Assessment of the Condition of Agricultural Lands in Five Mid-Atlantic States

被引:0
作者
A. S. Hellkamp
S. R. Shafer
C. L. Campbell
J. M. Bay
D. A. Fiscus
G. R. Hess
B. F. McQuaid
M. J. Munster
G. L. Olson
S. L. Peck
K. N. Easterling
K. Sidik
M. B. Tooley
机构
[1] North Carolina State University,EMAP
[2] U.S. Dept. of Agriculture,Agricultural Lands Resource Group
[3] Agricultural Research Service,undefined
[4] U.S. Dept. of Agriculture,undefined
[5] Natural Resources Conservation Service,undefined
来源
Environmental Monitoring and Assessment | 1998年 / 51卷
关键词
Biomass; Microbial Biomass; Agricultural Land; Quality Index; Soil Quality;
D O I
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中图分类号
学科分类号
摘要
Indicators of the condition and sustainability of agricultural lands in five Mid-Atlantic states were measured in 1994. Indicators were selected to reflect crop productivity and land stewardship on annually harvested herbaceous crop (AHHC) land, which covers almost 10% of the land area in this region. Overall, condition of agricultural lands in the region is good. Crops generally yielded more than those grown in the 1980s, with a mean observed/expected yield index greater than 1. The mean soil quality index was slightly better than a "moderate" rating for crop growth. Almost 2/3 of the AHHC land is covered by crop rotation plans, with the remaining land mostly in hay fields. Insecticides were applied to less than 20% of AHHC land, and less than 20% of the land where pesticides were applied has high to moderately high potential for pesticides leaching into groundwater. However, integrated pest management (IPM) is practiced on less than 20% of AHHC land. Hay showed more efficient use of nitrogen than seed crops, and non-tilled sites, which are mostly hay, had more microbial biomass (suggesting more nutrient cycling) than tilled sites. This information could provide a baseline for a long-term monitoring program for agroecosystems in the region.
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页码:317 / 324
页数:7
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