Corn yield comparison between direct seeding mulch-based croping swystem and traditional practice ប្រៀបធៀបប្រព័ន្ធដាំដុះដោយផ្ទាល់លើដំណាំគម្របដី និងការដាំដុះតាមទម្លាប់ទៅលើទិន្នផលពោត YAR, SOPHAL. AGR VAR 2011 B049 Or.1 Phnom Penh RUA 2011 2011 Text viii, 39p. https://drive.google.com/file/d/1GZN1cnY5euH_w7bmFDfjjP3rs7GlBMYw/view?usp=sharing