1) crop rotation. The American HeritageŽ Dictionary of the English Language:
Fourth Edition. 2000.
...The successive planting of different crops on the same land to improve soil fertility and help control insects and diseases....
2) agronomy. The Columbia Encyclopedia, Sixth Edition. 2001
...dealing with various physical and biological factors-including soil management, tillage, crop rotation, breeding, weed control, and climate-related to crop production....
3) 4. The Classical Age, 510-323 B.C.E. 2001. The Encyclopedia of World
History
...Classical Age, 510-323 B.C.E. a. Economy, Technology, Society, and Culture In this period, crop rotation was introduced, dramatically increasing agricultural production....
4) § 40. revolve / rotate. 4. Science Terms. The American Heritage Book of
English Usage. 1996
...revolving debt is debt that is carries over from one credit card statement to the next; crop rotation refers to the successive planting of different crops on the...
5) rotation. The American HeritageŽ Dictionary of the English Language: Fourth
Edition. 2000.
...fixed. 3. Regular and uniform variation in a sequence or series: a rotation of personnel; crop rotation. 4. Games An order of shooting balls in billiards in which...
6) alfalfa. The Columbia Encyclopedia, Sixth Edition. 2001
...such prolific growth that it acts as an effective weed control, alfalfa is also valued in crop rotation and for soil improvement because of the nitrogen-fixing bacteria...
7) 1337-38. 2001. The Encyclopedia of World History
...to restore prosperity by redistricting and by appointing undertakers to supervise fixed crop rotation and to maintain a mounted militia. 2 1344-45 Increased penal...
8) beet. The Columbia Encyclopedia, Sixth Edition. 2001
...and Canada and to a lesser extent in the United States. The biennial beet is often used in crop rotation. The foliage of the sugar beet and several other varieties...
9) j. Scandinavia. 2001. The Encyclopedia of World History
...farming methods. At the turn of the century, much of Norwegian land was farmed without crop rotation, and Norway did not represent a major exporter of foodstuffs....
10) oats. The Columbia Encyclopedia, Sixth Edition. 2001
...of oats remains as a pasturage and hay crop, especially for horses. Oats are valuable also in crop rotation and have various industrial uses. Oat hulls are a source...
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