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Effect of the availability of Si as Si(OH)4 in the irrigation water on the accumulation (A,C) and concentration (B,D) of silicon (as SiO2) in the tomato plant developed under a soilless cultivation system. 5 mg L−1 of Si(OH)4 (A,B) represent low availability of Si and 28 mg L−1 of Si(OH)4 represent adequate availability (C,D). For the simulation, 12 h of PAR and an average air temperature of 20°C were considered.
