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  Search result  Your search for [author]Farrol, Gerardo F. returned 2 records.  
 
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  Analytics My P2,000-Biogas digester saves me P5,000 a year.

by Farrol, Gerardo F.;

Subject: Biogas -- Digesters.

  
     
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  Thesis Fertilizer nitrogen requirement of direct seede rice in multiple cropped land.

by Farrol, Gerardo Forro.; 1980.

Subject: Rice -- Fertilizers and manures; Nitrogen fertilizers.

  
     
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