
TY  - JOUR
A1  - Howieson, JG 
A1  - Ewing, MA 
T1  - Annual species of <I>Medicago</I> differ greatly in their ability to nodulate on acid soils
JF  - Australian Journal of Agricultural Research
JO  - Aust. J.  Agric. Res.
Y1  - 1989
VL  - 40
IS  - 4
SP  - 843
EP  - 850
KW  - 
UR  - https://doi.org/10.1071/AR9890843 
N2  - It is possible that the use of annual species of Medicago may be broadened by the selection of genotypes more capable of achieving nodulation on acid soils when only low numbers of their microsymbiont, Rhizobium meliloti, are present. In this study 36 genotypes from 14 species of Medicago were examined for their ability to nodulate over a range of inoculum levels in a soil of pH 4.9 (1:5,0.01 M CaCl2). Variation both within and between species was evident. M. murex in particular, as well as M. polyrnorphu and M. soleirolii, were outstanding in their ability to achieve nodulation in the acid soils. This character should assume some priority in pasture selection programmes targeted for acid soils. 
ER  -

