The purpose of this technical report is to clarify the morphology of the taproot of coffee seedlings and the distribution of the root system.The survey targets were two coffee farms located in a mountainous area far from the coast in northern Okinawa Prefecture. The area was surrounded by windbreaks, windbreak fences, and forests, and more than ten years had passed since they were planted.Then researchers collected the seedlings, examined their taproot morphology, and after nurturing them, investigated the distribution of their root systems.As a result, it was shown that the existence rate of seedlings with straight taproots was about 20-38%, that the morphology of the taproot did not change after nurturing, and that the elongation rate of the taproot was about 130% per year.And compared to before nurturing, the distribution of fine roots expanded laterally and in depth. The maximum width was 6 cm in diameter at a depth of 2 to 3 cm, and the depth was about 18 cm.Furthermore, the distribution of fine roots before and after growth showed that many fine roots existed in shallow areas.
