Conservation tillage and input use

被引:33
作者
Uri, ND
机构
[1] ERS/NRED/PMTB, U.S. Department of Agriculture, Washington, DC 2005, 1301 New York Avenue, NW
来源
ENVIRONMENTAL GEOLOGY | 1997年 / 29卷 / 3-4期
关键词
agricultural production; conservation tillage; pesticide use; tillage systems;
D O I
10.1007/s002540050117
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
There continues to be a question as to the overall effectiveness of conservation tillage practices in reducing the impact of agricultural production on the environment. While it is generally recognized that water runoff and soil erosion will decline further, as tillage and mulch tillage systems are not used more extensively on cropland, what will happen to pesticide and fertilizer use remains uncertain. To gain some insight into this, the conservation tillage adoption decision is modelled. On the assumption that the decision to adopt conservation tillage is a two-step procedure, the first decision is whether or not to adopt a conservation tillage production system and the second concerns the extent to which conservation tillage should be used-appropriate models of the Cragg and Heckman (dominance) type are estimated. Based on farm-level data on corn production in the United States for 1987, the profile of a farm on which conservation tillage was adopted is that the cropland had above-average slope and experienced above-average rainfall, the farm was a cash grain enterprise, and it had an above-average expenditure on pesticides and a below-average expenditure on fuel and custom pesticide applications. Additionally, for a farm adopting a no-tillage production practice, an above-average expenditure was made on fertilizer.
引用
收藏
页码:188 / 201
页数:14
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