Question

question 6 (1 point)
if a soil test indicates a ph of 4.5, the soil is considered strongly ______ and may require lime application.

word bank:
acidic acidic potassium ammonium phosphorus mobile

·blank 1:

question 7 (1 point)
what is a primary environmental risk associated with excess phosphorus runoff?

a decrease in soil microbial activity
b eutrophication and algal blooms in waterways
c soil acidification
d rapid evaporation of groundwater

question 8 (1 point)
which ph range is considered optimal for the availability of most nutrients and beneficial microbial activity?

a 4.5 - 5.5
b 6.0 – 7.0
c 8.5 – 9.5
d 7.5 – 8.5

Explanation:

• Question 6: Soil pH < 7 is acidic; pH 4.5 is strongly acidic, and lime neutralizes acidity.
• Question 7: Excess phosphorus runoff fuels algal growth (eutrophication) in water.
• Question 8: Most nutrients and soil microbes thrive in slightly acidic to neutral pH.

Answer:

Question 6: acidic
Question 7: b. Eutrophication and algal blooms in waterways
Question 8: b. 6.0 – 7.0