The authors note that work was conducted in a laboratory setting and that more research is needed to determine if what they observed in the laboratory also will occur under natural conditions. (sciencedaily.com)
In natural conditions, soil acts as a nutrient reservoir but the soil itself is not essential to plant growth. (sciencedaily.com)
So instead of rocking, tapping and performing other calming actions, it is better to create all necessary and natural conditions for the baby to fall asleep and sleep well. (bebezclub.com)