Optimizing Sweet Potato (Ipomoea batatas L.) Yields in Restricted Growing Area

Abstract

Study on the Evaluation of Yield and Quality of Four Japanese Sweet Potato Varieties Grown in a Limited Area as Basic Data to Promote Growth and Yield. A completely randomized experiment with four replications was conducted in the field Training Farm, Faculty of Agriculture, Ubon Ratchathani University, from February to May. The study focused on four Japanese sweet potato varieties: Purple Sweet Road, Silk Sweet, Purple Okinawa Kugami Imo, and Yellow Kiaro Imo. These varieties were tested in the Roi Et soil series. The results showed that the sweet potato varieties exhibited different yields. The accumulated heat units ranged from 1372.6 to 1377.7 GDD. Among the varieties, Purple Sweet Road responded best to the planting area, producing the highest tuber yield of 2348.80 grams per pot. Regarding physical evaluation, the tubers had an elongated shape and size, with firmness values ranging from 12 to 13 Newtons. The peel and flesh color values differed significantly among the four sweet potato varieties. The findings suggest that Purple Sweet Road has the potential to achieve high yields even in a limited planting area.