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: 4 April 2010; 5(7)

April 2010

Coastal landscapes and conservation issues: Antalya-Phaselis

Phaselis is an antique settlement situated on the Mediterranean coast of Turkey on the way to Antalya coastal highway, 35 km from Antalya. It was one of the most important antique cities of Pamphylia founded over a peninsula that narrowed into bays to the north and south. Phaselis was a city of natural harbors founded by the colonists from Rhodes in the 6th century B.C. It had three harbors one on the north, one on...

Author(s): Elmas Erdogan and Nazan Kuter

April 2010

Over seventy years of a viral disease of cocoa in Ghana: From researchers’ perspective

Virus diseases have plagued cocoa (Theobroma cacao) production in West Africa for over seven decades. Principal among them is that caused by the cocoa swollen shoot virus (CSSV), which is endemic in Togo, Ghana and Nigeria, and more recently Cote d’Ivoire. The incidence of the disease in Ghana has led to the launch of the costliest and an over ambitious eradication control programme in the world. This review...

Author(s): H. Dzahini-Obiatey, Owusu Domfeh and F. M. Amoah

April 2010

Demand for inputs in tomato and cucumber: The case of Uzundere

The aim of this study was to determine the gross margins of cucumbers and tomatos in greenhouses, price and cross elasticities and Morishima technical substitution elasticity of the inputs such as labor, seedling, fertilizers and drugs, which play a key role in the production of these products in Uzundere District of Erzurum Province in Turkey. Model solutions, which were created by using translog cost function were...

Author(s): Atilla Keskin, Esra Kadanali and  Vedat DaÄŸdemir

April 2010

Energy use pattern and economic analyses of pomegranate cultivation in Turkey

The objective of this study was; to determine the energy usage, to find the output‑input energy ratio and their relationships, and to analyse the economic variables in pomegranate cultivation in Turkey. Antalya region, which is one of the most important native lands of the pomegranate cultivation and agricultural centre in Turkey, was selected as the research area. The energy use pattern and economic item values were...

Author(s): Murad Canakci

April 2010

Effectiveness of training offered by the Ethiopian Institute of Agricultural Research to farmers: The case of Holetta, Melkassa and Debre Zeit Agricultural Research Centres

The research and extension divisions of the Ethiopian Institute of Agricultural Research are responsible for transfer of technologies. There is a need to improve agricultural extension activities through training. Therefore, the objective of this study was to analyze the effectiveness of farmers’ training in improving their knowledge and attitudes and to identify the factors influencing effectiveness of training...

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

April 2010

Effects of extension services of firms offering contract farming: A case study of small scale maize farmers in the Limpopo Province of South Africa

A probit regression model was employed in this study to investigate the effect of private extension services on contract farming participation by small scale maize farmers in rural areas of the Limpopo Province of South Africa. The study suggested that participation in contract farming was positively influenced by the quality of extension services provided, follow-up visits and type of enterprise. Stock of farm input...

Author(s): F. D. K. Anim

April 2010

Effect of inter-row spacing and plant population on weed dynamics and maize (Zea mays L.) yield at Zanyokwe Irrigation Scheme, Eastern Cape, South Africa

A study was conducted to determine the effects of inter-row spacing (45 and 90 cm) and plant population (40000 and 60000 plants ha-1) on weed biomass and the yield of both green and grain materials of maize plants. The experiment was set up as 2 × 2 factorial in a randomised complete block design with three replications. Plant population had no significant effects and interaction among factors was not significant...

Author(s): M. Fanadzo, C. Chiduza and P. N. S. Mnkeni

April 2010

Comparative performance of direct seeding and transplanting green maize under farmer management in small scale irrigation: A case study of Zanyokwe, Eastern Cape, South Africa

An on-farm experiment was conducted at Zanyokwe irrigation scheme (ZIS) in the Eastern Cape Province of South Africa (SA) to evaluate comparative performance of direct seeded and transplanted green maize under farmer management. Results indicated that the mean labour requirements for establishment were 212 h ha-1 with transplanting and 1.9 h ha-1 with direct seeding. Crop stand significantly increased...

Author(s): M. Fanadzo, C. Chiduza and P. N. S. Mnkeni

April 2010

Emitter clogging and effects on drip irrigation systems performances

Emitter clogging is one of the most important factors that affect the performances on drip irrigation systems. Emitter clogging, which is formed in a short time due to irrigation systems’ running under an inadequate pressure or owing to water quality, not only negatively influences uniformity of water distribution but also causes inadequate irrigation. In this survey, the clogging level determination of the...

Author(s): Muharrem Yetis Yavuz, Kursad Demırel, Okan Erken, Erdem Bahar and Merve Devecıler

April 2010

Stability and adaptability of commercial cotton cultivars (Gossypium hirsutum L. race latifolium H.) in Mozambique

Cotton, which is also known as ‘white gold’, is an important crop in many developing countries. The crop yield is dependent on the environment in which it is grown. One of the major challenges for cultivar recommendation is the genotype x environment interaction when the performance ranking of genotypes over environments is not constant. The identification of cultivars with high adaptability and...

Author(s): Manuel Pedro Maleia, Pedro Soares Vidigal Filho, Marcus Vinícius Kvitschal and Maria Celeste Gonçalves-Vidigal

April 2010

Long distance transport of assimilates is shown to exist in soybean plants

Effect of source-sink distance on soybean yield was studied. Our hypothesis was that soybean can redistribute assimilates from lower leaves to young pods formed at youngest part of stems across the main stem to maintain yield. We artificially created two, four, six, eight, and ten-nodes of source-sink distances in soybean plant. A reduction in the seed yield of remained sink occurred with the increase in distance from...

Author(s): Bing Liu,, Xiao-Bing Liu, Cheng Wang, Yan-Sheng Li, Jian Jin and S. J. Herbert

April 2010

Field evaluation of soybean cultivars for resistance to whitefly (Bemisia tabaci Genn.) infestations

Whitefly is one of the major yield reducing insect pests of soybean in the Mediterranean region. This study was conducted to screen soybean cultivars, taken from germplasm centers and private seed companies (USA), against the whitefly in the Mediterranean region after wheat harvest in between 1976 and 2005. No artificial infestation was made since whiteflies were very abundant. The whitefly observation was made in...

Author(s): Leyla Gulluoglu, Halis Arioglu and Cemal Kurt

April 2010

Isolation and characterization of microsatellite repeats in Marama bean (Tylosema esculentum)

Marama bean [Tylosema esculentum (Burchell) Schreiber] occurs naturally in arid and dry parts of Southern Africa, including Botswana, Namibia and South Africa. Due to the high nutrient value of the seeds and tubers, rich in protein, oil and starch, it is a potential crop for arid areas where few conventional crops can survive. The objectives of this study were to design microsatellite primers based on...

Author(s): M. Takundwa, P. M. Chimwamurombe, K. Kunert and C. A. Cullis

April 2010

A comparative study of the bionomics of Clavigralla tomentosicollis Stäl (Hemiptera: Coreidae) on three varieties of cowpea (Vigna unguiculata (L.) Walp)

Clavigralla tomentosicollis Stäl, is a notorious pod-sucking bug of cowpea in tropical agro - ecosystems. The improvement of cowpea grain yields by screening of cowpea lines for resistance to pod-sucking bugs has not been undertaken in South Africa. In this study, C. tomentosicollis populations were reared on fresh pods of two local cowpea varieties (Glenda and Bechuana White) and one improved...

Author(s): William Diymba Dzemo, Augustine Suh Niba Joseph Asiwe

April 2010

Germplasm evaluation and enhancement for the development of cowpea (Vigna unguiculata (L.) Walp dual-purpose F2 genotypes

Cowpea is an important grain legume as well as fodder crop, especially in the dry regions of South Africa. The production of this crop has been below average because of low genetic variation and cultivation of poor-yielding varieties which have not been improved. The potentials of cowpea F2 generation arising from crosses made from 55 exotic parental lines, introduced into South Africa were determined....

Author(s): A. I. Moalafi, J. A. N. Asiwe and S. M. Funnah

April 2010

Response of maize (Zea mays L.) to different rates of wood-ash application in acid ultisol in Southeast Nigeria

Maize (Zea mays L.) is an important cereal crop in southeast Nigeria. Yet few data exists on the effect of soil acidity on its production. A field study was conducted in 2007 and 2008 cropping seasons to determine the effect of different rates of wood ash on soil properties and maize grain yield. Results of the study showed significant difference (p < 0.05) in soil pH, ECEC (Cmolkg-1), OM%, total N%, aggregate...

Author(s): C. N. Mbah, J. N. Nwite, C. Njoku and I. A. Nweke

April 2010

Effect of salt stress on growth and ion distribution and accumulation in shoot and root of maize plant

In this study, effect of applied NaCl on shoot and root growth and distribution and accumulation of Na, Cl, N, P, K, Ca, Fe, Zn and Mn in shoot and root of the maize plant (Zea mays L. cv: RX 947) was investigated. The experiment was arranged in a Completely Randomized Design under the greenhouse condition. Sodium chloride was applied at the rates of 0, 25, 50, 75 and 100 mM NaCl. Shoot and root growth of the maize...

Author(s): Murat Ali Turan, Abdelkarim Hassan Awad Elkarim, Nilgün Taban and Suleyman Taban