Testing on PGPR-3 and Fertilizers Yield, Starch percentage and Economic viability of Cassava on Group of Soil Series No.40 in Uttaradit Province
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Abstract
The study was a test of nutrient management combined with the use of PGPR-3 biofertilizer on group soil series No. 40. The field experiment was conducted in Thong Saeng Khan and Phichai district, Uttaradit province, on 10 cassava farm plots. The experiment consisted of two treatments: 1) the use of PGPR-3 bio-fertilizer combined with 75 % chemical fertilizer according to soil analysis, and 2) the farmer’s method using chemical fertilizer according to soil analysis. The experiment was conducted from June 2022 to March 2023 and from July 2023 to April 2024. Results showed that the fresh root yield and the fresh roots starch content were significantly different. Application of PGPR-3 bio-fertilizer combined with 75 % chemical fertilizer resulted in a 13% increase in fresh root yield. It also increased the starch content in cassava roots and the height of the cassava plants compared to the farmer's method. Cassava farmers net income increased by 33 % and the benefit-cost ratio (BCR) increased by 13 % compared to the farmer’s method.
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