About Us | Help Videos | Contact Us | Subscriptions
 

Abstract

 

This article in SSSAJ

  1. Vol. 50 No. 6, p. 1471-1478
     
    Received: Sept 27, 1985


 View
 Download
 Alerts
 Permissions
Request Permissions
 Share

doi:10.2136/sssaj1986.03615995005000060019x

Effect of Terrazole on Nitrogen Transformations and Movement in Irrigated Corn1

  1. R. L. Mikkelsen,
  2. W. M. Jarrell,
  3. J. Letey and
  4. S. Whaley2

Abstract

Abstract

A field study was conducted on two sandy loam soils to determine the effect of Terrazole nitrification inhibitor (5-ethoxy-3-[trichloromethyl]-1,2,4-thiadiazole) on N movement and transformations. Sweet corn (Zea mays L.) was fertilized with (NH4)2SO4 twice during the growing season for a total application of 250 kg N ha−1. The N applied to one-half of the fertilized treatments was coated with Terrazole. Three levels of irrigation were established for each field. The treatments on Arlington (Typic Durixeralfs) sandy loam received 55.9, 69.0, and 78.1 cm infiltrated water. The Hanford (Typic Xerorthents) sandy loam treatments received 62.0, 76.7, and 88.2 cm infiltrated water. Soil samples were taken at 20, 40, 60, 80 and 90 d after planting and analyzed for NO-3 and NH+4. Movement of N was correlated with both the presence of Terrazole and the quantity of water applied. Soil NH+4 was consistently higher in Terrazole treatments, suggesting that nitrification was reduced by the Terrazole. However, there was no significant increase in tissue N concentrations or yield due to Terrazole additions. Denitrification losses in the field were found to be 64% lower due to the presence of Terrazole.

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

Copyright © . Soil Science Society of America