About Us | Help Videos | Contact Us | Subscriptions
 

Abstract

 

This article in SSSAJ

  1. Vol. 51 No. 2, p. 410-415
     
    Received: Feb 10, 1986
    Published: Mar, 1987


 View
 Download
 Alerts
 Permissions
 Share

doi:10.2136/sssaj1987.03615995005100020028x

Effect of Tillage System on Runoff Losses of Surface-applied Pesticides1

  1. T. J. Sauer and
  2. T. C. Daniel2

Abstract

Abstract

Four tillage systems (conventional, chisel, ridge-plant, and no-till) in continuous corn (Zea mays L.) were compared with respect to surface runoff losses of atrazine (2-chloro-4-ethyl-amino-6-isopropylamino-s-triazine), alachlor [2-chloro-2′6′-diethyl-N(methoxymethyl) acetanilide] and chlorpyrifos [O,O-diethyl-O-(3,5,6-trichloro-2-pyridyl) phosphorothioate]. A modified Purdue sprinkling infiltrometer was used to apply simulated rainfalls of 136 and 73 mm during the 1983 and 1984 growing seasons to 1.35-m2 test areas on a Griswold silt loam (Typic Argiudoll). Conservation tillage (CT) systems (chisel, ridge-plant, and no-till) reduced both runoff and soil loss; however, pesticide concentrations in runoff water and sediment for these systems were at times greater than for the conventional (moldboard plow) system. Reduced runoff volumes and erosion with CT systems offset higher pesticide concentrations resulting in few significant tillage treatment differences with respect to total pesticide loss. Maximum loss of active ingredient averaged over all tillage systems was 5.8, 4.0, and 0.2% for atrazine, alachlor, and chlorpyrifos, respectively, when high-intensity simulated rainfall was applied within 7 d of pesticide application.

  Please view the pdf by using the Full Text (PDF) link under 'View' to the left.

Copyright © . Soil Science Society of America