Treatments

N (1 L 25 mM NH4Cl)

N + P + K + S (1 L 25 mM NH4Cl, 20 mM Na3PO4, 4 mM KCl, plus 50 mM Na2SO4)

K (1 L 4 mM KCl)

S (1 L 50 mM Na2SO4)

P + S (1 L 20 mM Na3PO4, plus 50 mM Na2SO4)

P (1 L 20 mM Na3PO4)

N + S (1 L 25 mM NH4Cl plus 50 mM Na2SO4)

N + P + K (1 L 25 mM NH4Cl, 20 mM Na3PO4, plus 4 mM KCl)

P + K (1 L 20 mM Na3PO4, plus 4 mM KCl)

Control (untreated)

0.1% N-Carboxymethyl Chitosan solution.