Number of tractors of United States increased from 244.88 per 100 sq. km of arable land in 1988 to 271.18 per 100 sq. km of arable land in 2007 growing at an average annual rate of 0.55 %.
Agricultural machinery refers to the number of wheel and crawler tractors (excluding garden tractors) in use in agriculture at the end of the calendar year specified or during the first quarter of the following year. Arable land includes land defined by the FAO as land under temporary crops (double-cropped areas are counted once), temporary meadows for mowing or for pasture, land under market or kitchen gardens, and land temporarily fallow. Land abandoned as a result of shifting cultivation is excluded.
It's a one pager PDF full of live links to agriculture-related data, statistics, and dashboards from leading industry sources. It will be a useful resource for any analyst, business executive, or researcher with an interest in the food security and prices, agricultural production and supply and much more.