(2001) estimated the effects of a variety of subsidy schemes on the adoption of conservation tillage, demonstrating that a subsidy could lead to the sequestration of more than 2 Mt C yearly for a period of many years in Iowa alone. [...] The purpose of this study is to provide an in-depth review of the economic case for carbon sequestration through no-tillage cultivation techniques.1 Compared to forestry where researchers have estimated costs of sequestering carbon, direct estimates of the cost of carbon uptake in agricultural systems is lacking. [...] While individual studies provide estimates of the relationship between variables at a given point under a limited set of circumstances, MRA seeks to move from the results of individual studies to a more general description of the relationships between the variables (Curtis and Wang, 1998; Smith and Kaoru, 1990). [...] Aside from the regional indicators and the wheat dummy mentioned above, our meta- regression model for net returns includes the following additional explanatory variables: a general intercept term, a dummy for CT, interaction terms of tillage with each of the regional indicators and with “wheat”, and the number of years after 1973 that the study was performed.3 The last variable illustrates the ca. [...] Therefore, the discussion of model specification and error composition in the previous section extends in straightforward fashion to the specification of the carbon meta-regression.
Authors
- Pages
- 45
- Published in
- Canada
