Farming
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Farming
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25 Questions

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

2. Kill fungi

3. Plowing along hill contours reduces erosion

4. Plants that grow for more than two years

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

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

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

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

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

10. 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

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

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

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

14. Someone who eats locally grown - seasonal food

15. Chemicals that kill plants

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

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

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

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

20. 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

21. 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

22. Kill insects

23. 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

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

25. 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