QUIZ ON LIMING

(12)1. List three benefits of liming soils to correct of soil acidity.

a.________________________________________________________________________________________

b.________________________________________________________________________________________

c.________________________________________________________________________________________

(8)2. For one of the benefits listed above, describe how this benefit contributes to an increase in soil fertility.

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(16)3. Comment on the value of each of the following materials as limes to correct the nutritional difficulties that occur with plants growing in acid soils.

a. Calcite (CaCO3) __________________________________________________________________________

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b. Dolomite________________________________________________________________________________

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c. Quicklime_______________________________________________________________________________

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d. Wood ashes______________________________________________________________________________

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(12) Define these terms.

a. Soil acidity______________________________________________________________________________

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b. Reactivity of limestone_____________________________________________________________________

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(12) 5. Why is the lime requirement to raise a clay loam from pH 5.5 to pH 6.5 usually larger than that required to raise the pH of a sandy loam from pH 5.5 to pH 6.5.

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(24)6. Describe a process through which each of the following activities lead to soil acidification.

a. Leaching ________________________________________________________________________________

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b. Additions of organic matter to soil ___________________________________________________________

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c. Microbial activity _________________________________________________________________________

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(16)7. Evaluate the following practices of utilization of limestone on land.

a. Application of limestone to the surface of the soil then plowing the limestone into the soil._______________

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b. Selection of coarse limestones to diminish the frequency of limestone applications to land.

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