EFFECT OF SPRA YING TIMES OF PLANT GROWTH REGULATOR ON YIELD OF TOMATO, តទ្ធីពលនៃ​ចំនួនដងនៃការបាញ់ថ្នាំជំរុញការលូតលាស់លើទិន្នផលដំណាំប៉េងប៉ោះ SUEM KAVEY, ស៊ឹម កវី AGR SUE 2019 B666 Or. Phnom penh RUA 2019 2019 Text x,35p, https://drive.google.com/file/d/1H_GsWTfbX5AGCiBpR6uAbKqkgWIc3L-V/view?usp=sharing