The study looked at how different ways of preparing soil in a tea garden affect the soil and tea production. They tested three methods: no tillage, rotary tillage, and deep tillage. Deep tillage was found to be the best method, reducing soil compaction and increasing water storage in the soil. Tea plants grown in deep tilled soil had higher yields compared to those in no tillage or rotary tillage. Overall, deep tillage was the most effective way to improve soil quality and increase tea production in the area studied.