PHEAP, SAMBO <br/><br/>
Effect of direct seeding mulch-based cropping system on nitrogen content in the soil ឥទ្ទិពលប្រព័ន្ធដាំដុះលើដំណាំគម្របដីលើបរិមាណអាសូតក្នុងដី 

 - Phnom Penh  RUA  2010 
 - ix, 40p.  ill.  29cm. 
<br/><br/><label>Dewey Class. No.: </label>AGR PHE 2010 B046 Or.1