Legumes are important for energy crops because they _______________ nitrogen in the soil.
Fill in the blank(s) with the appropriate word(s).
Question 2_______________ means that same amount of carbon that is produced by its combustion is then absorbed from the atmosphere by the growth of the plants comprising the energy crop.
Fill in the blank(s) with the appropriate word(s).
Question 3After the establishment of the energy crop, the organic material content of the soil also begins to increase. This helps to prevent soil loss to _______________.
Fill in the blank(s) with the appropriate word(s).
Question 4Woody biomass crops provide for increased animal _______________ within perennial fields.
Fill in the blank(s) with the appropriate word(s).
Question 5The combustion of biomass results in an almost complete reduction of ____ emissions.
a. sulfur oxide c. carbon monoxide
b. coal d. particulate
Question 6Nutrients in the form of nitrates and phosphates within water can lead to ____.
a. cultural eutrophication c. acid precipitation
b. monocultures d. runoff
Question 7The term sustainable means to ____.
a. keep up with future needs c. ensure a safe environment
b. maintain at a constant level d. produce at increasing rates
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