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Measurement


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Download CSV Daily SMN AC0213 Cambridgeshire 2012.csv 0.01MB


Measurement Data Component

Title: Daily topsoil mineral nitrogen: AC0213, Cambridgeshire, 2012
Related Party - Organisation (Author): ADAS UK Ltd.
Related Party - Organisation (Funder): Defra
Abstract:
On a commercial arable farm near Cambridge, eastern England (clay topsoil texture), direct nitrous oxide (N2O) and ammonia (NH3) emissions were measured from replicated (x3) plots (24 x 11 m), following spring applications of manufactured nitrogen (N) fertilisers to winter wheat. A control treatment was included where no N fertiliser was applied. Ammonium nitrate (AN) fertiliser (34.5% N), urea fertiliser (46% N) or an ammonium sulphate nitrate (ASN) fertiliser (26% N) were applied at a rate of 200 kg N/ha, in three split applications (mid-March, mid-April and early-May). In separate treatments, two commercially available nitrification inhibitors were tested; dicyandiamide (DCD) was sprayed at a rate of 10 kg/ha (6.5 kg N/ha) onto the AN and urea plots immediately after N fertiliser application, and a 3,4-dimethylpyrazole phosphate (DMPP) containing fertiliser (26% N) was also applied at a rate of 200 kg N/ha, in three split applications. The N supplied by the DCD was accounted for in the 200 kg N/ha application. Additionally, AN and urea fertiliser was also applied in five equal splits in mid-March, late-March, mid-April, late-April and early-May i.e. 'little and often'. This dataset contains topsoil mineral nitrogen values measured to a depth of 0-10 cm. Measurements were taken from the control and ammonium nitrate treatments only, on days when nitrous oxide flux measurements were also made. Treatment values shown are the mean of three blocks. The first measurement is a 'background' measurement i.e. before any treatments were applied. 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 mineral nitrogenTop soilArable landWinter wheatClay soils
Geographic Keywords: Cambridgeshire
Observed Properties: Ammonium-nitrogenDateExperimental treatmentNitrate-nitrogenSampling depthYear
Parameter: Depth of soil sampling
Parameter: Measurement date
Parameter: Soil ammonium-nitrogen content
Parameter: Soil nitrate-nitrogen content
Parameter: Treatment
Parameter: Year experiment started

Geographic Extent -
    Longitude (West): -0.16
    Longitude (East): 0.11
    Latitude (South): 52.19
    Latitude (North): 52.35

Phenomenon Time -  Start Date/Time: 2012-03-12 End Date/Time:  2013-03-13
Result Time: 2013-03-13
Valid Time -  Start Date/Time: 2012-03-12 End Date/Time:  2013-03-13
Feature of Interest: biosphere
Publication Date: 2017-02-03

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

Total file downloads: 58

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