The aim of this study was to develop a framework for estimating N2O emissions from N fertiliser use on pasture on different slope classes that would eventually be incorporated into the Agriculture Inventory Model and help to ensure that New Zealand’s emissions estimates are as accurate as possible.

Research set out to determine the contribution of national spatial datasets could make on two issues affecting the ability to forecast future wood availability from planted forests and the size of the planted forests estate: 1) The likelihood that individual forest blocks would be harvested; and 2) The probability that forest blocks would be deforested.

This report provides a review of available information for relevant factors and activity data for estimating New Zealand N2O emissions from pasture renewal following IPCC 2006 guidelines.

This report set out to validate the ewe and beef cow data currently being used in the NZ methane inventory model by comparing this data with all other available information, including: reviewing NZ literature on cow and ewe liveweights, obtaining current data from NZ flocks and herds; comparing dressing out percentages from ewes and beef cows with the inventory model and determining whether timing of the liveweights reflect a true average given the seasonal variation.

The report assesses the potential and required changes in activity data and/or inventory structure to capture benefits of four mitigation technologies most effectively in ruminant methane (CH4) and agricultural soils nitrous oxide (N2O) emissions inventories. The four potential mitigation technologies, comprising nitrification inhibitors, feed pads, and two alternative feeds - maize silage and high sugar grasses.

Reviewing the usage of Dressing Out (DO) percentage for different livestock classes as an important asset to farmers in enabling them to accurately estimate carcass weight from on farm liveweight and to target carcass weight ranges that will maximize returns for their own farming operation.

The aim of this study was to refine the method of predicting the partitioning of N between urine and dung to assess the impact on the national N2O inventory.

The equations used by the National Enteric Methane Inventory (NEMI) to predict the energy requirements of farmed ruminants were reviewed and assessed for the applicability to New Zealand conditions - Evaluating individual factorial components of MEtotal for dairy and beef cattle, sheep and deer.

A report on completed and on-going work that examines nitrous oxide emissions from the Waikato River and assesses the results in comparison to previous New Zealand emissions factors for indirect losses from rivers.

This report seeks to determine the impact of Urease inhibitors on changes in both the emissions factors FracGASF and for FracGASM for urea fertiliser-N and urine-N deposition in grazed pasture soils.

The report reviews the contribution of urease inhibitors for N fertiliser to emissions reductions in New Zealand's national greenhouse gas inventory and develops methods to describe how ammonia (NH3) emissions from pastoral agriculture soils can be reduced using urease inhibitors.

This report provides crop activity data and factors for use in estimating nitrous oxide emissions from cropping, and stubble and tussock burning in New Zealand. Recommendations are made for harvest index values for all key crops; root:shoot ratio values for use in estimation of below-ground residue; and residue nitrogen concentrations for key crops.

In this report, industry data on gross intake and digestibility of a set feeding situation and its nitrogen excretion rates for this feeding situation was collected and used to estimate greenhouse gas emissions.

This report classifies organic soils against the IPCC definition of organic soils with the object of clarifying the distinction between cultivated and managed organic soils, and evaluating the area of organic soils in New Zealand as at 1990. Organic soil definitions were proposed for LULUCF and Agriculture sectors of the National Greenhouse Gas Inventory.

A small size goat sector compared with other livestock sectors in NZ means a paucity of data on NZ goat husbandry has limited the ability to derive reliable estimates for enteric methane (Ch4) emission factors and nitrogen (N) excretion rates for the national goat herd.

This project aimed to improve the accuracy of data currently used in the NZ Greenhouse gas Inventory Report (GHGIR) by undertaking an assessment of the NZ pork industry's management practices.

The study was carried out to examine the effect of level of feed intake on methane yield in sheep fed a fresh forage diet covering the range of feed intake that will occur in practice on farms.

The aim of the results presented in this report is to compare the CH4 emissions per kg dry matter intake (DMI) from a group of ewes at 122-132 days of gestation when fed 2 x energy maintenance pasture intakes with CH4 emission values from a cohort of non-pregnant ewes fed at 1 x energy maintenance.

This report presents findings from a field study conducted to determine the nitrous oxide emission factors from application of animal excreta, following application in late autumn 2008 in three regions of New Zealand onto six different soil types. Results enabled the refinement of nitrous oxide emission factors to be determined - EF3 decreases as follows: cow urine > cow or cattle dung = sheep dung.

This paper presents the development and implementation of a methodology to incorporate a nitrous oxide mitigation technology, the nitrification inhibitor DCD, into the agriculture section of New Zealand’s greenhouse gas national inventory. These emission factors and parameters were modified because extensive field-based research has demonstrated significant and consistent reductions in nitrous oxide emissions and nitrate leaching where DCD is applied.

The purpose of this study was to provide a framework for estimating and upscaling N2O emissions from hill country farms, based on current understanding of the key factors affecting the spatial variability in N2O emissions.

This report researches the determined influence of elapsed time, between the deposition of urine and the application of the nitrification inhibitor (DCD), on the effectiveness of DCD to mitigate nitrous oxide (N2O) emissions from agricultural soils.

The objectives of this study was to determine N2O emission factors from application of dairy cow dung, beef cow dung, and sheep dung on 6 different soil types throughout New Zealand. In addition, it would also provide an opportunity to determine the effects of DCD use on N2O emissions from application of cow dung on two poorly-drained soils

This document aims to provide a comprehensive update on upscaling methodologies that can provide verification for the inventory calculation of agricultural greenhouse gas emission.

A research project concluding results on the mitigation potential of nitrification (DCD - Dicyandiamide) and urease (Agrotain) inhibitors to reduce nitrogen (N) losses from cattle urine and urea application to pasture soil.

A general overview of the methods used to estimate enteric methane emissions from New Zealand ruminants and provides full details of the algorithms used, along with the sources of all data used in the calculations.

The aim of the results presented in this report is to compare the CH4 emissions per kg DMI from groups of lambs fed intakes of 0.8, 1.2, 1.6 and 2 times maintenance with the CH4 emission from ewe and wether lambs.

Determination of methane emissions per unit of intake in young dairy heifers compared to mature cows. With current national inventory measures identifying a single value for cattle regardless of age, the aim of the trial is to determine if CH4 emission per kg of DMI are the same for young dairy heifers and mature dairy cows.

This project aims to: 1. To provide robust, mean monthly dairy pasture quality (metabolisable energy (ME) and crude protein (CP)) estimates for South Island provinces. 2. To provide a sub-sample of individually GPS co-ordinated pasture samples with accompanying estimates of ME and CP to LandCare NZ satellite sensing research team for use in the development of a novel pasture quality estimation method using satellite imagery. 3. To facilitate the development of novel pasture assessment methods via remote sensing. This was to be done by hosting the meeting of the LandCare NZ representative and the CSIRO ‘Pastures from space’ representative here in NZ.

This report reviews the current status of the measurement programme of methane (CH4) emissions from NZ's farmed ruminant livestock using the "SF6 tracer technique" including the quantitative understanding of the main determinants of CH4 emissions.

This report presents the results obtained by estimating total dairy sector GHG emissions from the sum of emissions in 17 different regions for the years 1990 and 2006 and compares them with the current estimates of dairy sector emissions which are based a national aggregate model.

A review that locates and dissects multiple studies of relevance to the magnitudes of FracGASM and FracGASF as used in New Zealand's current N20 inventory. Currently the NZ N20 inventory uses the IPCC defauls of 0.2 and 0.1 for FracGASM and FracGASF respectively.

This report presents findings from a field study conducted to determine the N2O emission factors from application of animal excreta, following application in late autumn 2008 in three regions of New Zealand. Excrete included dairy cow dung, beef cow dung, sheep dung, and cow urine.

The objective of this report was to review the key factors used to estimate non-CO2 greenhouse gas emissions from cropping systems. Non-CO2 greenhouse gas emissions (nitrous oxide and methane) from cropped land are accounted for in the New Zealand greenhouse gas inventory.

The methane inventory model uses population and slaughter data of model the methane output from the sheep, beef, dairy, and deer sectors from 1990 onwards. The calculation of methane produced by each sector is calculated from the total feed consumed and is a function of the total animal population, the productivity of those animals and the quality of the pasture being consumed.

This report puts forward New Zealand specific excretion factors for poultry within New Zealand and also estimates the total amount of emissions generated for the 2008 calendar year. Emission factors for the broiler, non-chicken meat and layer hen industries are subsequentially determined.

This report sets out to review the national methane inventory model by reviewing the accuracy and validity of data used, identifying limitations and consequences, and identifying potential future research and development work is needed.

Report on the effectiveness of two key policy instruments (an incentive to use a nitrification inhibitor and a charge on nitrogen (N) fertiliser) for reducing nitrous oxide and nitrate leaching from arable and annual horticultural land uses.

Developing revised emission factors for nitrous oxide emissions from agricultural pasture treated with nitrification inhibitors.