PLANT SCIENCE FINAL EXAM

Anaerobic conditions will develop if the holes are farther than  ________ inches from the compost

• 18 inches

• 6 inches

• 12 inches

• 15 inches

You should add compost or garden soil to the compost.

• TRUE

• FALSE

The Johnson-Su Reactor Compost System is a good design because it is almost maintenance free, efficient in breaking down the organic matter and ________________________

• expensive to build

• difficult to build

• cheap to build

• uses a lot of space

What percentage of the world’s fresh water withdrawals are used for irrigation?

• 75 %

• 40 %

• 60 %

• 90 %

What is the efficiency percentage of flood or furrow irrigation?

• 50 %

• 30 %

• 98 %

• 10 %

What is the term for water held in the soil between field capacity and permanent wilting point?

• Water Tables

• Condensation

• Available water

• Rainwater harvesting

What percentage of water loss does an irrigation device which is only one to two feet from the ground have?

• 40 %

• 98 %

• 50 %

• 10 %

Insects are part of which phylum?

• Nematoda

• Arthropoda

• Crustacea

• Mollusca

Pathogenic pests can be classified as which of the following?

• Nucleic

• Mitochondrial

• Bacterial

• Chemical

Which is a characteristic of an insect?

• Two pairs of antennae

• Two body segments

• Four pairs of legs

• Two pairs of wings