comparison of different seedling ages on chinese kale growth and yield on sandy soil ការប្រៀបធៀបកូនដំណាំខាត់ណាដើមខុសៗគ្នាលើការលូតលាស់និង​ទិន្នផលលើដីល្បាយខ្សាច់ YANA MEY យ៉ាណា មុី AGR YAN 2017 B633 Or.1 phnom penh RUA 2017 2017 Text x;36p https://drive.google.com/file/d/17r5bZn15Ekao3Phk20Vob04pxc062T5q/view?usp=sharing