
TY  - JOUR
A1  - Robson, AD 
A1  - Loneragan, JF 
T1  - Nodulation and growth of <I>Medicago truncatula</I> on acid soils.  I. Effect of calcium carbonate and inoculation level on the nodulation of <I>Medicago truncatula</I> on a moderately acid soil
JF  - Australian Journal of Agricultural Research
JO  - Aust. J.  Agric. Res.
Y1  - 1970
VL  - 21
IS  - 3
SP  - 427
EP  - 434
KW  - 
UR  - https://doi.org/10.1071/AR9700427 
N2  - On a moderately acid soil (pH 4.6 in 115 suspension of soil in 0.01M calcium chloride), nodulation of Medicago truncatula cv. Cyprus responded markedly to increasing applications of calcium carbonate, which increased soil pH. Since the effect of increasing soil pH on the percentage nodulation could be replaced to a large extent by increasing the inoculation level, it appeared that nodulation was restricted by the inability of Rhizobium meliloti to survive or multiply in the acid soil. The growth of R, meliloti appeared more sensitive to soil acidity than growth of the host plant of annual Medicago species. It is suggested that more acid-tolerant strains of R. meliloti would permit annual Medicago species to be grown successfully on moderately acid soils, thus extending the range of soils suitable for the growth of these species. 
ER  -

