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Hectare

Known as: ha 
A metric unit of area equal to 10E4 square meters or to 100 ares. A hectare is a non-SI unit currently accepted for use with SI. One hundred hectares… Expand
National Institutes of Health

Papers overview

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Review
2018
Review
2018
Significance Overuse of agricultural chemicals has resulted in enormous damages to environmental quality and human health in… Expand
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Highly Cited
2013
Highly Cited
2013
Worldwide demand for crops is increasing rapidly due to global population growth, increased biofuel production, and changing… Expand
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Highly Cited
2013
Highly Cited
2013
China is experiencing intense air pollution caused in large part by anthropogenic emissions of reactive nitrogen. These emissions… Expand
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Highly Cited
2009
Highly Cited
2009
Thirty microalgal strains were screened in the laboratory for their biomass productivity and lipid content. Four strains (two… Expand
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Highly Cited
2002
Highly Cited
2002
Abstract This essay clarifies the concept of dialogue in public relations. As public relations theory and research move toward a… Expand
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Highly Cited
2002
Highly Cited
2002
Tropical peatlands are one of the largest near-surface reserves of terrestrial organic carbon, and hence their stability has… Expand
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Highly Cited
2001
Highly Cited
2001
Wave propagation in a double negative (DNG) medium, i.e., a medium having negative permittivity and negative permeability, is… Expand
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Highly Cited
2001
Highly Cited
2001
The manner in which terrestrial ecosystems are regulated is controversial. The “top-down” school holds that predators limit… Expand
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Highly Cited
2001
Highly Cited
2001
The location and mechanisms responsible for the carbon sink in northern mid-latitude lands are uncertain. Here, we used an… Expand
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Highly Cited
1976
Highly Cited
1976
A telephone private switching equipment of the space-division operated type comprises a matrix of electronic switch cross-points… Expand
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