English, Article edition: Tanzania's soil wealth BREKKE, KJELL ARNE; IVERSEN, VEGARD; AUNE, JENS B.

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Physical Description
  • article
Language
  • English

Edition details

Title
  • Tanzania's soil wealth
Author
  • BREKKE, KJELL ARNE
  • IVERSEN, VEGARD
  • AUNE, JENS B.
Physical Description
  • article
Notes
  • This paper adopts soil scientific models of soil productivity and degradation in Tanzania into an intertemporal optimisation framework. The farmers choose labour input, capital investment and fertiliser input to maximise soil wealth, i.e., the present value of soil rent. First we focus exclusively on soil mining, considering the nutrient stocks as determinants of land productivity. Next, we focus on soil erosion, and include rooting depth as determinant of land productivity. We compute the soil wealth under the assumption that the opportunity cost of labour is equal to current wages, or alternatively equal to zero. Our estimates suggest that the potential gains from change in agricultural management are considerable. Moreover, the shadow price on root depth and hence the returns to land conservation investments are highly sensitive to our labour market assumptions. We also find that the value of the eroded soil amounts to 12 17 per cent of the value of Hicksian income, and the savings required to maintain consumption amounts to 13 29 per cent of the contribution to GDP.
  • RePEc:cup:endeec:v:4:y:1999:i:03:p:333-356_00
Language
  • English
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