Comparison of three wet digestion methods for the determination of plant sulfur by inductively coupled plasma atomic emission spectroscopy (ICP-AES).

abonos acide nitrique acido nitrico azufre deficiencia de minerales diagnosis diagnostic engrais exigence des plantes fertilizers inorganic acid salts inorganic acids mineral deficiencies mineralisation mineralization necesidades de las plantas nitrate de potassium nitrato de potasio nitric acid nutritive value plant requirements potassium nitrate soufre sulphur valeur nutritive valor nutritivo