African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6559

Table of Content: April 2009; 4(4)

April 2009

Yield and fruit quality performance of Nova and Robinson mandarins on three rootstocks in Eastern Mediterranean

Yield and fruit quality performances of Nova and Robinson mandarins were evaluated in the Mediterranean climate of Dörtyol, Hatay, Turkey from 2002 to 2007. The cumulative yields of both Nova and Robinson mandarins over this 6 year production period were highest on Carrizo citrange and smallest on Troyer citrange. The fruit weight and seed content were affected by the rootstock in Nova mandarin. The heaviest fruits...

Author(s): T. H. Demirkeser, M. Kaplankıran, C. Toplu and E. Yıldız      

April 2009

Farmer participatory assessment of two researcher-managed ‘fertilizer tree systems in Southern Malawi

The suitability of maize under two fertilizer tree fallow systems were evaluated by farmers at Makoka Agricultural Research Station in southern Malawi. Sixty-eight farmers drawn from five farmer groups assessed Gliricidia-maize intercropping system, and 72 farmers assessed rotational fallows with 10 trees species during 2001. Fertilizer treatments and maize plots served as controls. Gliricidia-maize plot without...

Author(s): Akinnifesi F. K., Makumba W., Sileshi G. W. and Ajayi O. C.      

April 2009

Spatial rooting patterns of Gliricidia, pigeon pea and maize intercrops and effect on profile soil N and P distribution in southern Malawi

The concept of competition or complementarity between tree and crop roots for below ground resources have been a major debate in simultaneous systems. Root studies were conducted in three cropping systems, namely: sole maize, pigeon pea/maize intercropping and Gliricidia sepium (Gliricidia)/maize intercropping, with the objective of understanding the potential for competition or otherwise. Pigeon pea and maize...

Author(s): Wilkson Makumba, Festus K. Akinnifesi and Bert H. Janssen    

April 2009

Effect of soil moisture stress on the growth of Corchorus olitorius L.

Effect of soil moisture stress on the growth of Corchorus olitorius L. was investigated using two varieties in the glass house during summer at Tokyo, Japan. Smaller growth was showed in light moisture stress (60 - 50%) and acute moisture stress (40 - 30%) comparing to that of field capacity soil moisture, however the growth in light and acute moisture stress was not much...

Author(s): H. Shiwachi, M. Komoda, K. Koshio and H. Takahashi    

April 2009

Assessment of livelihood assets and strategies among tobacco and non tobacco growing households in south Nyanza region, Kenya

This study assessed household assets and livelihood strategies among tobacco-growing households in comparison to non-tobacco-growing households in the south Nyanza region, Kenya. It was meant to provide basic information that could be used to advice on local enforcement of Article 17 of the WHO Framework Convention on Tobacco Control (FCTC) through crop and livelihood diversification as an alternative strategy to...

Author(s): J. K. Kibwage, A. J. Odondo and G. M. Momanyi     : 

April 2009

Factors affecting agricultural extension services in Northeast Anatolia Region

Agricultural sector is one of the most sluggish and inefficient sectors in Turkey, the main reasons behind this are excessive rural population, small farm sizes and inefficient farm management. One of the most important tools to solve these issues is the extension service. This study aims to find out the factors that influence the people’s incentives to receive extension services in Northeast Anatolia region of...

Author(s): Tecer Atsan, H. Bayram Isik, Fahri Yavuz and Ziya Yurttas        

April 2009

Exploratory and multidisciplinary survey of the cowpea network in the Tolon-Kumbungu district of Ghana: A food sovereignty perspective

An exploratory survey of selected deprived communities in the Tolon-Kumbungu district of northern region of Ghana was conducted in August 2007 by a multi-disciplinary team of social scientist, food technologist, plant breeder and food nutritionist. The survey sought to identify with farmers their critical agronomic needs and production constraints in order to develop appropriate breeding strategies, as well as cowpea...

Author(s): Wilhemina Quaye, Kwadwo Adofo, Yann Madode and Abizari Abdul-Razak        

April 2009

Constraints to the delivery of clean seed yams in the lowland sub-humid tropics of Nigeria: The supply chain approach

An investigation into the seed yam supply chain was carried out to identify the components of commercial seed yam supply systems, which affect the supply of clean seed yams by smallholder farmers in Nigeria. Up to 108 respondents were used to generate data for the analysis. Data were analyzed using simple descriptive statistics. A one-way analysis of variance (ANOVA) was used to capture the mean ratings across the...

Author(s): Simon Ibana, Ben Odoemena, J. O. Akintola , Damian Ihedioha and Okoli Paul    

April 2009

Pestalotia spp. causes leaf spot of Vitellaria paradoxa in Ghana

Attempts were made at Bole, Ghana to determine the incidence and severity of leaf spot of Vitellaria paradoxa (shea), identify the causal pathogen and alternative hosts, and assess the impact of disease incidence on shea nut yield. Each of 4960 shea trees and surrounding herbs, shrubs or trees were inspected for symptoms of leaf spots. Disease severity was scored on a scale of 0 to 4 on each of 30 leaves...

Author(s): A. Y. Akrofi and F. M. Amoah      

April 2009

Assessing the sweetpotato virus disease and its associated vectors in northwestern Tanzania and central Uganda

A study was conducted in sweet potato farmers’ fields in Tanzania and Uganda to determine the status of sweet potato virus disease (SPVD) incidence and its vectors. SPVD incidence was high (66 to 100%) in Tanzania but low (10 - 40%) in Uganda. SPVD symptom expression and severity were highly variable both within and between countries. Whitefly (Bemisia tabaci) but not aphids were observed in all the fields...

Author(s): Joseph Ndunguru, Regina Kapinga, Peter Sseruwagi, Bulili Sayi, Robert Mwanga, Silver Tumwegamire and Celestine Rugutu    

April 2009

Effects of ethanolic extracts of Garcinia kola seeds on growth and haematology of catfish (Clarias gariepinus) broodstock

A 56 day study was undertaken to evaluate the effects of dietary ethanolic extracts of Garcinia kola (Bitter kola) in African catfish, Clarias gariepinus broodstock on growth performance and basic haematological indices. Catfish broodstock (mean weight, 245.20 – 255.00 g) were randomly distributed into concrete tanks (2 x 2 x 1.2 m) at 10 fish/tank in triplicate treatments. 5 diets (40%...

Author(s): A. A. Dada and M. Ikuerowo      

April 2009

Efficiency of selenium ion inclusion into common carp (Cyprinus carpio L.) diets

Efficiency of the increase diets nutritional value by adding selenium as microelement into diets common carp fingerlings were studied using aquarium and cement tanks systems, which allowed feeding and continues measurement of growth parameters. In experiment (I) one hundred and fifty fingerlings each weighing approximately 7.5 ± 0.23 g was carried out, in aquarium and fed either normal diet (group A) or diets...

Author(s):  Magdy M. Gaber      

April 2009

Essential oils of Citrus aurantifolia from Cameroon and their antifungal activity against Phaeoramularia angolensis

Essential oils of three varieties of Citrus aurantifolia  (Bearss, Mexican and “Sans épines”) grown in Cameroon were extracted by hydrodistillation with yields of 0.29,  0.57 and 0.25% respectively. The chemical analysis was carried out by gas chromatography and gas chromatography coupled with mass spectrometry.  The three samples were found to be very rich...

Author(s): P.  M. Jazet Dongmo, L. N. Tatsadjieu, E. Tchinda Sonwa , J. Kuate, P. H. Amvam Zollo and C. Menut    

April 2009

The effect of single and mixed treatments of lead and cadmium on soil bioavailability and yield of Brassica napus irrigated with sewage effluent: A potential human risk

The effect of single and mixed treatments of Lead (Pb) and Cadmium (Cb) on soil bioavailability and uptake by Brassica napus was investigated in green house using soil from Golden Ridge Estate and wastewater from Pakamisa Sewage Treatment Plant, Gweru, Zimbabwe. Pb and Cd had significant effects on metal soil bioavailability and yield in single treatments. Soil bioavailable Pb in...

Author(s): Chimbira C. and Moyo D. Z.      

April 2009

Effectiveness of exclosures to control soil erosion and local community perception on soil erosion in Tigray, Ethiopia

The study investigated how effective exclosures are in the fight against soil erosion and how they are perceived as a means to control soil erosion by the local community (farmers and local experts). The universal soil loss equation (USLE) used to estimate potential soil erosion. Data on local community perception obtained from a survey of 62 farm households and five local experts. In-depth interview, group discussion...

Author(s): Wolde Mekuria, Edzo Veldkamp, Mitiku Haile, Kindeya Gebrehiwot, Bart Muys and Jan Nyssen    

April 2009

The effect of light on ROS-scavenging systems and lipid peroxidation under cold conditions in saffron (Crocus sativus L.)

Saffron is one of the most important crops cultivated in Iran. Because of low water demand and tolerance to winter cold as well as its high price and quality compared to that of other countries, Iranian saffron deserves closer attention. This experiment was conducted to study the effect of light under low temperature on the defense mechanisms of this plant. Corms of saffron were cultivated on the education and research...

Author(s): E. Esfandiari, S. S. Alavi-Kia, A. Bahmani and M. A. Aazami      

April 2009

A practical approach to electromotor fault diagnosis of Imam Khomaynei silo by vibration condition monitoring

Practical experience has shown that vibration technique in a machine condition monitoring program provides useful reliable information, bringing significant cost benefits to industry. The objective of this research was to investigate the correlation between vibration analysis and electromotor fault diagnosis. This was achieved by vibration analysis of an electromotor in Imam Khomaynei silo. The vibration analysis was...

Author(s): Hojat Ahmadi and Kaveh Mollazade      

April 2009

Effects of Turkish forest management philosophy and applications on forest ecosystem structure and functions in Northeast Turkey: A case study in Saçinka Forest Management Planning Unit

Nowadays, Turkish forest management philosophy has changed from timber management to ecosystem-based multiple-use forest planning (EBMUFM) with the principles of “sustainable forest management” criteria and indicators drafted in a few national and international agreements. This study analyzed the temporal changes in forest ecosystem structure and a few forest values such as tree species, distribution of age...

Author(s): Hacı Ahmet YolasiÄŸmaz and Sedat KeleÅŸ    

April 2009

Cloning and analysis of glyceraldehyde-3-phosphate dehydrogenase gene from Cordyceps militaris

A gene encoding a glyceraldehyde-3-phosphate dehydrogenase (GPD) gene was isolated from Cordyceps militaris using degenerate PCR and Thermal Asymmetric Interlaced PCR (TAIL-PCR) technology. Analysis of 4493 bp segments (Cmgpd) revealed the cloned gene contains a 2515 bp 5’ upstream region, a 1296 bp coding region and a 682 bp 3’ downstream region. The coding region contains a 279 bp intron. After...

Author(s): Zhenhua Gong, Ying Su, Lei Huang, Juan Lin, Kexuan Tang and Xuanwei Zhou    

April 2009

Farmers training programme of Ethiopian Institute of Agricultural Research: An appraisal

A large number of high yielding crop varieties, management practices, and other technologies have been generated by Holetta, Debre Zeit and Melkassa Research Centres. While the core functions of Ethiopian Institute of Agricultural Research (EIAR) are technology supply; popularization; national coordination and capacity building and policy development; the research and extension division of EIAR is responsible for...

Author(s): Tsion Tesfaye, Ranjan S. Karippai and Teklu Tesfaye