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Measurement Data Component

Title: Soil moisture data: AC0116, County Down, 2011
Related Party - Organisation (Author): AFBI
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
At the AFBI Hillsborough research farm near Hillsborough, south-east Northern Ireland (clay loam topsoil texture), direct N2O-N emissions were measured using 40 x 40 cm stainless steel static chambers from replicated (x3) plots (2 x 16 m) following spring applications of manufactured nitrogen (N) fertilisers to permanent grassland. A control treatment was included where no N fertiliser was applied. Calcium ammonium nitrate (CAN) fertiliser (27% 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 (late-March, mid-April, mid-May and early-July). Additionally, CAN fertiliser was also applied in six splits in late-March, early-April, mid-April, late-April, mid-May and early-July; the first four splits were of 30-40 kg/N ha i.e. ‘little and often’. In separate CAN 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 CAN and urea plots (2% solution) immediately after N fertiliser application at a rate of 320 kg N/ha, in four split applications. A DCD only treatment was also included, where DCD was sprayed onto the soil surface at a rate equivalent to 10 kg DCD/ha, in four split applications. This essentially gave a Control + DCD treatment which meant that N supplied by the DCD in the CAN + DCD and Urea + DCD did not need to be accounted for. Two extra treatments were included by AFBI at the Hillsborough site; 1) Urea granules coated with a powder of the commercially available urease inhibitor (Agrotain) to c.400 ppm and applied evenly by hand in four split applications to give a total N application rate of 320 kg N/ha; 2) Agrotain coated urea granules (c.400 ppm), applied evenly by hand in four split applications to give a total N application rate of 320 kg N/ha, with DCD sprayed immediately over the fertiliser after application at a rate equivalent to 10 kg DCD/ha. In any of the relevant treatments, the N supplied by the DCD was not accounted for in the 320 kg N/ha application, due to the Control + DCD treatment (outlined above). 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. 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: County Down
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): -6.22
    Longitude (East): -5.95
    Latitude (South): 54.37
    Latitude (North): 54.53

Phenomenon Time -  Start Date/Time: 2011-03-18 End Date/Time:  2012-03-13
Result Time: 2011-03-18
Valid Time -  Start Date/Time: 2012-03-13 End Date/Time:  2012-03-13
Feature of Interest: biosphere
Publication Date: 2017-04-05

This data is made available under the terms of the FBA Licence.

Total file downloads: 321

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