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    Benoit Jaillard

    The release of nonexchangeable potassium by the different particle size fractions of two soils was studied with a culture device designed to confine soil samples in the rhizosphere of rape (Brassica napus cv Drakkar). After 8 days of... more
    The release of nonexchangeable potassium by the different particle size fractions of two soils was studied with a culture device designed to confine soil samples in the rhizosphere of rape (Brassica napus cv Drakkar). After 8 days of cropping, the contribution of nonexchangeable K to K uptake ranged from 50% in the fine clay to 80–100% in the coarser fractions.
    Grain legumes can contribute to cropping systems through their ability to fix nitrogen from air. However, the symbiotic nitrogen fixation process requires additional phosphorus in plant for optimal nodule formation and N2-dependent crop... more
    Grain legumes can contribute to cropping systems through their ability to fix nitrogen from air. However, the symbiotic nitrogen fixation process requires additional phosphorus in plant for optimal nodule formation and N2-dependent crop growth. Thus, P-deficiency limits the ...