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State and trends


Table 2.2.1: Land-use trends in Canada and the US (‘000 hectares) Land-use categories


1990 US Forest


Croplands Grasslands Settlements Wetlands Other land


Subtotal, US


CANADA Forest


Croplands Grasslands Settlements Wetlands Other land


(Unmanaged forest & wetland) Subtotal, CANADA


298 598 170 448 350 109 38 602 44 453 34 021 936 231


1990


232 715 49 120 7 890 1 881 1 065


705 796


(265 220) 998 467


two processes. This makes a thorough analysis difficult as different numbers exist in the published literature for the same land-uses, which requires further explanation and reconciliation.


Both countries also produce agricultural censuses every five years that provide detailed analyses of changes in land- use associated with farming and ranching. The shifts in production reported are driven by market signals and policy changes. These shifts in production have impacts on the environment, through greenhouse gas emissions, as well as impacts on rural economies.


After analysing data from all these sources, three types of land-use changes emerge as most significant in recent years:


300 848 160 107 347 142 49 676 44 060 34 397


936 230 2005


232 085 50 018 7 399 2 214 453


706 298 (355 462) 998 467


302 033 159 243 346 439 50 624 43 330 34 562 936 231


2010


231 847 50 152 7 253 2 360 521


706 334


(265 632) 998 467


302 386 159 230 346 430 50 614 43 025 34 545


936 230 2013


231 709 50 236 7 166 2 411 519


706 426 (265 772) 998467


(1) forest to cropland; (2) cropland to settlement; and (3) forest to settlement.


2.2.1 Canadian land-use change


Between 1989 and 2006, the amount of cropland in Canada rose by around 1 per cent per year, net, primarily due to land- use shifts of forest to cropland (Environment Canada 2014; Statistics Canada 2012). But the trend over the past 25 years is a declining one.


The forest-to-cropland changes have


ranged from +2.6 per cent for 1989–1990, to +1.3 per cent in 2004–2005, and +1 per cent of cropland area for 2009– 2010 at the national scale. The cropland-to-forest changes have been on the order of one-fifth of the annual forest- to-cropland shifts, resulting in a long-term declining, but


37


2005


2010 -----------------------------------‘000 hectares------------------------------------------


2013


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