quizone

(18)1. Comment on the following factors as components of soil fertility.

a. Soil chemistry _________________________________________________________________________

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b. Soil physics ___________________________________________________________________________

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c. Soil biology ___________________________________________________________________________

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(18)2. List three criteria that are required for a chemical element to be a plant nutrient.

a. _____________________________________________________________________________________

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b.______________________________________________________________________________________

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c.______________________________________________________________________________________

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(14)3. Define the term "mineralization of a nutrient". ____________________________________________

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What is the importance of mineralization to an organic farmer? ____________________________________

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(18)4. Comment on organic fertilizers with respect to the following characteristics.

a. Concentration of nutrients ________________________________________________________________

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b. Solubility of nutrients ___________________________________________________________________

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c. Availability of nutrients __________________________________________________________________

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(14)5. Identify the following terms by definition.

a. Grade of fertilizer (analysis)_______________________________________________________________

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b. Nutrient ion ___________________________________________________________________________

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(18 )6. Comment on the truth of the following statements.

a. Once upon a time all farmers were organic farmers. ____________________________________________

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b. All naturally occurring substances (rocks, minerals, plant-derived or animal-derived products) are universally identified as being organic fertilizers.

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