effect of different rates of potash (k2o) on growth and yield of ginger (zingiber officinale) ឥទិ្ធពលនៃកម្រិតប៉ូតាស់ផ្សេងៗគ្នាទៅលើការលូតលាស់និងទិន្នផលដំណាំខ្ញី (zingiber officinale) PHOEURN NARY,ភឿន ណារី AGR PHO 2017 B433 Or.1 RUA phnom penh 2016 2016 Text x;32p; https://drive.google.com/file/d/1HjU4KRYdNhKI-sSEmkuH3T6z416R7M_q/view?usp=sharing