View Full Table | Close Full ViewTable 1.

Rhizobium effectiveness index (calculated as nodule number × nodule color × plant color) as affected by medic species × rhizobium inoculum interaction (p < 0.001) at 45 d after emergence. Data are means across three replicates and 2 yr (n = 6).

 
Rhizobium inoculum
Medic species M2 WSM1115 Nitragin N M49 Nitragin A UTC†
Index
Medicago arabica (L.) Huds. 78 b BC‡ 150 a AB 211 a A –46 bc D –29 b D 0 a CD
Medicago lupulina L. 267 a A 148 a B 162 a B –30 bc C 149 a B 3 a C
Medicago minima (L.) Bartal. 95 b A 174 a A 119 a A –23 bc B 138 a A 0 a B
Medicago orbicularis (L.) Bartal. 186 a A 193 a A 148 a A –33 bc B 147 a A 3 a B
Medicago polymorpha L. 216 a A 211 a A 142 a A 34 b B –18 b B 0 a B
Medicago rigidula (L.) All. –15 c B –22 b B 3 b B –63 c B 138 a A 0 a B
Medicago rigiduloides E. Small –36 c B –5 b B –32 b B 336 a A –29 b B 0 a B
SE§ 58
UTC, untreated control.
Means followed by the same letter—lower-case letter within column and upper-case within row—do not differ by the LSMEANS test (p > 0.05).
§Standard error of an interaction mean.



View Full Table | Close Full ViewTable 2.

Medicago shoot mass as affected by medic species × rhizobium inoculum interaction (p < 0.001) at 45 d after emergence. Data are means across three replicates and 2 yr (n = 6).

 
Rhizobium inoculum
Medic species M2 WSM1115 Nitragin N M49 Nitragin A UTC†
mg plant−1
Medicago arabica (L.) Huds. 57 a A‡ 50 a AB 39 a B 11 b C 17 abc C 10 a C
Medicago lupulina L. 49 a A 29 bc B 34 a AB 11 b C 22 ab BC 10 a C
Medicago minima (L.) Bartal. 22 b A 21 cde AB 15 bc ABC 6 b BC 8 bc ABC 3 a C
Medicago orbicularis (L.) Bartal. 42 a A 25 bcd BC 31 ab AB 7 b D 19 abc BCD 11 a CD
Medicago polymorpha L. 52 a A 38 ab AB 33 a BC 22 b CD 8 bc D 8 a D
Medicago rigidula (L.) All. 17 b AB 9 e B 12 c B 9 b B 27 a A 7 a B
Medicago rigiduloides E. Small 12 b B 13 de B 10 c B 49 a A 7 c B 10 a B
SE§ 10
UTC, untreated control.
Means followed by the same letter—lower-case letter within column and upper-case within row—do not differ by the LSMEANS test (p > 0.05).
§Standard error of an interaction mean.



View Full Table | Close Full ViewTable 3.

Medicago root mass as affected by medic species × rhizobium inoculum interaction (p < 0.001) at 45 d after emergence. Data are means across three replicates and 2 yr (n = 6).

 
Rhizobium inoculum
Medic species M2 WSM1115 Nitragin N M49 Nitragin A UTC†
mg plant−1
Medicago arabica (L.) Huds. 37 a B† 72 a A 12 a C 9 b C 13 a C 15 a C
Medicago lupulina L. 36 a A 23 b AB 15 a BC 9 b C 10 a C 8 a C
Medicago minima (L.) Bartal. 23 bc A 27 b A 18 a AB 7 b B 8 a B 5 a B
Medicago orbicularis (L.) Bartal. 33 ab A 18 b B 17 a B 7 b B 10 a B 8 a B
Medicago polymorpha L. 23 bc A 21 b AB 20 a AB 13 ab AB 7 a B 9 a B
Medicago rigidula (L.) All. 15 c A 8 c A 8 a A 7 b A 14 a A 5 a A
Medicago rigiduloides E. Small 13 c AB 8 c B 8 a B 25 a A 6 a B 9 a B
SE‡ 3
UTC, untreated control.
Means followed by the same letter—lower-case letter within column and upper-case within row—do not differ by the LSMEANS test (p > 0.05).
§Standard error of an interaction mean.



View Full Table | Close Full ViewTable 4.

Rhizobium effectiveness summary presented by medic species and rhizobium treatments at 45 d after emergence compared to an untreated control (UTC).

 
Rhizobia inoculum†
Medicago entry M2 WSM1115 Nitragin N M18 M49 Nitragin A RR1128 UTC
Effectiveness‡
Medicago minima (L.) Bartal.
Devine +‡ + + + + 0
499028 + + + + + 0
TAM-MM1 + + + + + 0
W6 19015 + + + + + 0
Medicago orbicularis (L.) Bartal.
Estes + + + + + 0
419238 + + + + + 0
SA 2161 + + + + + 0
W6 5206 + + + + + 0
Medicago rigidula (L.) All.
495552 + + 0
495462 + + 0
495523 + + 0
495555 + + 0
Medicago rigiduloides E. Small
227850 + 0
380919 + 0
495457 + 0
495464 + 0
Nitragin A and RR1128 are commercial alfalfa inocula.
+, effective pink nodules; –, ineffective white nodules; 0, no nodules.