/l/ Data represent the total amount present. /2/ Calcium x 1.5992 = calcium oxide, CaO. /5/ Magnesium x 1.6579 = 

 magnesium oxide, MgO. /U/ Nitrogen x 6.0683 = sodium nitrate, NaNOj. /5/ Phosphorus x 2.291U = phosphorus pent- 

 oxide, PgO^. /6/ Potassium x 1.20U6 = potassium oxide, KgO. /7/ Sulfur x 2.U969 = sulfur trloxide, SO5./8/ Grams 

 of calcium carbonate, CaCOj, required to neutralize the soil acidity resulting from the use of 100 grams of the ferti- 

 lizer material. /9/ Grams of calcium carbonate that correspond in acid -neutralizing power to 100 grams of the ferti- 

 lizer material. That is, a material having an alkallnlzlng action of 20, e.g., bone meal. Indicates that 100 grams of 

 this material applied to the soil would be equivalent to 20 grams of calcium carbonate for neutralizing soil acidity. 

 /lO/ The material is acidic, /ll/ The material is basic. /l2/ Some peats are acidic, others basic. 



104 



