Test your basic knowledge |

Subject : agriculture
  • Answer 35 questions in 15 minutes.
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  • Match each statement with the correct term.
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This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Chemical compounds that persist in the environment and retain biological activity for long times

2. An ecologically based pest-control strategy that relies on natural mortality factors - such as natural enemies - weather - cultural control methods - and carefully applied doses of pesticides

3. Chemicals that kill plants

4. Plants that grow for more than two years

5. The removal of thin layers of soil as little rivulets of running water gather and cut small channels in the soil

6. Plants that can be planted immediately after harvest to hold and protect the soil

7. Including poisoning and illnesses caused by relatively high doses and accidental exposures

8. Water saturation of soil that fills all air spaces and causes plant roots to die from lack of oxygen; a result of over irrigation

9. Systems - such as minimum till - conserve-till - and no-till - that preserve soil - save energy and water - and increase crop yields

10. A program in which you make an annual contribution to a local farm in return for weekly deliveries of a 'share' of whatever the farm produces

11. Someone who eats locally grown - seasonal food

12. In pest management - the point at which the cost of pest damage exceeds the costs of pest control

13. Peeling off thin layers of soil from the land surface; accomplished primarily by wind and water

14. Kill fungi

15. A process in which mineral salts accumulate in the soil - killing plants; occurs when soil in dry climates are irrigated profusely

16. Shaping the land to cerate level shelves of earth to hold water and soil; requires extensive hand labor or expensive machinery - but it enables farmers to farm very steep hillsides

17. Kill insects

18. Toxic gases such as methyl bromine that are used to kill pests

19. A broad-spectrum poison that kills a wide range of organisms

20. Protective ground cover - including both natural products and synthetic materials that protects the soil - save water - and prevent weed growth

21. 'botanicals' or organic compounds naturally occurring in plants - animals or microbes that serve as pesticides

22. Any chemical that kills - controls - drives away - or modifies the behavior of a pest

23. Organic molecules to which phosphate group(s) are attached

24. Inorganic chemicals such as metals - acids - or bases used as pesticides

25. A layer of soil beneath the topsoil that has a lower organic content and higher concentrations of fine mineral particles; often contains soluble compounds and clay particles carried down by percolating water

26. An association between the roots of most plant species and certain fungi. The plant provides organic compounds to the fungus - while the fungus provides water and nutrients to the plant

27. Hydrocarbon molecules to which chlorine atoms are attached

28. Removal of layers of soil - creating channels or ravines too large to be removed by normal tillage operations

29. Planting different kinds of crops alternating strips along land contours; when one crop is harvested - the other crop remains to protect the soil and prevent water from running straight down a hill

30. Plowing along hill contours reduces erosion

31. Conversion of productive lands to desert

32. The first true layer of soil; layer in which organic material is mixed with mineral particles; thickness ranges from a meter of more under virgin prairie to zero in some desserts

33. Include cancer - birth defects - immunological problems - endometriosis - neurological problems - Parkinson's disease - and other chronic degenerative diseases

34. Beneficial microbes (bacteria or fungi) that can be used to suppress or control pests

35. A rebound of pest populations due to acquired resistance to chemicals and nonspecific destruction to natural and competitors by broad scale pesticides