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  Search result  Your search for [author]Barrera, Alfredo returned 10 records.  
 
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  Book Principles of soil science.

by Barrera, Alfredo; [S.l: s.n.], 1977.

Subject: Soils.

  
     
Relevance: 20.24%
 
     
  Book The soil around us.

by Barrera, Alfredo; [S.l.: Communications Media Division, U.S. Agency for International Development, 1960.

Subject: Soils.

  
     
Relevance: 16.46%
 
     
  Book The soil around us.

by Barrera, Alfredo; Manila, Philippines: Bureau of Soils, 1960.

Subject: Kind of soils; Soil structure; Soil texture; Characteristics of soils; Micro-organisms in soil; Organic matter; Soil moisture; Kind of soil formation; Soil fertility and fertilizer; Soil acidity and liming; Soil classification; Soil erosion and its maladies; Soil depletion; Kinds of soil erosion; Control of soil erosion; Soil conservation; Crops affect soil fertility; Ideal soil; Land capability; Conservation surveys.

  
     
Relevance: 16.46%
 
     
  Book The Soils around us.

[S.l.: Bureau of Soils.

  
     
Relevance: 15.75%
 
     
  Book Soil survey of Negros Oriental province, Philippines.

Manila: Bureau of Printing, 1960.

Subject: Soils -- Negros Oriental -- Maps.

  
     
Relevance: 15.58%
 
     
  Book Soil survey of Isabela province, Philippines.

Manila: Bureau of Printing, 1969.

Subject: Soils -- Isabela -- Maps.

  
     
Relevance: 15.58%
 
     
  Book Soil survey of Cebu Province, Philippines.

Quezon City: DANR, 1954.

Subject: Soils. -- Cebu -- Maps.

  
     
Relevance: 15.26%
 
     
  Book Soil survey of Leyte Province.

Quezon City: DANR, 1954.

Subject: Soils. -- Leyte.

  
     
Relevance: 15.26%
 
     
  Book Soil survey of Negros Occidental Province, Philippines.

Quezon City: DANR, 1952.

Subject: Soils. -- Negros Oriental -- Maps.

  
     
Relevance: 15.26%
 
     
  Book The Soil around us.

[Manila: Communications Media Division, U.S. Agency for International Development.

Subject: Soils.

  
     
Relevance: 15.10%
 
     
 
         
         
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