Information from 2001 Missouri Rice Research Update, February 2002.

Table 4. Soil chemical and physical property characterization for corn grown after soybeans, drill-seeded rice and water-seeded rice.
        ---Exchangeable Cations---  
Previous crop pH SOM Phosphorus Ca Mg K CEC
    % lbs P/ac ---------cmolp(+) ·kg-soil-1---------
               
Soybeans 6.4 2.7 59 9.86 3.31 0.36 14.11
Drilled rice 6.8 2.3 46 7.66 2.99 0.36 11.65
Water-seeded 7.0 1.9 27 9.53 3.11 0.33 13.87

SOM = soil organic matter by loss on ignition.

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