public read uid=chen,o=unaffiliated,dc=ecoinformatics,dc=org read uid=datalibrarian,o=unaffiliated,dc=ecoinformatics,dc=org all Professor Deli Chen The University of Melbourne Reader

Department of Resource Management and Geography, Melbourne School of Land and Environment The University of Melbourne Parkville VIC 3010 Australia

+61 3 8344 8148 delichen@unimelb.edu.au http://www.findanexpert.unimelb.edu.au/researcher/person13219.html Dr. Helen Suter The University of Melbourne Research Fellow

Department of Resource Management and Geography, Melbourne School of Land and Environment The University of Melbourne Parkville VIC 3010 Australia

+61 3 8344 0179 +61 3 8344 5579 helencs@unimelb.edu.au http://www.findanexpert.unimelb.edu.au/researcher/person16560.html Ms. Siobhann McCafferty Institute for Future Environments, Queensland University of Technology Data Librarian

2 George Street Brisbane QLD 4000 Australia

+61 7 3138 0457 siobhann.mccafferty@qut.edu.au Custodian/Steward This data descibes results of a laboratory experiment to investigate the impact of two different nitrification inhibitos (DCD and DMPP) on mineral N transformations and N2O emissions under controlled temperature and moisture conditions. Nitrification inhibitors DCD DMPP N2O Nitrous oxide Soil mineral N Laboratory incubation Dookie VIC 0502 0799 anzsrc-for Mackay, Queensland 149.19 149.19 -21.14 -21.14 Dookie 145.69 145.69 -36.32 -36.32 1287715838119 1287716061357

Soil was incubated at controlled moisture content (60 and 85% Water filled pore space) for 70 days. Soil was extracted on a regular basis for measurement of mineral N (ammonium and nitrate). Gas samples were collected periodically for N2O with a closure time of 24 hrs.

Gas Chromatograph - Agilent 7860 - ECD, TCD and FID detectors Skalar Segmented Flow Analyser (SAN++) Studies cover a time period of 10 days to 70 days depending upon the type of fertiliser applied. Replicate soil samples were incubated and individual replicates of 3 were destructively sampled at each sampling time. 1287715838119 Principal Investigator DAFF/GRDC Dookie topsoil NH4+ under different fertiliser treatments NH4+ in Dookie topsoil measured in soil extract Dookie NH4 topsoil.JPG jpeg ecogrid://knb/Suter.4.1 Temperature Temperature Temperature of incubation (oC) celsius natural Time Days days after fertiliser application dd NH4+ Ammonium-N Ammonium-N measured in soil extract microgramsPerGram natural Treatment Treatmet Fertiliser treatment CK=control, Urea = urea fertiliser, DMPP = Urea + nitrification inhibitor DMPP, DCD = Urea + nitrification inhibitor DCD Nitrification inhibitor trial N2O data Dookie N2O data for the Dookie soil nitrification inhibitor tiral with DMPP and DCD treatments NI_N2O_Dookie.txt 58697 1 #x0A column #x09 ecogrid://knb/Suter.5.1 uid=chen,o=unaffiliated,dc=ecoinformatics,dc=org read uid=datalibrarian,o=unaffiliated,dc=ecoinformatics,dc=org all Soil Type of soil (either topsoil or subsoil) D-T = Dookie topsoi,l D-S = Dookie subsoil day day after fertilisation dd C Organic C (%) in soil number natural N Total N (%) in soil number natural pH pH of soil measured on 1:5 extract number natural C_N Carbon Nitrogen ratio number natural N_activity Nitrification activity (amount of nitrate produced over time) microgram per gram per hour natural texture soil texture o_fsl = organic fine sandy loam, med_C = medium clay Temp temperature of incubation (oC) celsius natural N2O-T total N2O emitted in micrograms dimensionless natural N2O_g N2O emitted per g of soil microgramsPerGram natural WFPS soil water filled pore space (%) number natural appl_N amount of nitrogen applied per treatment microgramsPerGram natural Treatment fertiliser treatment applied C= control, U = granular urea, DMPP = granular urea + DMPP, DCD = granular urea + DCD Treatment treatment name (simple) C = Control, U = urea, UE = Urea + DMPP, UD = Urea + DCD Treatment treatment number 1 Contol 2 Urea 3 Urea + DMPP 4 Urea + DCD 916 Dookie mineral N Mineral N (Nitrates and Ammonium) measured in the Dookie topsoil and subsoil over 70 days of incubation Dookie_N.csv column , ecogrid://knb/suter.41.1 uid=datalibrarian,o=unaffiliated,dc=ecoinformatics,dc=org all Depth Soil depth Depth of soil either topsoil (0-10 cm) or subsoil (10-20 cm) dimensionless natural Treat Treatment Fertiliser Treatment of C;control, U; granular urea, DMPP; granular urea coated with the nitrification inhibitor DMPP, DCD; granular urea coated with the nitrification inhibitor DCD fertiliser type Day Days after fertiliser application Days after fertiliser application when soil extractions were done nominalDay natural Temp Temperature Temperature of incubation being 5, 15 or 25oC celsius natural Rep Replicate Replicate of samples number natural Urea Urea Concentration of uea remaining in soil microgramsPerGram natural Nitrates_N Nitrates_N Nitrates (NO3 and NO2) remaining in soil microgramsPerGram natural Ammonium_N Ammonium_N Ammonium remaining in soil microgramsPerGram natural Microgram of compound produced per microgram of soil per time true 2