1. 1
   The effect of varying potassium, calcium, and magnesium levels on water content, transpiration rate, and the initial phase of development of frost hardiness of Pinus silvestris L....

   Por Christersson, Lars
   Publicado em 1973

   Stockholm : Royal College of Forestry, [1973]

   26 p. : ill. ; 25 cm.

   Assuntos: “...Conifers Fertilizers and manures....”
   

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2. 2
   The effect of varying potassium and calcium contents on water status and drought hardiness of pot-grown Pinus silvestris L. and Picea abies (L.) Karst. seedlings = Effecter [sic] a...

   Por Christersson, Lars
   Publicado em 1976

   Stockholm : Swedish College of Forestry, [1976]

   23 p. : ill. ; 25 cm.

   Assuntos: “...Conifers Fertilizers and manures....”
   

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