Ielts sample essays collection

IELTS SAMPLE ESSAYS COLLECTION 
VOLUME 1 – Academic Training 
http://ieltsonlinetests.com
 
Overall, the main nitrogen sources are waste disposal in landfills, leaks from storage 
tanks, fertilisers and finally, more natural sources
such as
lightning and vegetation. 
Furthermore, the diagram also represents the concentration of nitrogen in 
groundwater due to the sources stated above, where landfill disposal is the greatest. 
Nitrogen is oxidised by lightning and then undergoes a fixation process 
with
vegetation. However, it is the denitrification process which causes nitrogen to be 
found in groundwater. In addition to this, nitrogen is absorbed by soil particles due to 
fertilisers and then
it
leak
s
, resulting in an increase in concentration of nitrogen in 
groundwater. Moreover, further sources of nitrogen include that of industrial leaks 
and waste disposal in landfills. 
When comparing all these sources
,
and the concentration of nitrogen in underground, 
the ones that secrete significantly greater concentrations are that of industrial leaks 
and waste disposal in 
landfills
. Finally, all of these nitrogen compounds are then 
directed towards the groundwater discharge zone and secreted to the ocean. 
(183 
words)
 
Score: 7.0 
Detail comments 
(TA) Task Achievement
Covers the requirements of the task and presents a clear overview of main trends, 
differences or stages. Clearly presents and highlights key features but could be 
more fully extended. 
(CC) Coherence and Cohesion
Logically organises information and ideas. There is clear progression throughout.
Uses a range of cohesive devices appropriately although there may be some under 
use.