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The top documents tagged [years soils]
First International Symposium on Soil Water Measurement Using Capacitance and Impedance November 6-8, 2002 Beltsville, Maryland, USA Home
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Average Composition of the Troposphere Gas Name Formula Abundance (%) Residence time (approx) Nitrogen N 2 78.08%42,000,000 years Oxygen O 2 20.95%5,000
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