Looking for something authoritative.
Wikipedia has the following
Commentators generally assume that the law was good agricultural practice, and that early harvesting would conflict with careful cultivation and pruning during the first three years in order to insure later good harvests and allow maturing of the trees. Grape vines produce fruit in three to six years, almond trees produce some flower buds in the fourth year and some fruit in the fifth, and sources from the Ancient Near East suggest that a good crop of dates was expected in the fourth year. In discussing the commandment that the fruit could not actually be eaten until the fifth year, Rooker (2000) notes that in the Code of Hammurabi a tenant-gardener could not eat of the fruit of an orchard until the fifth year, when he shared the produce with the owner.
Have there been any (scientific) studies that prove the benefits of Orlah? (i.e.: proof of what the Bible commentators above mentioned.)
What is the reasoning behind Orlah prohibition?