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residual effects of applied chemical fertilisers on growth and seed yields of sunflower (helianthus annuus cv. high sun 33) after the harvests of initial main crops of maize (zea mays l.), soybean (glycine max l.) and sunflower (helianthus annuus).the experiments consisted of two locations, i.e., the first one was carried out on a growers's upland area at saraburi province, central plane region of thailand with the use of chatturat soil series (typic haplustalfs, fine, mixed) and the second experiment was carried out at suranaree technology university experimental farm, suranaree technology university northeast thailand with the use of korat soil series (oxic paleustults). the experiments aimed to investigate the effect of residual effect ...200719069898
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