TABLE 1.

Sizes of populations of cultivated bacteria from rhizospheres of plants grown in field plots and collected 12 weeks after field release of S. meliloti L33

Plot	No. of bacteria in M. sativa rhizospheres (CFU g [wet wt] of roots−1)		No. of bacteria in C. album rhizospheres (CFU g [wet wt] of roots−1)
	S. meliloti L33a	Total bacteriab	S. meliloti L33a	Total bacteriab
Plots inoculated with S. meliloti L33
1	3.3 × 105	6.4 × 107	4.2 × 103	1.5 × 107
2	2.4 × 105	6.4 × 107	2.1 × 103	1.8 × 107
3	3.5 × 105	6.9 × 107	1.9 × 103	2.0 × 107
Avg	3.1 × 105	6.6 × 107	2.7 × 103	1.8 × 107
Noninoculated plots
4	2.1 × 105	7.4 × 107	2.2 × 102	2.1 × 107
5	5.6 × 104	5.6 × 107	3.6 × 101	1.7 × 107
6	1.3 × 103	9.4 × 107	NDc	1.3 × 107
Avg	8.9 × 104	7.5 × 107	1.0 × 102	1.7 × 107

^aNumber of luciferase-positive colonies grown on NPA.

^bNumber of colonies grown on RAA.

^cND, not detected.