The most active agent of physical weathering in arid regions is
Wind
Water
Temperature
Ice
Correct answer is C
A region is arid when it is characterized by a severe lack of available water,and high temperature to the extent of hindering or preventing the growth and development of plant and animal life.
Plant breeders aim at obtaining the following except
Tolerance to climatic extremes
Resistance to pests
Adaptation of pollination
Uniformity in the time of maturity
Correct answer is C
Plant breeding is the science of changing the traits of plants in order to produce desired characteristics, such as tolerance to bad climatic condition,early maturity and resistance to pest and diseases.
Which of the following is not a characteristic of a good pasture?
High quality grass
Provision of balance nutrients
Ability to withstand trampling
High stem to leaf ratio
Correct answer is A
A good pasture has low quality grass.
Pasture crops are best used in preparing hay
When they are two weeks old
Just before flowering
Just after seed maturation
After they have started to dry up
Correct answer is C
After seed maturation they are cut and then converted to Hay. Hay is grass, legumes, or other herbaceous plants that have been cut and dried to be stored for use as animal fodder, particularly for large grazing animals raised as livestock.
Andropogon gayanus is commonly called
Guinea grass
Elephant grass
Gamba grass
Spear grass
Correct answer is C
Gamba grass is a pasture.
Andropogon gayanus
Andropogon gayanus is a species of grass native to most of the tropical and sub-tropical savannas of Africa.