TROPICAL HORTICULTURE
Questions – Week 1
What three unique characteristics help influence the climate in the tropics?
What percent of the soils in the tropics is made of ultisols?
Which of the following soils tends to be the most fertile?
a) volcanic
b) ultisols
c) vertisols
d) alluvial
What can define the tropics?
a) the area between the Tropic of Capricorn and the Tropic of Cancer
b) 45% of the land mass of the planet
c) the highest longitude where the sun is overhead
d) all of the above
List the fertility level of the tropical soils, from most fertile to least fertile
a) oxisols, ultisols, volcanic, alfisols
b) alluvial, vertisols, aridosols, oxisols
c) ultisols, alluvial, volcanic, alfisols
d) aridosols, vertisols, ultisols, alluvial
The area known as the tropics is between what lines of latitude?
Whis of these is NOT one of the three characteristics which influence climate
a) high solar radiation
b) little seasonal variation in solar radiation
c) high seasonal variation in solar radiation
d) 75% of surface area is water
What percent of the world’s land mass is in the tropics?
Name three reasons the forest is being cut
At which point does solar radiation vary the most?
a) Equator
b) 20ºN
c) 40ºN
d) all vary the same
The area where tropical trade winds converge is known as the __________________________.
What are cultural factors that limit the development of agriculture in the tropics?
All of the following are found in the tropics except
a) high solar radiation
b) very dry climate
c) very wet climate
d) little seasonal variation in solar radiation
e) all are characteristics of the tropics
What percentage of perennial crops comes from the tropics?
a) 80%
b) 25%
c) over 50%
d) less than 5%
What unique characteristics influence the climate in the tropics?
a) high solar radiation
b) little seasonal variation in solar radiation
c) 75% of surface area is water
d) all of the above
What percentage of Earth’s land mass is in the Tropical Zone?
a) 42%
b) 23%
c) 76%
d) 38%
Which of the following characteristics would typically affect agricultural practices?
a) religious
b) individual
c) customs
d) tribal
e) all of the above
The best soil structure is from __________________, while the worst soil structure comes from
___________________ (what type of soil).
a) oxisols, ultisols
b) volcanic, vertisols
c) alfisols, vertisols
d) volcanic, ultisols
Which crops is NOT grown in the tropics?
a) potatoes
b) passion fruit
c) guava
tropics
TROPICAL HORTICULTURE – QUESTIONS WEEK 1 – PAGE 2
d) apples
e) coffee
f) all of the above crops are grown in the
What is the general range of climates in the tropics?
Of the world’s population, 44% resides in ______________.
a) North America
b) Europe
c) Africa (N)
d) the tropics
What is the tropics? What is the world’s percent land mass and population of this area?
Why is clear cutting the forests in the tropics so bad?
Give a brief explanation of why the Intellectual Property Rights are an important consideration
when collecting plants in the tropics.
What are two major global effects of deforestation due to burning forests?
What is a drawback of having a tenant farmer system?
What classification of soil predominates in dry regions with little weathering?
What is one disadvantage to volcanic soils?
What are the main classification points of defining the tropical climates?
What is the Northern boundary of the area known as the tropics?
a) Prime Meridian
b) Tropic of Cancer
c) Equator
d) Tropic of Capricorn
How much of the world’s biota is in the tropics?
a) 40%
b) 25%
c) 50%
d) 75%
What type of soil is most common in the tropics?
a) oxisols
b) alfisols
c) vertisols
d) alluvial
What are the three major soil types found throughout the tropics?
TROPICAL HORTICULTURE – QUESTIONS WEEK 1 – PAGE 3
Between what regios can the tropics be considered to be?
a) the Tropic of Cancer and the Equator
b) the Tropic of Capricorn and the Equator
c) The Tropic of Cancer and the Tropic of Capricorn
d) 23.5 degrees north latitude and 23.5 degrees south latitude
Which of the following fruits/vegetables are found in a tropical zone?
a) tomatoes
b) potatoes
c) tobacco
d) all of the above
Which of the following is a characteristic of VERTISOLS?
a) little leaching
b) no droughts or tilling problems
c) having low bases status
d) cracks when dry
True or False – The Equator has high solar radiation with little seasonal variation.
Compared to the age of temperate soils, tropical soils are ______________.
Which of the following is positively correlated to the water holding capacity of air:
a) rainfall
b) air temperature
c) solar radiation
d) air flow
Briefly, tell me what are the tropics.
What is the main reason the tropical forest is being cut?
a) forestry
b) people
c) development
d) agriculture
Describe a tropical climate.
What is the difference between tropical and temperate zone soils?
Which is not a GLOBAL effect of deforestation?
a) may increase rate of global warming
b) enhances greenhouse effect
c) climate changes due to removal of natural vegetation
d) carbon dioxide is related to atmosphere
TROPICAL HORTICULTURE – QUESTIONS WEEK 1 – PAGE 4
Which tropical zone soil has low pH, low CEC, low fertility, and covers 25% of the Earth?
Where on the Earth’s surface does the solar radiation stay at an almost steady level?
What kind of soil originates from river flood plains and is also very fertile?
What are the estimates in regenerating clear cuts of forested areas (in number of years)?
Which of the following is NOT TRUE about the tropics?
a) land area that is defined by position of the sun
b) the tropics are 100% rain forest
c) 38% of the Earth’s land mass is in the Tropical Zone
d) 55% of the world’s population is in the tropics
Which of the following determine climate?
a) solar radiation
b) surface receiving solar radiation
c) Earth’s rotation
d) land/sea configuration and topography
e) all of the above
In the tropics, what percentage of the population is involved in agriculture?
a) 9%
b) 44%
c) 20%
d) 90%
What are the estimates in regenerating selective cuts of forested areas?
a) 5-10 years
b) 20-50 years
c) 60 years
d) 100 years
Which is NOT an effect of deforestation?
a) soil degradation
b) climate changes
c) neighborhood crime
d) loss of habitat
What two factors drive the climatic system in the tropics?
Where do trade winds meet?
a) Equator
b) Intertropical Convergence Zone (ITCZ)
c) Cancun, Mexico
d) Tropic of Capricorn
TROPICAL HORTICULTURE – QUESTIONS WEEK 1 – PAGE 5
True or False – The three unique characteristics that influence climate in the tropics are high
solar radiation, little seasonal variation in solar radiation, and 75% of the surface area is water.
Rainfall in the tropics average
a) 0-40 inches
b) 10-40 inches
c) 0-100 inches
d) 0-400 inches
What is Millie’s dog named?
a) Bob
b) Joe Bob
c) Billy Bob
d) Budha Bob
True or False – Land/sea configuration and topography are determinants of climate.
What happens in the Intertropical Convergence Zone?
Aridisols have potential for agriculture but may have too much sodium accumulated. What can
be done to help this problem?
What percent of surface area in the tropics is made up of water?
What type of tropical soil is considered old and not very fertile?
Which type of soil is known for cracking?
Name three reasons why tropical forests are being cut down.
54% of land area is considered old landscape soils. Which of the following is NOT considered an
old landscape soil?
a) alfisols
b) aridisols
c) ultisols
d) oxisols
Which of the following are the three LEAST fertile types of the tropical soils?
a) ultisols, alfisols, and vertisols
b) oxisols, aridisols, and vertisols
c) alfisols, aridisols, and alluvials
d) oxisols, ultisols, and alfisols
What are some of the effects of tropical deforestation?
TROPICAL HORTICULTURE – QUESTIONS WEEK 1 – PAGE 6
Which climate type is NOT important in the tropics?
a) semiarid
b) temperate wet
c) tropical wet
d) desert/arid
What is the name of the latitude line with the coordinate 23.5ºN?
a) Tropic of Cancer
b) Equator
c) Tropic of Gemini
d) Tropic of Capricorn
Which is NOT a characteristic of a vertisol?
a) cracks when dry
b) low pH
c) good fertility
d) high in montmorillonite
TROPICAL HORTICULTURE – QUESTIONS WEEK 1 – PAGE 7