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Measurement Data Component

Title: Soil moisture data: AC0116, Ceredigion, 2013
Related Party - Organisation (Author): ADAS
Related Party - Organisation (Funder): Defra
Related Party - Organisation (Funder): Scottish Government
Related Party - Organisation (Funder): Welsh Assembly Government
Related Party - Organisation (Funder): DAERA Northern Ireland
Abstract:
On a commercial farm near Aberaeron, mid Wales (clay loam topsoil texture), direct N2O-N emissions were measured from replicated (x3) plots (4 x 15 m) following spring applications of manufactured nitrogen (N) fertilisers to grassland. A control treatment was included where no N fertiliser was applied. Ammonium nitrate (AN) fertiliser (34.5% N) was applied at 5 different rates; 80, 160, 240, 320 and 400 kg N/ha, and urea fertiliser (46% N) at a rate of 320 kg N/ha, in four split applications (early-March, early-April, late-May and mid-July). In separate AN and urea treatments, a commercially available nitrification inhibitor was tested; dicyandiamide (DCD) was sprayed at a rate equivalent to 10 kg DCD/ha onto the plots immediately after each N fertiliser application. The N supplied by the DCD was accounted for in the total N application of 320 kg N/ha, which was applied in four splits. A DCD only treatment was also included, where DCD was sprayed onto the soil surface in four split applications giving a total N application of 26 kg/ha. Additionally, AN fertiliser was also applied in six splits in early-March, mid-March, early-April, mid-April, late-May and mid-July; the first four splits were of 30-40 kg/N ha i.e. ‘little and often’. This dataset contains measurements of soil moisture as soil water-filled pore space (%) taken on the same days as nitrous oxide emissions measurements were made. The measurements were taken across all treatments in each block. The first measurement is a 'background' measurement i.e. before any treatments were applied. NA = not applicable. ND = not determined. If the data file is downloaded/opened in excel, dates may appear as dd-mm-yy instead of the standard yy-mm-dd.
Subject Keywords: Soil water contentGrassland soilsClay soils
Geographic Keywords: Ceredigion
Observed Properties: DateExperimental blockingExperimental treatmentSampling depthSoil water-filled pore spaceYear
Parameter: Block number
Parameter: Depth of soil sampling
Parameter: Measurement date
Parameter: Treatment
Parameter: Water-filled pore space
Parameter: Year experiment started

Geographic Extent -
    Longitude (West): -4.30
    Longitude (East): -4.03
    Latitude (South): 52.14
    Latitude (North): 52.30

Phenomenon Time -  Start Date/Time: 2013-02-27 End Date/Time:  2014-03-16
Result Time: 2014-03-16
Valid Time -  Start Date/Time: 2013-02-27 End Date/Time:  2014-03-16
Feature of Interest: biosphere
Publication Date: 2017-04-05

This data is made available under the terms of the Open Government Licence (Version 3).

Total file downloads: 2

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