|
|
|
|
|
| Oosthuizen, L.K.. |
| The purpose of the paper is to explain the process by which modernisation of the agricultural sector by introducing new production technology into the sector serves as driving force of general economic development, with the social rate of return on these investments being very high, while the benefits of the development will be widespread in the economy, and generally in favour of the poor. Furthermore policies are discussed with the aim of increasing productivity and per capita income of rural people in Southern Africa. |
| Tipo: Journal Article |
Palavras-chave: Agricultural and Food Policy; International Development. |
| Ano: 1998 |
URL: http://purl.umn.edu/54881 |
| |
|
|
| Grove, Bennie; Oosthuizen, L.K.. |
| Deficit irrigation and increasing irrigation application efficiency were analysed as water-utilisation strategies through chance-constrained linear programming (CCLP) to establish whether these strategies were economically advantageous and water conserving. Deficit irrigation was modelled through scaling functions in the CCLP model, and potential return flow was calculated from optimal water application efficiencies. Results showed that increasing water application efficiency may be economically beneficial; however, the illusion might be created that water was conserved, while potential return flow was reduced. Deficit irrigation conserves water because water consumption decreases more than potential return flow. Deficit irrigation was economically... |
| Tipo: Journal Article |
Palavras-chave: Resource /Energy Economics and Policy. |
| Ano: 1997 |
URL: http://purl.umn.edu/54716 |
| |
|
|
| Haile, B.O.; Grove, Bennie; Oosthuizen, L.K.. |
| The research was conducted for a representative 50 ha farm in the Onderberg region in Mpumalanga province, where farmers use a combination of centre-pivot, drip, and dragline systems of different sizes to grow sugarcane. The main intention was to establish a multi-period linear programming model capable of economically evaluating a farm expansion decision making process for farmers faced with investment decisions in alternative irrigation systems, taking in to account the available initial capital of the farm. A linear programming (LP) model was used to assign a mainline for a total of twelve irrigation system combinations based on the assumption that the farmer wishes to start with a 30 ha centre-pivot investment. Generalized Algebraic Modelling System... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Crop Production/Industries; Land Economics/Use; Research Methods/ Statistical Methods. |
| Ano: 2003 |
URL: http://purl.umn.edu/19081 |
| |
|
|
| Alemu, Zerihun Gudeta; Oosthuizen, L.K.; van Schalkwyk, Herman D.. |
| Agriculture in the Ethiopian economy has survived three major structural breaks, namely the 1974 change of policy in favour of a command-based economic system, the 1984 famine and the 1992 change of policy that introduced a market economy. A regression procedure was applied to analyze the effect of these breaks on the slope and intercept of agricultural GDP. In addition, statistical properties were studied to measure the degree of persistence of shocks in agricultural GDP. In the regression equation, only the 1984 famine was found to be significant. The non-significance of policy parameters in the regression equation could be associated with a lack of infrastructural facilities and the subsistence nature of Ethiopian agriculture. The study of the... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Political Economy; Productivity Analysis. |
| Ano: 2003 |
URL: http://purl.umn.edu/19089 |
| |
|
| |
|
|
| Haile, B.O.; Grove, Bennie; Oosthuizen, L.K.. |
| The research was conducted for a representative 50 ha farm in the Onderberg region in Mpumalanga province, where farmers use a combination of centre-pivot, drip, and dragline systems of different sizes to grow sugarcane. The main intention was to establish a multi-period linear programming model capable of economically evaluating a farm's expansion decision-making process for farmers faced with investment decisions in alternative irrigation systems, taking into account the available initial capital of the farm. A linear programming (LP) model was used to assign a mainline for a total of twelve irrigation system combinations based on the assumption that the farmer wishes to start with a 30 ha centre-pivot investment. The Generalized Algebraic Modelling... |
| Tipo: Journal Article |
Palavras-chave: Agricultural Finance. |
| Ano: 2005 |
URL: http://purl.umn.edu/31705 |
| |
|
|
| Grove, Bennie; Oosthuizen, L.K.. |
| Chance constrained mathematical programming was used to compare the effects of two different crop yield relationships on the economic cost to irrigation farmers while maintaining an instream flow requirement. Results showed that the Stewart-Hagan programming model underestimated the economic cost and overestimated potential return flows. Water policies based on this model will lead to the implementation of socially unacceptable water allocation policies that may even apply more pressure on stream flows. Meaningful water policies could only be advanced by a thorough understanding of the economic and hydrological consequences of alternative water allocation policies through the integration of economic and hydrological models at catchment level. |
| Tipo: Journal Article |
Palavras-chave: Crop Production/Industries; Environmental Economics and Policy. |
| Ano: 1998 |
URL: http://purl.umn.edu/54890 |
| |
|
|
|
