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DSST Env.Sci. Chp. 9

vocab. for DSST Env.Sci. from Environmental Science by Karen Arms

amaranth plant that can survive with little water, producing a grainlike fruit rich in protein
aquaculture cultivation of fish for human use or consumption
arable land fertile land that can be plowed to grow crops
biological pest control pest control using living organisms or naturally produced chemicals
carbohydrate organic compound, such as starch or sugar, made of carbon, hydrogen, and oxygen in which the ratio of hydrogen to oxygen is 2:1
contour plowing plowing across the slope of a hill to prevent soil from being washed away
drought period when rainfall is less than average, causing crop failure
erosion the wearing away of topsoil by wind or water
famine widespread food shortage
fertile soil soil that can support the rapid growth of healthy plants
genetic engineering scientific activity that develops desirable characteristics in an organism by altering its genes or inserting new genes in the organisms cells
green revolution the introduction of new farming techniques and new varieties of crops, especially grains, in Asia and Latin America
lipid organic compound that contains fats and other substances that living organisms use to get energy
low-input farming farming that does not use a lot of energy, pesticides, fertilizer, and water
malaria infectious disease carried by mosquitoes
malnutrition poor health condition caused by not consuming enough necessary nutrients
no-till farming procedure in which the seeds of the next crop are planted in slits cut into the soil through the remains of the previous crop
organic farming method of growing plants without synthetic pesticides or fertilizers
pest any organism that is not wanted or that exists in large enough numbers to cause damage
pesticides substances that kill pests
pheromone chemical substance secreted externally by certain animals that conveys information to and produces certain responses in other animals of the same species
protein group of organic compounds used for food by living organisms and contained in meats and dairy products
resistance the ability of a pest population to tolerate a particular pesticide
salinization the accumulation of salts in the soil
subsistence farmers farmers who grow only enough food to feed their families
synthetic fertilizer fertilizer produced in factories and used in place of manure and plant wastes
topsoil loose surface layer of soil
typhus infectious disease carried by lice
yield amount of crops produced per unit area
Created by: pinetreeacademy