TABLE 2.-ANNUAL AND TOTAL AMOUNT OF ORGANIC MATERIAL PRODUCED BY THE COVER CROPS AND THE NITROGEN RE-
 TURNED TO THE SOIL BY THE LEGUMES (TOPS ONLY) IN THE PECAN EXPERIMENT. -Continued.
 Pounds per Acre of Organic Material Grown and
 Returned to the Soil Pounds of Nitrogen per Acre Returned to the
 Plot e3 t3 te So Soil by the Legumes**
 1932 I 1933 1 1934 I Total _____ ___ _
 Green Dry** Green Dry** Green | Dry** Green I Dry** 1928 1929 1930 1931 1932 1933 1934 Total

 1 2,000 376 7,500 1,410 8,000 1,504 74,504 14,007 66.8 63.4 19.4 80.8 8.1 30.3 32.3 301.1
 1,500 429 1,500 429 8,494 2,429 27,410 7,839 26.2 ........ 29.4 10.4 6.2 6.2 35.2 113.6
 2 8,000 1,456 9,000 1,638 10,000 1,820 81,343 14,804 76.2 44.2 5.6 180.5 45.1 50.8 56.4 458.8
 1,200 343 1,500 429 9,147 2,616 34,881 9,976 27.1 ........ 56.0 12.4 5.0 6.2 37.9 144.6
 3


 4 500 130 1,000 260 3,000 780 6,775 1,762 ............ ... -. ...... ...... ....
 2,500 715 2,500 715 10,272 2,938 38,906 11,128 27.1 -..... 58.5 12.4 10.4 10.4 42.6 161.4
 .... 13,400 2,439 75.6 .......... ......... ....... ... ............ ......... 75.6

 Averages of numerous analyses of materials (oven dry) grown at Gainesville, made by the Department of Chemistry
 and Soils over a period of years, and not of samples taken from the pecan experiment.
 ** Calculated from the oven dry percentages.
 *** Crotalaria was not weighed in 1929.
 t Rye was grown in 1928-29 and 1929-30.
 t Hairy vetch was grown for general comparison in Plot 4 the first winter of the experiment, 1927-28.