The determination from the dry mass of all substrate pots by drying in the ventilated oven at 60°C (Heraeus, Hanau, Germany) for seven times originally and conclude of lettuce cultivation authorized the calculation from the mineralized organic matter over the experiment. This method was used in accordance with the system https://minivariablefrequencydriv54296.blog-eye.com/33181805/the-best-side-of-soilless-cultivation