The study looked at how different densities of Robinia Pseudoacacia trees affect their water content and transpiration rates during the peak season. They found that trees with higher density had lower leaf water content but higher transpiration rates. The root water potential was higher than leaf water potential, and the difference between them was related to transpiration rate. The soil water content decreased with increased tree density. Overall, a density of 1800 trees per hectare was found to be the best for effective water use and growth.