Soil, plant, water and fertilizer analysis 
P.K. Gupta. 
 - Bikaner  Agro Botanica  2000 
 - xv, 438p., ill.; 22cm. 
<br/><br/><label>ISBN: </label>81-87167-25-4. 
<br/><br/><label>Dewey Class. No.: </label>631.4  / G96S