HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Troiano, J. Articles by Huston, J. Search for Related Content PubMed Articles by Troiano, J. Articles by Huston, J. Agricola Articles by Troiano, J. Articles by Huston, J.

Influence of Amount and Method of Irrigation Water Application on Leaching of Atrazine

Environmental Hazards Assessment Program, California Dep. of Food and Agric., 1220 ‘N’ Street, Room A-149, Sacramento, CA 95814;

C. Krauter and J. Brownell

Plant Sciences and Mechanical Agriculture Dept., California State Univ. Fresno, CA 93740;

J. Huston

Dep. of Agronomy, Bradfield Hall, Cornell Univ., Ithaca, NY 14843.

^* Corresponding author.

ABSTRACT

A study was conducted to relate leaching of a herbicide, atrazine [6-chloro-N-ethyl-N'-(1-methylethyl)-1,3,5-triazine-2,4,-diamine], and inorganic water tracers, Br^– and Cl^–, to the amount of deep-percolating water produced from irrigation. Soil at the site was classified as a Dehli Loamy Sand (Mixed, Thermic, Tepic Xeropsamment) which was an unstructured sandy soil that was low in organic C content, conditions conducive to solute leaching. The relationship between depth of solute movement and amount of deep-percolating water was measured in sprinkler, basin, and furrow irrigation methods. Soil distribution of inorganic tracers indicated that graded levels of added water treatments, which were based on reference evapotranspiration, produced corresponding increases in the depth of percolated water. Atrazine's soil distribution indicated greater downward movement in response to increases in amount of deep-percolating water. Magnitude of leaching differed between irrigation methods and increased in the order: sprinkler < basin < furrow. Simulations using the LEACHM model provided a physically based explanation for the differences in water movement between sprinkler and basin methods. The total amount of applied water was similar at each level of percolation but sprinkler irrigations were more frequent, resulting in more evaporation and, consequently, less water available for deep percolation. Both amount and method of water application are important factors that determine pesticide movement and that, in irrigated agriculture, must be considered as integral components of pesticide management.

The mention of commercial products, their sources, or use in connection with material reported herein is not to be construed as either an actual or implied endorsement of such produce.

Received for publication April 1, 1992.

This article has been cited by other articles:

				R. F. Spalding, D. G. Watts, D. D. Snow, D. A. Cassada, M. E. Exner, and J. S. Schepers Herbicide Loading to Shallow Ground Water beneath Nebraska's Management Systems Evaluation Area J. Environ. Qual., January 1, 2003; 32(1): 84 - 91. [Abstract] [Full Text] [PDF]

				J. Troiano, D. Weaver, J. Marade, F. Spurlock, M. Pepple, C. Nordmark, and D. Bartkowiak Summary of Well Water Sampling in California to Detect Pesticide Residues Resulting from Nonpoint-Source Applications J. Environ. Qual., March 1, 2001; 30(2): 448 - 459. [Abstract] [Full Text] [PDF]