%0 Journal Article %T Long short-term memory for a model-free estimation of macronutrient ion concentrations of root-zone in closed-loop soilless cultures %A Jung Eek Son %A Tae In Ahn %A Taewon Moon %J Archive of "Plant Methods". %D 2019 %R 10.1186/s13007-019-0443-7 %X A diagram of the closed-loop cultivation system used in this stud %K Environmental factor %K Hydroponics %K Machine learning %K Model-free estimation %K Paprika %U https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6540585/