Search Results - "van Rooyen, André F."

Exploring the factors causing the poor performance of most irrigation schemes in post-independence sub-Saharan Africa by Bjornlund, Vibeke, Bjornlund, Henning, van Rooyen, André F.

“…This article explores the factors causing the current poor performance of most government irrigation schemes in sub-Saharan Africa. The literature review finds…”
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The importance of learning processes in transitioning small-scale irrigation schemes by Parry, Karen, van Rooyen, André F., Bjornlund, Henning, Kissoly, Luitfred, Moyo, Martin, de Sousa, Wilson

“…Many small-scale irrigation schemes are dysfunctional, and learning, innovation and evaluation are required to facilitate sustainable transitions. Using…”
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Identifying leverage points to transition dysfunctional irrigation schemes towards complex adaptive systems by van Rooyen, André F., Moyo, Martin, Bjornlund, Henning, Dube, Thabani, Parry, Karen, Stirzaker, Richard

“…This article explores the value of Ostrom's socio-ecological systems framework and Meadows's leverage point hierarchy, as structured diagnostics, to define…”
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Theory and application of Agricultural Innovation Platforms for improved irrigation scheme management in Southern Africa by van Rooyen, André F., Ramshaw, Peter, Moyo, Martin, Stirzaker, Richard, Bjornlund, Henning

“…Many small-scale irrigation systems are characterized by low yields and deteriorating infrastructure. Interventions often erroneously focus on increasing…”
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Beyond fertilizer for closing yield gaps in sub-Saharan Africa by Van Rooyen, André F, Bjornlund, Henning, Pittock, Jamie

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Why agricultural production in sub-Saharan Africa remains low compared to the rest of the world - a historical perspective by Bjornlund, Vibeke, Bjornlund, Henning, Van Rooyen, Andre F.

“…Agricultural production in sub-Saharan Africa has, in recent times, remained lower than the rest of the world. Many attribute this to factors inherent to…”
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Assessing rangeland condition in the Kalahari Duneveld through local ecological knowledge of livestock farmers and remotely sensed data by Kong, Taryn M., Marsh, Stuart E., van Rooyen, Andre F., Kellner, Klaus, Orr, Barron J.

“…Monitoring of land degradation in remote rangelands, such as the Kalahari Duneveld, presents significant logistical challenges because of the need for…”
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Production decisions and food security outcomes of smallholder’s livestock market participation: empirical evidence from Zimbabwe by Melesse, Mequanint B., Tirra, Amos Nyangira, Homann-Kee Tui, Sabine, Van Rooyen, Andre F., Hauser, Michael

“…Smallholder market participation is an important pathway to improving the productivity and livelihoods of farm households. Despite several studies documenting…”
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Combating desertification in the southern Kalahari: connecting science with community action in South Africa by van Rooyen, Andre F.

“…Recent political changes in South Africa have required a new approach to project management, one that includes community involvement at all levels of project…”
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Assessing the potential of dual-purpose maize in southern Africa: A multi-level approach by Homann-Kee Tui, Sabine, Blümmel, Michael, Valbuena, Diego, Chirima, Albert, Masikati, Patricia, van Rooyen, Andre F., Kassie, Girma T.

“…•Spatial stratification combined with farming systems analysis better assesses the demand of and potential for dual-purpose maize.•There is potential for…”
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Detecting vegetation change in the southern Kalahari using Landsat TM data by Palmer, Anthony R., van Rooyen, Andre F.

“…Using Landsat TM data we explored the magnitude and direction of change in reflectance from two study areas in the southern Kalahari Desert from 1989 to 1994…”
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