Hirotomo Satou

Online Kihon Geiko of Kudo 3 (2025/12/6)

Online kihon geiko of Kudo 1(2025/11/23)

Online kihon geiko of Kudo 2(2025/11/30)

CEC និង Base-cation saturation ratio

CEC and Base-cation saturation ratio

លក្ខណៈដីលើពិភពលោក(World soil characteristics)

World soil characteristics