PHEAP, SAMBO. <br/><br/>
Effect of direct seedling mulch-based cropping system on nitrogen content the soil ឥទ្ធិពលប្រព័ន្ធដាំដុះលើដំណាំគម្របដីលើបរិមាណអាសូតក្នុងដី 

 - Phnom Penh  RUA  2010 
 - ix; 40p.  ill.  29cm. 
<br/><br/><label>Dewey Class. No.: </label>AGR PHE 2010 B044 Or.1