Results 181 to 190 of about 412,042 (359)

A Systems Thinking Approach to Mitigating Xenophobia in South Africa for Socio‐Economic Development

open access: yesSystems Research and Behavioral Science, EarlyView.
ABSTRACT Economic growth in South Africa has led to significant influx of migrants, especially from the African continent, searching for greener pastures. The influx of migrants in South Africa has given rise to competition for scarce resources between locals and migrants.
Y. S. Nyam, O. Kunguma, O. T. Selelo
wiley   +1 more source

Effects of Cash Crop Production on Food Crop Productivity in Zimbabwe: Synergies or Trade-offs? [PDF]

open access: yes
This paper studies the dynamics between cash cropping and food crop productivity in Gokwe North District in Zimbabwe, a major cotton producing area. The main research issues were: (1) to identify the determinants of commercialized crop production at the ...
Govereh, Jones, Jayne, Thomas S.
core   +1 more source

A densely sampled nuclear phylogenomic analysis of the coryphoid palms (Arecaceae: Coryphoideae)

open access: yesTAXON, EarlyView.
Abstract The palm family (Arecaceae) has a rich history of phylogenetic research, including several recent phylogenomic studies. However, densely sampled phylogenomic datasets for larger palm clades – such as subfamilies – are still few in number. We used target sequence capture to obtain data for 971 nuclear genes across 421 (ca.
Oscar Wrisberg   +12 more
wiley   +1 more source

Two choice African Sansevierias: S. hargeisana and S. hallii [PDF]

open access: yes, 2018
Sansevieria hargeisana (from Somalia) and S. hallii (from Zimbabwe and probably elsewhere in SE Africa) are described and compared. Both are relatively slow growing and are therefore choice collectors' items.
Walker, Colin C.
core  

Dismantling the genus Tarenna (Rubiaceae: Pavetteae) in Africa and Madagascar, with the description of three new genera

open access: yesTAXON, EarlyView.
Abstract As presently circumscribed, the Paleotropical genus Tarenna, belonging to the tribe Pavetteae (Rubiaceae), comprises about 200 species and has its centres of diversity in tropical Asia and Africa. Previous molecular phylogenetic studies of the tribe revealed the polyphyly of Tarenna, suggesting that the genus needs to be recircumscribed ...
Petra De Block   +3 more
wiley   +1 more source

Improving water utilization from a catchment perspective [PDF]

open access: yes
Water management / Water scarcity / Water use efficiency / Catchment areas / Calibrations / Hydrology / Models / River basins / Participatory management / Water balance / Case studies / Asia / Africa / South Africa ...
Batchelor, C.   +3 more
core  

A novel circumscription and classification for Neurolaeneae (Asteraceae)

open access: yesTAXON, EarlyView.
Abstract Neurolaeneae (Asteraceae) have a complicated taxonomic history. The tribe was described in 1927, but subsequently disregarded in 1977, and later reinstated as a tribe following a large‐scale phylogenetic analysis of Asteraceae in 2002. To date, this tribe has remained poorly studied and it has never been the subject of a comprehensive ...
Vinicius R. Bueno   +4 more
wiley   +1 more source

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