First off, let me apologize for the very late answer. I have had very poor internet connection but have been keeping this question on my mind.

Well, TunTian (屯田) came about in full form during the Eastern Han dynasty and continued into the Three Kingdoms period in the state of Cao Wei (run by the descendants of Cao Cao). For the most part, settlement was encouraged as a way to provide for civilian families and gain land ownership. Additionally, while soldiers had previously been the main group of Tuntian, farmers grew to encompass the majority of the system. Most of what I can talk about though, are the agricultural systems preceding and following Tuntian.

From the Zhou dynasty to the end of the Warring States period and the unification under the Qin dynasty, there existed a system known as the JingTian ZhiDu (井田制度) or the "Well-Field System" with the plots of land (田) being demarcated to look like the character for well, Jing (井）thusly. The outer fields were worked by serfs privately and the inner field was worked communally and would go to the ruling aristocrat (a portion of which would be given to the king as tribute). The problem was, the whole system depended on aristocratic ties, and as ties weakened, tribute and efficiency of the system was strained. There was some minor attempts to restore the system after the Qin, but to no real avail.

Following the Han and the Three Kingdoms period, there were further agricultural reforms under the Tang, specifically under Tang Xuanzong; Xuanzong implemented the equal field system. Under this system, all land was under ownership of the Emperor, but was equally distributed to adult males between the ages of 17 and 59, and every three years the land was redistributed along these same guidelines. The land was free to be worked by the families that had been given possession, with the imperial tax consisting of 2-3% of the annual grain harvest per male head, and roughly 25 feet of silk woven by the women of the families. In addition to the imperial tax, each year males were subject to 20 days of working as labor for the central government, and 2 months of duty was to be given to the local government. During times of prosperity, the rules of the equal field system were adapted and changed in some amount. Emperor Xuanzong raised the age of taxation to 22 years old in 744, as well as exempting the 10 poorest families in every village from taxation in 746 (this later grew to encompass about 5% of the population). Furthermore, during the Tang dynasty the examination systems were further expanded and became a tool for social mobility, allowing a greater number of the population to participate in government on the local, provincial, and imperial levels.