. This research evaluated the effect of the physicochemical properties of the soils in the application of diuron alone and in a mixture with hexazinone, by means of sorption-desorption Freundlich isotherms. 14C-diuron sorption (isolated and mixed)...

Author(s): Vanessa Takeshita, Kassio Ferreira Mendes, Pedro Jacob Christoffoleti, Valdemar Luiz Tornisielo and Ana Carolina Dias Guimarães  

March 2019

Phenotypic plasticity in soybean (Glycine max (Merrill)) genotypes with contrasting growth characteristics subjected to planting density stress at different developmental stages

A study was conducted to determine phenotype plasticity responses in soybean genotypes subjected to plant density stress at different phenological stages. Plants planted at supra optimal population density (500,000 plants per hectare) were thinned to 400,000 population density at 4 developmental stages: V1 (Full expansion of first trifoliate leaves), V3 (Four nodes with 3 unfolded trifoliates), V6 (Seven nodes, with 6...

Author(s): Mebelo MATAA and Isaac SICHILIMA

March 2019

Soil hydro-physical attributes under management practices for pineapple genotypes cultivation

Pineapple is a rustic species but may respond positively to conservation practices of soil management. This work aimed to evaluate the physical properties of the soil under conservation management practices for the cultivation of pineapple genotypes. The treatments consisted of four varieties of pineapple, two levels of gypsum (0 to 4 t ha-1), two levels of management (with and without cover crop - millet), and two soil...

Author(s): Wanderson Mendes Martins, Leonarda Grillo Neves, Kelly Lana Araújo, Adriel Fernandes Correa, Walmes Marques Zeviani, Bruno Montoani Silva, Leonarda Grillo Neves, Thiago Alexandre Santana Gilio and Milson Evaldo Serafim  

March 2019

Aries Guineagrass (Megathyrsus maximus Jacq cv. Aries) pasture establishment without chemical control in an environmentally protected area

This study aimed to evaluate the Aries Guineagrass (Megathyrsus maximus sin. Panicum maximum Jacq. cv. Aries) and the weed community dynamics under different soil tillage and sowing methods in Southern Brazil, to create alternatives for sustainable farming in areas where weed chemical control is restricted. The experiment was carried out in split-plot design with randomized blocks and four replications; the main plots...

Author(s): Carlos H. G. Coimbra, Sebastião B. C. Lustosa, Leonardo Deiss, Anibal de Moraes, Edilson B. de Oliveira and Alda L. G. Monteiro  

March 2019

Foodborne diseases, fish and the case of Aeromonas spp.

Food intake is an imperative need of living beings in order to obtain the nutrients and energy necessary for their growth and development. All human beings worldwide have the right to access to nutritious and safe food. Food safety is a term that has become increasingly important in food production; is defined as the set of conditions and actions necessary along all phases of the food chain (from its primary production...

Author(s): Alejandro De Jesús Cortés-Sánchez, Luis Daniel Espinosa-Chaurand, Rodolfo Garza-Torres, Mayra Diaz-Ramirez, Ma. De La Paz Salgado-Cruz, Lilia Sánchez-Minutii  and Raquel García-Barrientos  

March 2019

Application of nitrogen in different phenological states of the corn crop

Corn is a crop of high productive potential, but to achieve this, it is essential to apply production technologies, especially fertilizers with a high level of nitrogen. The objective of this work was to evaluate the influence of nitrogen fertilizer in different phenological stages on corn production. The experiment was installed in the experimental plot of the Facultad de Ciencias Agrarias, Universidad Nacional de...

Author(s): Eulalio Morel López, Florencio David Valdez Ocampo, Amílcar Isidro Servín Niz, Modesto Osmar Da Silva Oviedo, Oscar Caballero Casuriaga, Wilfrido Lugo Pereira, Derlys Fernando López Ávalos, Carlos Alberto Mongelos Barrios, Edith Ruiz Díaz and Ruth Ester Pistilli  

March 2019

Effects of biogas slurry and conventional fertilizer on the abundance, diversity, and function of the soil microbe community in continuously cropped Chinese chives

The effects of biogass slurry and conventional chemical fertilizer as topdressings on relative abundance and community diversity of soil microbes in fields under continuous cropping of Chinese chives were investigated. It was found that topdressing treatment altered soil bacteria community and diversity, where relative abundance and taxonomic diversity were greater in the biogas slurry treatment. Although average well...

Author(s): Fengling Guo, Jinping Wu, Zhenbiao Jiao, Jie Zhou, Jiaping Fu, Qinglin Li and Zhengming Qiu  

March 2019

Development and technical validation of spray kit for coffee harvester

Spraying a coffee plantation simultaneously with harvesting ensures that the coffee plants are protected from pests and diseases, which are intensified during this period. In addition to economical operation, the pulverizer adapted to all harvester models promotes greater uniformity in pulverized syrup dispensing since the spray tips are arranged evenly around the plant. Two experiments were carried out in the...

Author(s): Felipe Santinato, Carlos Diego da Silva, Rouverson Pereira da Silva, Antônio Tassio Silva Ormond, Victor Afonso Reis Gonçalves and Roberto Santinato  

March 2019

Pig compost for the formation of coffee seedlings in the substrate composition

Pigs can be used in the formation of coffee seedlings; it gradually provides essential nutrients for the development of plants, in addition to promoting the improvement of the substrate and water retention. It was decided, with this work, to evaluate the use of pig compost in the formation of coffee seedlings. The topics studied were: T1 - Witness (absence of organic compound); T2-30% concentration of cattle compost;...

Author(s): Felipe Santinato, Carlos Diego da Silva, Renato de Mello Prado, Caio Fernando Eckhardt Souza, Victor Afonso Reis Gonçalves and Roberto Santinato  

March 2019

Correlation of climatic elements with phases of the lace bug Vatiga illudens (Hemiptera: Tingidae) in two cassava cultivars (Manihot esculenta Crantz, Euphorbiaceae)

Cassava (Manihot esculenta Crantz) is subject to various disease problems and insect attacks. The aim of this study was to evaluate the correlations of climatic elements on the phases of the lacebug, Vatiga illudens in two cultivars of cassava. The study was carried out in a greenhouse using the ‘Sergipana’ and ‘Campina’ cultivars. Data were analyzed using the Pearson index for linear...

Author(s): Joice Kessia Barbosa dos Santos, Tamara Taís dos Santos, Aleyres Bispo Chagas, Eliane dos Santos, Adriely Vital de Souza, Diego Jorge da Silva, Alverlan da Silva Araujo, Rodrigo Almeida Pinheiro, João Pedro Ferreira Barbosa, Jhonatan David Santos das Neves, Ana Paula Gonçalves da Silva Wengrat and Rubens Pessoa de Barros  

March 2019

Comparison of cyanobacterial bio-fertilizer with urea on three crops and two soils of Ethiopia

Although chemical fertilizers have long been used to meet the high demand of nitrogen (N), the most common limiting nutrient to plant growth, the frequent use of this fertilizer gradually deteriorates soil fertility in addition to its high cost, lower supply and agronomic use efficiency in Ethiopia. Nevertheless, N-fixing cyanobacterial biofertilizers are eco-friendly, and currently considered important to support the...

Author(s): Mulat Asmamaw, Girma Wolde, Mekiso Yohannes, Solomon Yigrem, Endalkachew Woldemeskel, Alemayehu Chala and Jessica G. Davis      

March 2019

Genetic variation and heritability of kernel physical quality traits and their association with selected agronomic traits in groundnut (Arachis hypogeae) genotypes from Uganda

Breeding for improvement of physical kernel traits has a direct implication on acceptance of groundnut varieties. However, the genetic parameters associated with these traits are not well documented. Ten groundnut lines were evaluated in a Randomized Complete Block Design experiment with three replicates in 2015. Data were collected on yield parameters and pod and kernel physical traits. Mean values were used to...

Author(s): R. Kakeeto,, S. D. Baguma, R. Subire, J. Kaheru, E. Karungi and M. Biruma  

March 2019

Evaluation of the effectiveness of different trap designs for the monitoring of Drosophila suzukii (Matsumura, 1931) (Diptera: Drosophilidae) in blackberry crop

Spotted Wing Drosophila (SWD), Drosophila suzukii is one of the most important pests in berry crops around the world. In this study, different models of traps were evaluated for monitoring adult SWD. The study was conducted in a commercial blackberry orchard of the cultivar Chester, in the municipality of Vacaria, RS, Brazil in May 2016. The treatments consisted of three trap designs, namely the European model...

Author(s): Regis Sivori Silva dos Santos, Daniela Fernanda Klesener, Lucas de Almeida Bizotto and Lucas de Ross Marchioretto  

March 2019

Analysis of factors affecting the demand for inorganic fertilizer in Boricha and Wondogenet Districts, Southern Ethiopia

A study was undertaken to analyze factors affecting the demand for inorganic fertilizer in Boricha and Wondogenet farming Districts, Southern Ethiopia. Data on  gender, educational level, farming experience, health status, soil fertility status, organic fertilizer used, access to inorganic fertilizer, ownership and size of cultivated farm, on-farm income, contact with DAs, availability of certified seed, and credit...

Author(s): Yirssaw Demeke Ambaw  

February 2019

Potential use of rhizobium for vegetable crops growth promotion

The system of vegetable crops production required large amounts of mineral fertilizers. One of the possible alternatives to assure the economic and environmental sustainability of this production system would be the use of promoting growth plant rhizobacteria (PGPR). However, care is needed to select a microorganism to be used in crops that are usually consumed raw, so human health is not at risk. It was important to...

Author(s): C. S. Borges, E. L. Saccol de Sá, A. W. Muniz and B. D. Osorio Filho  

February 2019

Effect of foliar application of iron on seasonal changes of some physical and chemical properties in berries of Halwani Lebanon grape cultivar (Vitis vinifera L.)

A field experiment was conducted in 2009 and 2010 growing seasons, to study the effect of foliar application of iron- chelated "Fe-EDTA" (0, 100 and 200 mg.l-1) on the seasonal dynamic of some physical and chemical properties of berries of Halwani Lebanon grape cultivar, grown on a calcareous soil in Mosul region,  Iraq. The results revealed that the foliar application of 100 mgFe.l-1 caused a significant...

Author(s): Nabil M. Ameen Abdullah Al-Imam  

February 2019

Seed germination of seeds preserved for about 20 years and that of seeds preserved for several years

From the herbage seeds, only alfalfa (Medicago sativa) showed about 3 - 5% germination ratio for 20 years old seeds. The results are consistent with that of Park and Kim (2009). No germination was observed from the other herbage species, but the decay of seeds were observed sometimes. However, the vegetable seeds preserved for several years showed high germination ratios. In conclusion, older seeds generally germinate a...

Author(s): Byung Hoon PARK, Ji Hwan JEONG, Deok Joong KIM, Yoon Ho PARK, Young Hoon CHO, Min Joo KANG, Gang Yong KIM, Sun Ho JANG, Dong Hyan JUNG, Hee Soo CHOI, Jin Woo SON, Hyun Sung KANG, Min Sun KIM, Jung Won LEE and Sangdeog A. KIM  

February 2019

Malt Barley (Hordeum distichon L.) varieties performance evaluation in North Shewa, Ethiopia

Malt barley is the most important cereal crop grown in highland parts of Ethiopia. Even though Ethiopia has favorable environment and potential market opportunity, the share of malting barley production is quite low (about 15%) as compared to food barley. One reason for low production is the use of low yielding varieties. The present investigation was conducted in a randomized complete block design with three...

Author(s): Wegayehu Felek Bizuneh and Derib Alemu Abebe  

February 2019

Calibration and validation of CERES-wheat in DSSAT model for yield simulation under future climate in Adet, North Western Ethiopia

Crop models are highly useful for simulating crop and soil processes in response to variations in climate and crop management. However, well estimated crop genetic coefficients are required. So the purpose of this study is to calibrate and evaluate the performance of CERES-wheat model and to simulate the climate change impacts on phonological stages and grain yield of bread wheat (Tay and Senkegna varieties) in the...

Author(s): Endalew Assefa Abera  

February 2019

Enhancing agricultural sustainability and productivity under changing climate conditions through improved agroforestry practices in smallholder farming systems in Sub-Saharan Africa

Fighting climate change and its nefarious effects is at the forefront of the United Nations’ SDGs, agenda 2030. This comes at a time when the global climate is changing rapidly owing to increasing concentration of carbon dioxide (CO2) and other greenhouse gases (GHGs) in the atmosphere resulting principally from fossil fuel combustion and agricultural lands taking the place of tropical forests. Climate change...

Author(s): Nyong P. Awazi and Martin N. Tchamba  

February 2019

Evaluation of improved potato (Solanum tuberosum L.) varieties for some quality attributes at Shebench Woreda of Bench-Maji Zone, Southwestern Ethiopia

In Ethiopia, potato sub-sector is expanding, with more value added products, such as potato chips, mainly due to increasing demands associated with growth of population and urbanization. Processing industry is very dependent on the quality parameters of tuber to satisfy the increasing demand of customers. Thus, this experiment was conducted with the objective to evaluate the quality of some improved potato varieties at...

Author(s): Tilahun Bekele and Bewuketu Haile  

February 2019

Involving small holder farmers in the agricultural land use planning process using Analytic Hierarchy Process in rice farming systems of Kilombero Valley, Tanzania

Despite the truth that the agricultural land use planning exercises have so far covered small and fragmented part of the African continent, the involvement of farmers who are among the direct beneficiaries of the outputs have been limited. This work demonstrates the contributions of farmers on the land use planning process for rice production in Kilombero Valley, Tanzania. Analytic hierarchic process (AHP) was used to...

Author(s): Boniface H. J. Massawe, Abel K. Kaaya and Brian K. Slater  

February 2019

Boosting self-sufficiency in maize crop production in Osisioma Ngwa Local Government with internet of things (IOT)-climate messaging: A model

The cultivation of maize round the year is a great challenge to both subsistence and mechanized farmers in Abia State owing to the changes in climatic conditions especially precipitation, relative humidity, and temperature during the two traditional seasons, which affect the growth and yield of the cereal crop. This paper is the first of a two-part study aimed to evolving an internet-based remote monitoring and...

Author(s): Wilson Nwankwo, Akinola S. Olayinka and Chinecherem Umezuruike  

February 2019

Genetic variability of common bean (Phaseolus vulgaris L.) genotypes under sole and maize-bean cropping systems in Bako, Western Oromia, Ethiopia

Knowledge of the sources and magnitude of variability among genotypes plays a pivotal role in any crop improvement program to maximize gains from selection. This experiment was conducted at Bako Agricultural Research Center in 2011 cropping season with the objective of studying and estimating the extent of genetic variability in common bean genotypes under sole and mixed cropping systems. Meanwhile, the wider range of...

Author(s): Kassa Mammo, Dagne Wegary, Dagnachew Lule and Firew Mekbib  

February 2019

Fungal endophytes in bananas cv Manzano affected by Fusarium

Endophytes microorganisms have the potential to control vascular diseases caused by Fusarium spp. which does not have an effective chemical control. In this study, endophytes populations present in Manzano -apple bananas- affected by Fusarium oxysporum f. sp. cubense race 1 were studied. Endophytes were isolated in two commercial farms in Urabá-Colombia, taking leaf, pseudostem, corm and root tissues from healthy...

Author(s): Sebastián Zapata Henao, María Camila Henao Vásquez, Luis Fernando Patiño Hoyos, Jaiver Danilo Sánchez Torres and Lilliana María Hoyos-Carvajal  

February 2019

Selection of cassava (Manihot esculenta Crantz) genotypes based on agro-morphological traits in Angola

The aim of the present study is to select superior cassava genotypes based on agro-morphological traits using three non-parametric indices and to correlate them in order to verify the degree of agreement between them. Traits such as number of branches, plant height, stem diameter, distance between internodes, height of the first branch, number of roots, root diameter, root length, shoot yield and root yield in...

Author(s): Sandra Domingos João Afonso, Carlos Alberto da Silva Ledo, Ricardo Franco Cunha Moreira, Vanderlei da Silva Santos, Viviane Peixoto Borges and Pascoal António Muondo  

February 2019

Effect of different doses of Azospirillum brasilense and nitrogen fertilizer in wheat crop

The objective of the present work is to evaluate the effect of different doses of nitrogen combined with different doses of A. brasilense in the agronomic characteristics of wheat. The experiment was conducted in Curuguaty, Paraguay in 2017 and the variety used was Canindé 11. The experimental design is a completely randomized block with factorial ordering and four repetitions. The treatments are a combination...

Author(s): Diosnel A. M., Milciades A. M. A, Walter V., Miguel B., Ever M. C., Marcos J. M., Rafael F., Modesto da Silva H. and Wilfrido D. L.  

February 2019

Photosynthetic profiles and nutrimental characterization of yellow mango in Mexico

Worldwide, Mexico represents the first exporter of mango. However, in recent years mango exports have decreased by 29 points due to a change in the preference of the American market; hence, it is essential to diversify the supply of mangoes exports. Measurement of the net photosynthesis response and internal CO2 concentrations can provide data on important parameters of the physiology of a variety; these have been...

Author(s): Betsabe Piedragil-Ocampo, Elías Hernández-Castro, José Antonio Mora Aguilera, Agustín Damián-Nava, Francisco Palemón Alberto, Gregorio Sarabia Ruiz and Abraham  Monteón-Ojeda  

February 2019

Use of vegetable oils in the control of Colletotrichum sp. in banana fruits

Anthracnose is a disease caused by the fungus of the genus Colletotrichum. It is considered an important post-harvest disease in fruits of banana (Musa sp.) which depreciates the commercial value of the fruit. The use of vegetable oils to control fungal growth and disease progression in plants is an important alternative to minimize the deleterious effects of toxic chemicals. Studies were carried out to evaluate the...

Author(s): Antonia Fabiana Barros de Lima, Luan de Oliveira Nascimento, Gleisson de Oliveira Nascimento, Ruthe Lima Souza, Josimar Batista Ferreira, William Ferreira Alves, Francisco Ian Oliveira Nascimento and Givanildo Pereira Ortega

February 2019

Maize-lupine intercrop response to applied nitrogen and phosphorus in North-Western Ethiopia

Maize (Zea mays) is a major staple crop in North-Western Ethiopia. Narrow leaf lupine (Lupinus angustifolius) grain is a commercial concentrates for livestock feed. Maize-lupine intercropping is a sustainable and emerging crop production approach for the resource poor smallholder farmers of North-Western Ethiopia; however, there is no recommended fertilizer rate for the intercrop. Therefore, field experiment was...

Author(s): Alemayehu Assefa, Charles S Wortmann, Yigzaw Dessalegn, Kinde Tesfaye, Tamado Tana and Nigussie Dechassa  

February 2019

Growth of parica seedlings (Schizolobium amazonicum Huber ex Ducke) cultivated in different organic substrates

The forest plantations depends on appropriate initial seedling establishment, which occurs when primary factors (water, light, CO2 and nutrients) are within appropriate ranges. The purpose this study was to evaluate the growth of young parica plants (Schizolobium amazonicum Huber ex Ducke) grown in different organic substrates (chicken manure, goat manure and organic matter) in proportions of 5, 10, 15 and 20% in yellow...

Author(s): Sabrina Silva de Oliveira, Gleisson de Oliveira Nascimento, Diego Pereira de Souza, Luan de Oliveira Nascimento, Samara da Silva Oliveira, José Francisco de Carvalho Gonçalves, Josimar Batista Ferreira and Eliane de Oliveira

February 2019

Virulence and characterization of isolates of potato bacterial wilt caused by Ralstonia solanacearum (Smith) in Rwanda

Bacterial wilt (Ralstonia solanacearum) is one of the major potato diseases in Rwanda. An in vitro study was carried out to identify and characterize the pathogen isolated from three potato cultivars (Kinigi, Kirundo and Gikungu) in Rwanda. This was achieved by cultural and morphological tests on triphenyl tetrazolium chloride (TTC) and casamino peptone glucose (CPG) agar as well as biochemical tests through Gram...

Author(s): M. C. Mutimawurugo, I. N. Wagara, J. B. Muhinyuza and J. O. Ogweno  

February 2019

An assessment of adaptation options enhancing smallholder farmers’ resilience to climate variability and change: Case of Mbengwi Central Sub-Division, North-West Region of Cameroon

Farmers’ implementation of suitable adaptation measures in the face of climate variability and change (CVC) depends first and foremost on their ability to perceive CVC. This paper analyzes the adaptation measures implemented by smallholder farmers (SHFs) in Mbengwi Central Sub-Division, North-West Region of Cameroon in the face of CVC as well as the determinants of smallholder farmers’ choice of adaptation...

Author(s): Nyong Princely Awazi, Martin Ngankam Tchamba and Fritz Oben Tabi  

February 2019

Comparison of bioslurry to common nitrogen sources on potato (Solanum tuberosum L.) yield and yield components in andisols and oxisols of Northern Rwanda

This study evaluated the effect of bioslurry from on-farm biogas production units and other sources of nitrogen fertilizer on Irish potato yield and yield components in northern Rwanda. To achieve this, an on-farm experiment was undertaken in the Andisols of Musanze District and the Oxisols of Gicumbi District in 2012. Three farms were selected to host the study in each District. Six treatments were randomly tested in...

Author(s): Karemangingo Charles, Aloys Fashaho and Judith Uwihirwe

February 2019

Biomass accumulation and potassium concentrations in tissue of Teff (Eragrostis tef Zucc. Trotter) at three growth stages in Vertisols and Nitisols of the Central Highlands of Ethiopia

Understanding the physiology and time-course of above ground biomass (AGBM) and potassium (K) accumulation pattern in plants and removal from soil is essential to simultaneously increase crop yield and synchronize K demand and K supply, thereby predict crop yield. It is also an essential criterion for optimizing fertilizer practices, and may help to enhance soil and crop quality. A pot experiment was conducted using...

Author(s): Mulugeta Demiss, Sheleme Beyene and Selamyihun Kidanu  

February 2019

Isotopic signature of the relation between environment and the quality of spatial coffee

The intrinsic quality of the Bourbon cultivar is well known for a high level of sweetness, intense aroma and pleasant acidity. With the evident relationship between product quality and the environment in mind, the need arises for scientific studies to provide a foundation for discrimination of product origin. Given this context, the aim of this study was to evaluate the use of stable isotopes in discrimination of...

Author(s): Barbosa J. N., Borem F. M., Alves H. M. R,  Cirillo M. A and Hanson C.  M. F. M. da S  

February 2019

Osmotic stress in Chenopodium quinoa Willd.: Variations in osmoprotectants at different phenological stages

Chenopodium quinoa Willd. is an edible crop plant adapted to the climatic conditions of the South American Andes, where it thrives under extreme environmental conditions such as saline soils, drought, high UV radiation and broad temperature fluctuations. The prolonged exposure of this crop to high salinity and low relative humidity has promoted the development of efficient mechanisms to retain water within the...

Author(s): José Delatorre-Herrera, Javier Rojas-Urrutia, Leonel E. Rojo and Brittany L. Graf  

February 2019

Different dry matters content used for the conservation of annual ryegrass (Lolium multiflorum Lam.) in anaerobic environment

Annual ryegrass (Lolium multiflorum Lam.) is widely used for feeding ruminants, and the conservation of this material as haylage can be an alternative to farms. The aim of this work is to study the nutritional and microbiological value of annual ryegrass (L. multiflorum Lam.) pre-dried and stored with different dry matter contents (250, 350, 450, 550, 650 and 750 g kg-1) in anaerobic environment. The experimental design...

Author(s): Taiani Ourique Gayer, Neliton Flores Kasper, Leonardo Ereno Tadielo, Rodrigo Holz Krolow, Eduardo Bohrer de Azevedo, Ricardo Pedroso Oaigen and Deise Dalazen Castagnara  

January 2019

Effects of reduced spacing on maize productivity, CO2 assimilation and gas exchange

The objective of this study is to evaluate the interference of reduced spacing in the physiological and characteristics production components of maize hybrids (Zea mays L.). Four line spacings (95, 80, 60 and 40 cm) were tested using three commercial hybrids (H1, H2 and H3) in Senador Guiomard, Acre, Brazil. The experimental design of randomized complete blocks was used in subdivided plots. The experiment lasted four...

Author(s): Luan de Oliveira Nascimento, Josimar Batista Ferreira, Marcio de Oliveira Martins, Gleisson de Oliveira Nascimento and Antonia Fabiana Barros de Lima  

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