ENS241 QUIZ module 1

The advantages of no-tillage farming include all of the following EXCEPT increased

• crop yield

• soil erosion

• organic matter in the soil

• water-holding capacity of the soil

Environmentally sustainable practices in agricultural systems do NOT include

• agroforestry

• chemical pest control

• contour farming

• terracing

The use of inorganic fertilizers causes environmental problems because they

• are quickly leached out of the soil by rain

• are slower acting and longer lasting

• do not provide the soil with humus

• have variable composition

Which of the following is NOT associated with organic farming?

• Biological pest control

• Crop rotation

• High-yield polyculture

• Soil salinization

Which of the following is NOT an effect of the continuous use of fertilizers?

• Decreased soil mineral content

• Few organisms in the soil

• Poor crumb structure of soil

• Reduced soil humus content

Which of the following techniques uses naturally occurring disease organisms or predators to control pests?

• Genetic control

• Biological control

• Biological magnification

• Genetic engineering

In the practice of sustainable agriculture, which of the following is an important feature of ecological integrity?

• Farmers produce enough for self-sufficiency.

• Resources are distributed to meet the basic needs of all community members.

• Resources are used in a manner to minimize the loss of nutrients, energy and biomass.

• The yield of the produce justifies the inputs.

Which of the following is/are true of subsistence agriculture?

I. It is practised in areas of low population density in rainforest environments. II. It requires low levels of inputs of agrochemicals to maintain yields. III. It uses mechanized equipment in its operations.

• I only

• I and II only

• I and III only

• II and III only

Which of the following statements is NOT TRUE of organic fertilizers?

• I only

• II only

• I and II only

• I, II and III

Which of the following is NOT a feature of sustainable agriculture?

• Social equity

• Political equity

• Economic viability

• Ecological integrity