The willpower from the dry mass of all substrate pots by drying in the ventilated oven at sixty°C (Heraeus, Hanau, Germany) for seven times firstly and finish of lettuce cultivation authorized the calculation on the mineralized natural matter through the experiment. This method was applied in accordance with the method https://coffeeprinting44186.bloggin-ads.com/56272510/the-ultimate-guide-to-greenhouse-accessories