Lecture 10

Question 1

Biomass sources that are abundant, reliably produced, and renewable/sustainable

Answer 1

Dedicated crops, agricultural waste, algae

Question 2

Dedicated crops

Answer 2

Those that have no other purpose than to be used for a particular bioenergy process

Question 3

Why is corn not a dedicated bioenergy crop

Answer 3

It has multiple purposes (DDGS, ethanol from starch, etc.)

Question 4

Energy balances of dedicated crops

Answer 4

Lots of energy out and little energy in

Question 5

Qualities of popular dedicated crops

Answer 5

Low maintenance, perennial, high-yielding plants

Question 6

Fastest growing, most productive commercial trees in the USA

Answer 6

Hybrid poplar

Question 7

Poplar species that are hybridized

Answer 7

Deltoides, nigra, tremula, tremuloides

Question 8

How are hybrid poplars typically grown

Answer 8

Vegetative propagation using stem cuttings

Question 9

What are willows closely related to

Answer 9

Poplar

Question 10

How are willow planted

Answer 10

Like poplar (cuttings)

Question 11

Popular bioenergy grass

Answer 11

Miscanthus giganteus

Question 12

Where is M. giganteous native to

Answer 12

Japan

Question 13

How is M. giganteous planted

Answer 13

Rhizomes (horizontal stems), but you can purchase seedlings w/ a custom planter

Question 14

Is M. giganteous perennial

Answer 14

Yes

Question 15

Where is switchgrass native to

Answer 15

North America (Illinois)

Question 16

Is switchgrass perinneal

Answer 16

Yes