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2. Center-pivot irrigation - Wikipedia

   en.wikipedia.org/wiki/Center-pivot_irrigation

   A satellite image of circular fields characteristic of center pivot irrigation, Kansas Farmland with circular pivot irrigation. Center-pivot irrigation (sometimes called central pivot irrigation), also called water-wheel and circle irrigation, is a method of crop irrigation in which equipment rotates around a pivot and crops are watered with sprinklers.

3. Crop (implement) - Wikipedia

   en.wikipedia.org/wiki/Crop_(implement)

   A 76-centimetre (30 in) riding crop, with a 16-centimetre (6.3 in) US dollar bill to show scale. A crop, sometimes called a riding crop or hunting crop, is a short type of whip without a lash, used in horse riding, part of the family of tools known as riding aids. This can also be commonly used in abusive ways, but used correctly can have good ...

4. A. B. Dick Company - Wikipedia

   en.wikipedia.org/wiki/A._B._Dick_Company

   The company was founded in 1883 [1] in Chicago as a lumber company by Albert Blake Dick (1856 – 1934). It soon expanded into office supplies and, after licensing key autographic printing patents from Thomas Edison, became the world's largest manufacturer of mimeograph equipment (Albert Dick coined the word "mimeograph"). [3]

5. Rotary combination lock - Wikipedia

   en.wikipedia.org/wiki/Rotary_combination_lock

   A rotary dial combination padlock. A rotary combination lock is a lock commonly used to secure safes and as an unkeyed padlock mechanism. This type of locking mechanism consists of a single dial which must be rotated left and right in a certain combination in order to open the lock.

6. Bumper crop - Wikipedia

   en.wikipedia.org/wiki/Bumper_crop

   In agriculture, a bumper crop is a crop that has yielded an unusually productive harvest. The word "bumper" in this context comes from a usage that means "something unusually large", [ 1 ] which is where this term comes from.

7. Open-field system - Wikipedia

   en.wikipedia.org/wiki/Open-Field_System

   A four-ox-team plough, circa 1330. The ploughman is using a mouldboard plough to cut through the heavy soils. A team could plough about one acre (0.4 ha) per day. The typical planting scheme in a three-field system was that barley, oats, or legumes would be planted in one field in spring, wheat or rye in the second field in the fall and the third field would be left fallow.