ONG, PISETH. <br/><br/>
effect of wood vinegar on nutrient release from cow dung (ឥទ្ធិពលនៃទឹកខ្មេះឈើលើការបញ្ចេញសារធាតុចិញ្ចឹមពីលាមកគោ) 

 - Phnom Penh  RUA  2009 
 - xii, 58p.  ill.  29cm. 
<br/><br/><label>Dewey Class. No.: </label>AGR ONG 2009 B042 Or.1