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Emergence of portable X-ray fluorescence (pXRF) systems presents new opportunities for rapid, low-cost plant analysis, both as a lab system and in situ system. Numerous studies have extolled the virtues of using pXRF for a wide range of plant applications, however, for many such applications, the...


Towett, Erick K.Shepherd, Keith D.Drake, B. Lee[Plant elemental composition and portable X-rayfluore scence (pXRF) spectroscopy:quantification under differentanalytical parameters]Plant elemental composition and portable X-rayfluore scence (pXRF) spectroscopy:quantification under differentanalytical parameters
Mwangi, E.[The struggle to understand: Elinor Ostrom and institutions for the governance of forests]The struggle to understand: Elinor Ostrom and institutions for the governance of forests

Genetic variation within and among 11 natural populations of Pterocarpus macrocarpus Kurz. from different forest habitats in Thailand was examined by starch gel electrophoresis of 18 loci coding for 11 enzymes. The species possesses a high level of isozyme variation. The percentage of polymorphic...


Liengsiri, C.Yeh, F.C.H.Boyle, T.J.B.[Isozyme analysis of a tropical forest tree, Pterocarpus macrocarpus Kurz]Isozyme analysis of a tropical forest tree, Pterocarpus macrocarpus Kurz
Parmentier, I.[The odd man out? Might climate explain the lower tree a-diversity of African rain forests relative to Amazonian rain forests?]The odd man out? Might climate explain the lower tree a-diversity of African rain forests relative to Amazonian rain forests?

This paper describes an application of multiple criteria analysis (MCA) in assessing criteria and indicators adapted for a particular forest management unit. The methods include: ranking, rating, and pairwise comparisons. These methods were used in a participatory decision-making environment wher...


Mendoza, G.A.Prabhu, R.[Development of a methodology for selecting criteria and indicators of sustainable forest management: a case study on participatory assessment]Development of a methodology for selecting criteria and indicators of sustainable forest management: a case study on participatory assessment

The literature on deforestation in Malawi points to a number of causes, including high population in relation to available land, poverty, market and policy failures, drought, and the activity of structural adjustment policies. Agricultural statistics from Malawi indicate substantial increases in ...


Mindle, I.J.Kowero, G.S.Ngugi, D.Luhanga, J.[Agricultural land expansion and deforestation in Malawi]Agricultural land expansion and deforestation in Malawi

Molecular-based characterization of open-pollinated varieties (OPVs) in maize is useful to define their unique profiles. A total of 58 SSR markers selected from a panel of 70 were used for genotyping three samples of 30, 50 and 100 plant bulks for each of 32 OPVs. The SSR markers detected a total...


Arafayne, G.Menkir, A.Adetimirin, V.O.Gedil, M.[Optimizing sample size for molecular characterization of open-pollinated maize (Zea mays L.) varieties using simple sequence repeat markers]Optimizing sample size for molecular characterization of open-pollinated maize (Zea mays L.) varieties using simple sequence repeat markers

We review trends and advances in three specific areas of theoretical plant epidemiology: models of temporal and spatial dynamics of disease, the synergism of epidemiology and population genetics, and progress in statistical epidemiology. Recent analytical modelling of disease dynamics has focused...


Scherm, H.Ngugi, H.Ojiambo, P.[Trends in theoretical plant epidemiology]Trends in theoretical plant epidemiology

Agricultural productivity in Africa from 1971 to 2000 is examined using the recently developed metafrontier function technique, for the purpose of studying differences in efficiency and technology gap across different regions of the continent. The results support the view that technology gap play...


Nkamleu, G.B.Nyemeck, J.Sanogo, D.[Metafrontier analysis of technology gap and productivity difference in African agriculture]Metafrontier analysis of technology gap and productivity difference in African agriculture

A bean golden mosaic geminiviral isolate from Goiania, Goiás, Brazil (BGMV-BZ), was determined to be transmitted by whiteflies and induced golden mosaic symptoms and diagnostic geminiviral inclusion bodies and ultrastructural abnormalities in infected bean leaves. In contrast to BGMV isolates fro...


Gilbertson, R.L.Hidayat, SHMartínez, R.T.Leong, SAFaria, J.C. deMorales, FMaxwell, D.P.[Differentiation of bean-infecting geminiviruses by nucleic acid hybridization probes and aspects of bean golden mosaic in Brazil]Differentiation of bean-infecting geminiviruses by nucleic acid hybridization probes and aspects of bean golden mosaic in Brazil

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