Title

1979
2003

Pie chart with 8 items.

Item 1, All gravity systems 62.3% 31.2.
Item 2, Center pivot sprinkler 17.2% 8.6.
Item 3, Mechanical-move sprinkler 10.2% 5.1.
Item 4, Hand-move sprinkler 7.4% 3.7.
Item 5, Permanent-set sprinkler 2.0% 1.
Item 6, Other 1/ 1.0% 0.5.
Item 7, Low-flow .0% No data.
Item 8, Subirrigation .0% No data.

2%

Pie chart with 7 items.

Item 1, All gravity systems 43.4% 43.3%.
Item 2, Center pivot sprinkler 40.1% 40%.
Item 3, Mechanical-move sprinkler 5.0% 5%.
Item 4, Hand-move sprinkler 3.2% 3.2%.
Item 5, Permanent-set sprinkler 2.3% 2.3%.
Item 6, Low-flow 5.2% 5.2%.
Item 7, Subirrigation .7% 0.7%.

1%
1%
5%
2%
7%
3%
5%
10%
17%
44%
40%
63%
1/ Other for 1979 includes both low-flow and subirrigation.
Source: USDA-ERS, based on Farm and Ranch Irrigation Surveys for 1979 and 2003 (USDC, 1982; USDA, 2004a).

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