The pe and pH Alfalfa Seedling Rhizospheres
1986
Blanchar, R. W. | Lipton, D. S.
Changes in pe and pH of alfalfa [Medicago sativa L.] rhizospheres may be important considerations in the description of nodulation and nutrient uptake. Growth chamber studies were done where alfalfa seedlings were grown into a Sharon sandy loam soil and in situ measurements of pH and pe in zones 0 to 0.5, 0.5 to 1, and 1 to 3 mm from root surfaces made. The pe of the soil 0 to 0.5 mm from lateral and main roots was 7.8 ± 0.05 and was the same as that of the soil at greater distances. The pH in the zone 0 to 0.5 mm from lateral roots was 4.2 ± 0.3, in the same zone near main roots 6.8 ± 0.4, and at distances greater than 3 mm it was 5.54 ± 0.9.
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