TABLE 1.-RESULTS OF EXPERIMENT ON FALL CULTURAL PRACTICES FOR ROOT-KNOT CONTROL IN FLORIDA
 CIGAR-WRAPPER TOBACCO SHADES.

 Treat- Root. Yield Grade Results Compared
Crop Year ment Treatment Knot Per A. Index Crop with Treatment 3
 No. Index* Index Grade Crop
 __Yield Index Index
 lbs. % % %
1937-1938 1 Fallow (roots removed) 47 1395 0.872 1216 101 98 99
 2 Fallow 41 1446 0.893 1291 105 100 105
 3 Fallow-oats 45 1380 0.891 1230 100 100 100
 4 Sorghum-fallow 62+ 1136- 0.898 1020 82- 101 83
 5 Grass and weeds 52 1246 0.913 1138 90 102 93
 Least significant difference** 11 234 0.049 253

1938-1939 1 Fallow (roots removed) 14 795 1.056 840 94 103 97
 2 Fallow 8 844 1.042 879 99 102 91
 3 Fallow-oats 10 849 1.023 869 100 100 100
 4 Sorghum-fallow 19+ 724- 1.037 751 85- 101 86
 5 Grass and weeds 17+ 567- 1.019 578- 67- 100 67-
 Least significant difference** 6 115 0.046 131

1939-1940 la Soybeans-fallow 27+ 1262 0.793 1001- 96 94 90-
 2 Fallow 17 1264 0.844 1067 96 100 96
 3 Fallow-oats 11 1321 0.841 1111 100 100 100
 4a Crotalaria-fallow 14 1291 0.800 1033 98 95 93
 5 Grass and weeds 8 1281 0.905+ 1159 97 108+ 104
 Least significant difference** 12 71 0.054 88

 1940-1941 lb Cockleburs-fallow 64+ 1023 0.861 881 92 100 92
 2 Fallow 34 1057 0.843 891 95 98 93
 3 Fallow-oats 41 1110 0.861 956 100 100 100
 4a Crotalaria-fallow 59 1058 0.853 902 95 99 94
 S5 Grass and weeds 24 1045 0.934+ 976 94 108+ 102
 SLeast significant difference** 22 90 0.043 104
 All 4 years 2 Fallow 25 1153 0.905 1032 99 100 99
 3 Fallow-oats 27 1165 0.904 1041 100 100 100
 5 Grass and weeds 25 | 1035- 0.943+ 962- 89- 104+ 92-
 _Least significant difference** 6 56 0.030 74 _
 Average values at beginning of experiment, 71.
 ** Odds for significance 19:1. (+indicates values significantly higher than those of treatment 3; --lower).