ETS and the Arable industry
Stuart Wright
New Zealand’s Greenhouse Gas
Inventory 1990–2010
• Agriculture (chapter 6)
• 2010
• The agriculture sector was the largest source of emissions
in 2010, contributing 33,748.4 Gg CO2-e (47.1 per cent) of
total emissions. New Zealand has a unique emissions
profile amongst developed countries. In most other
developed countries, agricultural emissions are typically
less than 10 per cent of total emissions.
• The largest sources of emissions from the agriculture sector
in 2010 were enteric fermentation from dairy cattle and
sheep, and nitrous oxide emissions from agricultural soils.
Yield trends in wheat
UK and New Zealand
ADDING VALUE TO THE BUSINESS OF ARABLE FARMING
Cultivation practice following grass
Can we lower our crop establishment
emissions without reducing our crop
yields and margins?
ADDING VALUE TO THE BUSINESS OF ARABLE FARMING
Spring barley yields Year 1 - 3 (t/ha)
Wanganui 2009 - 2011
Establishment
Method
Year 1
Year 2
Year 3
Mean
Plough
6.8
8.3
6.7
7.3
Top Work
7.2
7.9
6.9
7.3
Direct
7.1
7.9
7.0
7.3
Aerate + Direct
7.0
8.2
6.8
7.3
Yields based on plots receiving same of nitrogen as paddock approx 90 kg N/ha for the spring
barley
ADDING VALUE TO THE BUSINESS OF ARABLE FARMING
The Sirius Wheat Calculator
software
2012 Wheat Calculator will
be available from Rob
Craigie at FAR from late July.
Email: craigier@far.org.nz
ADDING VALUE TO THE BUSINESS OF ARABLE FARMING
Optimising ryegrass seed
yields with less N input
maximum
seed yield
Seed yield (kg/ha)
2000
1500
1000
Luxury uptake
minimum plant N
for max yield
500
0
0
50
100
150
200
250
300
Total plant N [straw+seed+roots] (kg N/ha)
ADDING VALUE TO THE BUSINESS OF ARABLE FARMING
350
400