Table 4 Annual average rates of change (percent per year) in total outputs, inputs, and productivity in United States agriculture, 1870-1979.
Item	1870-1900	1900-1925	1925-1950	1950-1965	1965-1979
Farm output	2.9	0.9	1.6	1.7	2.1
Total inputs	1.9	1.1	0.2	-0.4	0.3
Total productivity	1.0	-0.2	1.3	2.2	1.3
Labor inputs1	1.6	0.5	-1.7	-4.8	-3.8
Labor productivity	1.3	0.4	3.3	6.6	6.0
Land inputs2	3.1	0.8	0.1	-0.9	0.9
Land productivity	-0.2	0.0	1.4	2.6	1.2
1Number of workers, 1870-1910; hours of labor, 1910-1971. 2Cropland used for crops, including crop failure and cultivated summer fallow.

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