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Nutrient leaching driven by rainfall on a vermiculite clay soil under altered management and monitored with high-frequency time resolution

Ulen, Barbro (2020). Nutrient leaching driven by rainfall on a vermiculite clay soil under altered management and monitored with high-frequency time resolution. Acta Agriculturae Scandinavica, Section B - Soil and Plant Science. 70 , 392-403
[Journal article]

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Abstract

Nutrient leaching from clay soils can show extreme temporal and spatial variation. Using an optical sensor (hourly data storage), a Swedish field with vermiculite clay was monitored for waterflow (Q expressed in mm), turbidity values (TURB), and nitrate-nitrogen concentrations (CNO3N, mg L-1)in four hydrological years representing different cropping/soil management regimes. Mean TURB-Qslope (1300) decreased in the order: ploughed soil > winter wheat > unfertilized fallow > winterwheat after drainage system renovation + structure-liming of topsoil and backfill, estimated in the initial phase from 16 selected autumn events. A similar ranking was found for variability inturbidity relative to that in discharge (CVT/CVQ) in the entire autumn. Mean CNO3N-Q slope (=2)was significantly lower under fallow than in the three cropping systems (7-32), confirming results from adjacent experimental plots. A spring-period had no snow cover or intensive rain, butinsitumonitoring revealed that nutrient leaching was still substantial. Particulate- and dissolved reactive phosphorus, and nitrate-nitrogen leaching was estimated reasonably well (less than 8% difference) based on in situ high-frequency resolution measurements, compared with laboratory analysis of weekly composite samples. Accurate assessment ofC-Q relationships in agricultural drainage water across temporal and spatial scales is therefore important.

Authors/Creators:Ulen, Barbro
Title:Nutrient leaching driven by rainfall on a vermiculite clay soil under altered management and monitored with high-frequency time resolution
Year of publishing :2020
Volume:70
Page range:392-403
Number of Pages:12
Publisher:Taylor & Francis
ISSN:0906-4710
Language:English
Publication Type:Journal article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution-Noncommercial-No Derivative Works 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 405 Other Agricultural Sciences > Environmental Sciences related to Agriculture and Land-use
Keywords:C–Qslope, DRP, drainage system, hysteresis, NO3N, turbidity
URN:NBN:urn:nbn:se:slu:epsilon-p-105173
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-105173
Additional ID:
Type of IDID
DOI10.1080/09064710.2020.1750686
ID Code:17241
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Soil and Environment
(S) > Dept. of Soil and Environment
Deposited By: SLUpub Connector
Deposited On:10 Jul 2020 10:27
Metadata Last Modified:10 Jul 2020 10:27

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