Table 3 Acreages, yields, and production of grains in the United States.
				Indexes (1880-1889 = 100)
Period	Acreage (millions)	Production (millions of metric tons)	Yield (metric tons per acre)	Acreage	Production	Yield
1880-1889	135.0	72.2	0.535	100	100	100
1890-1899	162.8	86.8	0.533	121	120	100
1900-1909	185.2	103.5	0.559	137	143	104
1910-1919	208.1	111.2	0.534	154	154	100
1920-1929	218.2	120.2	0.551	160	169	103
1930-1939	219.6	102.8	0.468	163	142	87
1940-1949	212.5	134.7	0.634	157	187	119
1950-1959	187.9	143.3	0.762	139	198	142
1960-1964	160.7	176.7	1.099	119	244	205
1965-1969	152.9	215.3	1.408	113	298	263
1970-1974	155.0	223.9	1.445	115	310	270
1975-1979	173.0	282.4	1.632	128	391	307

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