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18 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Poor health condition caused by not consuming enough necessary food.
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What is Malnutrician? p228
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Ex. Prevalent in Bangladesh, Sri Lanka, & 3rd world countries. Poor agriculture is one cause.
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A period when rainfall is less than average, causing crop failure.
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What is Drought? p229
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Ex. One of the causes of the 7 plagues of Egypt during the Exodus of Jews by Moses.
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A widespread food shortage.
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What is Famine? p.229
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Ex. One the results of Drought or Locusts.
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The amount of crops produced per unit area of land.
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What are Yields? p.229.
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Ex. Increases with modern farming methods & good weather.
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Farmers who grow only enough food for their family.
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What are Subsistence Farmers?
p229 |
Has low yield due to not using chemicals & modern equipment and methods.
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Fertile land that can be plowed to grow crops.
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What is Arable Land? p.231
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The shortage of this threatens our ability to feed the human population.
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The loose surface layer of soil.
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What is Topsoil? p. 232
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Soil where roots of plants grow composed of rock particles, water, air, and organic matter.
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The wearing away of topsoil by wind and water.
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What is Erosion? p.234
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About one-half of the topsoil in the U.S.A. has been lost to this in the last 200 yrs.
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The clearing of trees from an without replacing them.
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What is Desertification? p235.
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Worldwide an area the size of Nebraska becomes desert-like by this process annually.
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A procedure in which the seeds of the next crop are planted in slits cut into the soil through remains of the previous crop.
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What is No-Till Farming? p.237
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Uses refuse of old crop to rot providing nutrients for new crop
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Farming that does not use a lot of energy, pesticides, fertilizer, and water
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What is Low Input Farming?
p.238 |
Ex. Organic Farming w/o pesticides or synthetic chemicals replacing it with organic matter (manure, compost); Fish-farming
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Any organisms that are not wanted or that exists in large enough number to cause damage.
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What is a Pest? p.240.
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Ex. Locusts, caterpillars, bees, fungus, rats, weeds, insects, et.al.
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A substance that kills pests.
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What is a Pesticide? p.241.
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Ex. DDt, Lindane, Carbayl, Zectran , et.al.
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The ability of the pest population to tolerate a particular pesticide.
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What is Tolerance? p.241.
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Eolving by genetic mutation to resist pesticides.
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Pest control using living organisms or naturally produced chemicals.
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What is Biological Pest Control? p.243.
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The bacteria Bacillus thuringensis can contro Gypsy Moth caterpillars.
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Disease-causing organisms , such as bacteria, viruses, and parasites.
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What are Pathogens? p. 244
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Bt or Bacillus thuringensis is an example used to kill the Gypsy Moth caterpillar.
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Soil that supports the rapid growth of healthy plants.
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What is Fertile Soil? (232)
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Composed of rock particles, water air, and organic (humus,peat, dead animals/plants) matter,& animal excrement (manure).
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The accumulation of salts in the soil.
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What is Salination? (238)
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Due to over irrigation of land leaving salts behind in soil when the water evaporates or by causing the groundwater to rise up depositing salts.
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