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Measurement Data Component

Title: Annual N2O measurements and associated data: AC0116, Herefordshire, 2012-2013
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
On a commercial farm near Ross-on-Wye, west England (sandy clay loam topsoil texture), direct N2O-N emissions were measured from replicated (x3) plots (5 x 15 m) arranged in a randomised block design. Cattle slurry (c.40 m3/ha), broiler litter (6.5 t/ha) and layer manure (6.5 t/ha) were applied to cereal stubble in the autumn (early-September) and to winter wheat in the spring (late-February). Cattle FYM (30 t/ha) was also applied in the autumn. The cattle slurry was applied using the ADAS small plot applicator set up for surface broadcast and trailing hose application. The solid manures were spread by hand. In the autumn the surface broadcast cattle slurry and the poultry manures were incorporated within 24 hours of application. An untreated control treatment was included where no manure was applied. Following manure application, measurements of direct N2O-N were made over c.12 months, using 5 static chambers (0.8 m2 total surface area) per plot and analysed by gas chromatography. In a separate area of the plot, a wind tunnel technique was used (one per plot) to measure ammonia-N emissions for 7 days after each cattle manure application and for 21 days after each poultry manure application. Grain yields and total N offtakes were measured following harvest in August 2013. Where measured, this dataset contains: annual nitrous oxide emissions (kg N2O-N/ha/year), annual nitrous oxide emission factors (% of total nitrogen applied), year experiment started, crop type, previous crop type, soil texture, soil clay content, soil dry bulk density, soil organic carbon content, soil pH, total rainfall during the experimental period, nitrogen source, experimental treatments, application timing, application method, block number, total nitrogen applied, readily available nitrogen (i.e. if present, the sum of ammonium-N, nitrate-N and uric acid-N) applied, cumulative ammonia emissions, cumulative nitrate leaching loss, crop yield, crop total nitrogen offtake, grain nitrogen offtake, manure dry matter, manure pH, manure organic carbon, manure ammonium-N applied, manure nitrate-N applied, manure uric acid-N applied and time to incorporation. ND = not determined. NA = not applicable. 'Rainfall during the experimental period' = cumulative rainfall from the first day of manure application to the last day of N2O sampling. The N2O emission factors are calculated using annual cumulative N2O values to 15 decimal places, however the annual cumulative N2O and emission factor values have been reported to 2 decimal places.
Subject Keywords: Nitrous oxideCattle slurryCattle farmyard manureBroiler litterLayer manureArable land
Geographic Keywords: Herefordshire
Observed Properties: Ammonia emissionAmmonium-nitrogenApplication methodsApplication timingCrop nitrogen offtakeCrop yieldCropsDry matter contentEmission factorExperimental blockingExperimental treatmentGrain nitrogen offtakeNitrate leachingNitrate-nitrogenNitrogen sourceNitrous oxide mass fluxRainfallReadily available-nitrogenSoil clay contentSoil dry bulk densitySoil organic carbonSoil pHSoil textureTime to incorporationTotal nitrogenTotal organic carbonUric acid-nitrogenYearpH
Parameter: Annual nitrous oxide emission
Parameter: Annual nitrous oxide emission factor (% of total nitrogen applied)
Parameter: Application method
Parameter: Application timing
Parameter: Block number
Parameter: Clay content
Parameter: Crop total nitrogen offtake
Parameter: Crop type
Parameter: Crop yield (85% dry matter)
Parameter: Cumulative ammonia emission
Parameter: Cumulative nitrate leaching loss
Parameter: Grain nitrogen offtake
Parameter: Manure ammonium-N applied
Parameter: Manure dry matter
Parameter: Manure nitrate-N applied
Parameter: Manure pH
Parameter: Manure total organic carbon
Parameter: Manure uric acid-N applied
Parameter: Nitrogen source
Parameter: Previous crop type
Parameter: Rainfall during the experimental period
Parameter: Readily available-nitrogen applied
Parameter: Soil dry bulk density
Parameter: Soil organic carbon
Parameter: Soil pH
Parameter: Soil texture
Parameter: Time to incorporation
Parameter: Total nitrogen applied
Parameter: Treatment
Parameter: Year experiment started

Geographic Extent -
    Longitude (West): -2.72
    Longitude (East): -2.44
    Latitude (South): 51.83
    Latitude (North): 52.00

Phenomenon Time -  Start Date/Time: 2012-09-05 End Date/Time:  2014-02-19
Result Time: 2014-02-19
Valid Time -  Start Date/Time: 2012-09-05 End Date/Time:  2014-02-19
Feature of Interest: biosphere
Publication Date: 2017-04-05

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

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