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The change in the amount of fencing (as a proportion of bank length) for each management zone over the 2002-2012 period is shown in the graph below. The Lake Taupō, Upper Waikato, and Waihou Piako management zones had the largest proportions of bank length fenced (67, 67, and 68 per cent respectively) in 2012. The Coromandel, Lower Waikato, and West Coast management zones had the smallest proportions of bank length fenced (44, 46, and 20 per cent respectively) in 2012.
Significant increases in the proportion of bank length fenced over the 2002-2012 period were observed within the Upper Waikato, Waihou Piako, and Waipa management zones.
Between 2002 and 2012 the amount of fencing (as a proportion of bank length) increased on both dairy and drystock farms. The proportion of bank length fenced increased from about 47 per cent in 2002 to 72 per cent in 2012 for dairy and from 23 per cent in 2002 to 30 per cent in 2012 for drystock. However, between 2007 and 2012, the amount of fencing increased for dairy but not for drystock, reflecting a reduction in the rate of change for drystock and an increase in the rate of change for dairy relative to the previous 5-year period (2002-2007).