@book{1109,
	author = {OUK, AKHARA.},
	title = {effect of direct seeding mulch based cropping system on soil physical properties (ឥទ្ធិពលនៃប្រព័ន្ធដំាដុះដំណាំគំរបដី ទៅលើលក្ខណៈរូបសាស្រ្តដី)},
	publisher = {RUA},
	year = {2010},
	address = {Phnom Penh}
}