2.7.1. Elements content analysis

A well-known mass of the powdered quantifiable of yielded common beam seeds for each treatment was assimilated in a ingestion flask encompassing a three acid mixture (HNO₃: H₂SO₄: 60% HCl₄, with a ratio of 10:1:4; respectively). Nitrogen was dignified by Kjeldahl technique (Nelson and Sommers, 1973). Phosphorus was gritty resulting ammonium molybdate b1ue Technique . Potassium and sodium were evaluated by a flame spectrophotometer (Corning 400, UK), and calcium (Ca) and magnesium (Mg) were determined using atomic absorption by the technique of Allen (1989).