Test your basic knowledge |

Subject : agriculture
Instructions:
  • Answer 35 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

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. Hydrocarbon molecules to which chlorine atoms are attached






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






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






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






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






6. 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






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






8. Conversion of productive lands to desert






9. Kill fungi






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






11. Kill insects






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






13. Plants that grow for more than two years






14. Someone who eats locally grown - seasonal food






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






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






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






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






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






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






21. 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






22. Chemical compounds that persist in the environment and retain biological activity for long times






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






24. 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






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






26. 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






27. Plowing along hill contours reduces erosion






28. 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






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






30. 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






31. Chemicals that kill plants






32. 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






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






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






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