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Euphorbia heterophylla Linn., Euphorbia hirta Linn., Euphorbia hyssopifolia Linn. and Euphorbia prostrata Linn. are four noxious, yet economically important weeds, useful as phytomedicine in some parts of the world and also in Nigeria. Studies were carried out on their reproductive biology with a view to understanding the mode of their spread. Parameters investigated include number of days to seedling emergence, germination percentage, number of days to flowering, period to anthesis, pollinators, pollen viability, pollen size, floral structure, fruits type, seeds type, average number of fruit per plant, average number of seeds per plant and mode of seed dispersal. Results obtained showed that the seedlings of the four Euphorbia species studied emerged within 3 to 5 days; numbers of days to 50% flowering took 44 to 58 days; while flowering and fruiting continued throughout the remaining part of the year; thus exhibited r-strategy, expending more time and allocation of resources on their reproductive phases than their vegetative phases. Also differences existed in their stigma shape, perianth colour, perianth texture, pollen sizes, pollen viability as well as ripened colour of seed which were all significant characters that could be useful in delimiting the species. Furthermore, the study revealed that the four species were essentially insect pollinated and their seeds dispersed by means of explosive mechanism usually characteristic of their schizocarpic fruits. This ability as well as their tendency to exhibit r-strategy could probably account for their ability to spread and invade cultivated fields, waste lands and roadsides. ABSTRACT 001

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PurposeAlthough scientific research community has shown considerable interest in identifying critical success factors (CSFs) for public-private partnership (PPP) projects, yet effort at assessing and compare CSFs within similar PPP infrastructure projects received scant attention. The purpose of this study is to identify, assess, and compare the CSFs in PPP transport infrastructure projects.
Design/methodology/approach
The study adopted literature review and three PPP case studies including structured interviews and review of documentary reports in each case study. The outcome of literature review provided a total list of 26 identified success factors, which was used to design a case study protocol using Failure Mode and Effect Analysis (FMEA) technique. FMEA was conducted on each 26 identified success factor to assess their criticality in the three PPP case studies.
Findings
The results of FMEA revealed a total of 10 CSFs in the concession of the road; four CSFs in the concession of the airport; and eight CSFs in the concession of the seaport. Also, the cross-case analysis showed the three prevalent CSFs, this includes government involvement by providing guarantees, political support, and project economic viability.
Practical implications
The study findings including lessons learnt in each case study would positively influence policy development towards PPP transport infrastructure projects and the manner in which partners (i.e. public and private sector) go about the development of PPP transport projects.
Originality/value
This research would help PPP stakeholders to focus their attention and priorities in managing the identified CSFs in achieving long-term success in PPP transport infrastructure projects implementation.

Healthcare like shelter, clothing and food constitutes an important basic need for the survival of mankind. This explains why every citizen must enjoy quality health and protection from disease and proper medi-care for survival. Health therefore is a basic element of every citizen in a country. This paper examines the socio-economic characteristics of residents and their utilization of available healthcare facilities in Owo local government area of Ondo State. The data utilized in the paper draws on systematic sampling of 368 health consumers in the study area. Findings revealed that socio-economic characteristics play a significant role in determining the frequency of visits to healthcare facilities, this is substantiated with the chi-square test result that revealed a significant relationship between marital status and frequency of visits to healthcare facilities with χ² = 29.175 and significant at p = 0.004 level, age and frequency of visits (χ² = 15.016 and significant at p = 0.059 levels), as well as income of households and the frequency of visits to healthcare facilities with χ² = 20.961 and significant at p = 0.007 levels. The paper therefore concluded that efforts should be put in place to improve the socio-economic status of individuals through multi-sectoral development activities such as micro-credit facilities, empowerment/training and provision of employment opportunities which is believed will invariably improve their access and utilization of healthcare facilities.

Maintaining adequate soil fertility and health is a challenge in dryland organic wheat systems. This research examines the short-term impact of a one-time addition of compost on the soil health in a rainfed dryland organic winter-wheat (Triticum aestivum L.) fallow system. Field plot experiments were established in 2015 in a semiarid dryland organic wheat field in Snowville, Utah with the following treatments: control (C), compost at 12.5 Mg/ha dry weight (CM1), 25 Mg/ha (CM2), 50 Mg/ha (CM3), positive control 25 Mg compost + 40 lb N feather meal (PC), and 2 Mg chicken manure (CMU). Soil samples were taken in May 2016 at a depth of 0-10 cm from the plots in the wheat phase of the rotation. Indicators of soil health and fertility were determined such as microbial biomass C, enzyme activities involved in the cycling of C and P, total organic carbon and nitrogen determined.The application of compost appeared to promote microbial activities with the greatest effect at CM3. Acid and alkaline phosphatase enzyme activities significantly increased by as much as 61 % and 47 % respectively. Microbial biomass carbon, dehydrogenase enzyme activity, readily mineralizable carbon, total organic carbon and total nitrogen were highest at CM3.
Based on our findings so far, compost addition stimulated soil microbial activities and boosted organic C and N in the surface layers of the soil. Outcomes of this study will contribute to the overall goal of enhancing productivity and sustainability of rainfed dryland organic winter-wheat.