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During the 1978 irrigation season, 14 ground water samples were collected in the Central Platte region of Nebraska, an area known to have high nitrate-nitrogen (NO3--N) levels, and analyzed for the presence of 13 pesticide residues. Atrazine levels ranged from 0.06 microgram/liter to 3.12 microgram/liter and were correlated to NO3--N concentrations with a coefficient of r = +0.55. Nitrate-nitrogen concentrations were measured as indicators of deep percolation from irrigated lands and ranged from 17.1 mg/liter to 34.3 mg/liter. Alachlor levels ranged from less than 0.01 microgram/liter to 0.71 microgram/liter. The amounts of 2,4-D were indeterminate because of experimental problems. Levels of the herbicides silvex and EPTC were below the limits of detectability. Levels of the organochlorine insecticides endrin, gamma-BHC (lindane), dieldrin, DDT and its primary metabolite DDE, heptachlor and its primary derivative heptachlor epoxide, and methoxychlor were all below the detectable limits of 0.005-0.010 microgram/liter.
R F Spalding, and
G A Junk, and
J J Richard
January 2005,
Ground water,
R F Spalding, and
G A Junk, and
J J Richard
May 2020,
The Science of the total environment,
R F Spalding, and
G A Junk, and
J J Richard
January 2003,
Journal of environmental quality,
R F Spalding, and
G A Junk, and
J J Richard
August 1981,
The Nebraska medical journal,
R F Spalding, and
G A Junk, and
J J Richard
January 1980,
The Nebraska medical journal,
R F Spalding, and
G A Junk, and
J J Richard
September 1998,
Chemosphere,
R F Spalding, and
G A Junk, and
J J Richard
January 1987,
Schriftenreihe des Vereins fur Wasser-, Boden- und Lufthygiene,
R F Spalding, and
G A Junk, and
J J Richard
January 1987,
Schriftenreihe des Vereins fur Wasser-, Boden- und Lufthygiene,
R F Spalding, and
G A Junk, and
J J Richard
January 1993,
The Nebraska medical journal,
R F Spalding, and
G A Junk, and
J J Richard
January 2005,
Ground water,
