Chapter seven

Why are undernourished children from undernourished parents common?

Because undernourished parents cannot afford to feed their children properly.      

CHAPTER 7, p. 153

What two eye conditions are vitamin A deficiency linked to?

Dry eyes and retinal degeneration.

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CHAPTER 7, p. 154

What two diseases are linked to protein deficiencies?

Marasmus and kwashiorkor.

CHAPTER 7, p. 154

In what regions does wind erosion primarily cause problems?

In open, arid regions.

CHAPTER 7, p. 162


Soil salinization and acidification are examples of…

chemical deterioration of soil.

CHAPTER 7, p. 163

What causes waterlogging?

Excessive irrigation.

CHAPTER 7, p. 163; Glossary, p. 388

How much LESS energy is needed to directly farm crops in the United States, versus the amount used to actually process and distribute it?


(In other words, it takes five times as much energy to process and distribute food as the amount used to directly in farming.)

CHAPTER 7, p. 164   


What has caused recent increases in agricultural productivity in developing nations?

New crop varieties and intensified farming.

CHAPTER 7, p. 165

What causes the high yields in high responder green revolution miracle crops?

Fertilizers, pesticides, and irrigation.

CHAPTER 7, p. 166

What is likely to happen as wheat farmers rely on fewer new species?

1. An epidemic of wheat disease

2. Old wheat varieties are lost

3. Genetic resources are diminished

CHAPTER 7, pp. 166-167

What farming techniques prevent water and soil loss?

Contour plowing and strip farming.

CHAPTER 7, p. 169; Glossary p. 380

What is the most sustainable land use in tropical forests?

Periodic mixed (swidden or slash-and-burn) agriculture.

CHAPTER 7, p. 170

What type of farming is cheaper and safer than conventional farming?

Sustainable farming.

CHAPTER 7, pp. 168 & 171-172