1. 1
   Urban organic waste in agriculture : risk or resource?

   av Johansson, Mats
   Publicerad 1999

   Uppsala [Sweden] : Swedish University of Agricultural Sciences, 1999.

   1 v. (various pagings) : ill. ; 24 cm.

   Ämnen: “...Organic wastes as soil amendments....”
   

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2. 2
   Population dynamics of bacteria introduced into bentonite amended soil

   av Heijnen, Caroline
   Publicerad 1992

   [1992]

   119 p. : ill. ; 24 cm.

   Ämnen: “...Soil amendments....”
   

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3. 3
   Ammonification of organic nitrogeneous fertilizer as a cause of ammonia injury to seedling plants and the effect of gypsum as a preventative

   av Rankin, William Houston
   Publicerad 1930

   1930.

   15 p. : ill. ; 29 cm.

   Ämnen: “...Gypsum as soil amendment....”
   

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