Nitrate leaching and adsorption vin a krasnozem from redland bay, qld. I. leaching of banded ammonium nitrate in a horticultural rotation

Black A.S. and Waring S.A. (1976) Nitrate leaching and adsorption vin a krasnozem from redland bay, qld. I. leaching of banded ammonium nitrate in a horticultural rotation. Australian Journal of Soil Research, 14 2: 171-180. doi:10.1071/SR9760171


Author Black A.S.
Waring S.A.
Title Nitrate leaching and adsorption vin a krasnozem from redland bay, qld. I. leaching of banded ammonium nitrate in a horticultural rotation
Journal name Australian Journal of Soil Research   Check publisher's open access policy
ISSN 0004-9573
Publication date 1976
Sub-type Article (original research)
DOI 10.1071/SR9760171
Volume 14
Issue 2
Start page 171
End page 180
Total pages 10
Subject 1111 Nutrition and Dietetics
2304 Environmental Chemistry
Abstract Ammonium nitrate at a rate of 165 kg nitrogen ha-1 was placed in bands 76 cm apart in a krasnozem. The fertilized plots were either kept bare or cropped using a horticultuial rotation. Soil samples were collected at various time intervals to a depth of 300 cm. The amount of leachate was estimated from the water balance equation and the relative movement of nitrate with' water determined. Of the mineral nitrogen initially in the soil, 72% (201 kg nitrogen ha-1) remained as nitrate between the depths of 40 and 120 cm following a bean crop. Prolonged cover cropping with oats decreased the amount of nitrate to less than 44 kg nitrogen ha-1 (<2mg nitrate nitrogen kg-1) in the surface 160 cm of the profile. In the bare plots, nitrate movement per 10 mm of leachate decreased with depth, lateral movement was gradual, and vertical movement was concentration dependent below 160 cm. These results are discussed in terms of the direction of water flow, soil structural properties and nitrate adsorption.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import
 
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Created: Tue, 14 Jun 2016, 06:53:05 EST by System User