automatic depth-keeping controls
51irrigation and drainage — ▪ agriculture Introduction artificial application of water to land and artificial removal of excess water from land, respectively. Some land requires irrigation or drainage before it is possible to use it for any agricultural production; other… …
52vegetable farming — Introduction growing of vegetable crops, primarily for use as human food. The term vegetable in its broadest sense refers to any kind of plant life or plant product; in the narrower sense, as used in this article, however, it refers… …
53Switch-technology — is a technology for automata based programming support. It was proposed by Anatoly Shalyto in 1991. It involves software specification, design, implementation, debugging, documentation and maintenance. The term “automata based programming” is… …
54List of Storm Hawks characters — This is a list of characters in the YTV series Storm Hawks. The fictional universe of Storm Hawks centers around travel by flight and a variety of geographic locations. As such, some characters are named after weather conditions, birds, or flight …
55flight, history of — ▪ aviation Introduction development of heavier than air flying machines. Important landmarks and events along the way to the invention of the airplane include an understanding of the dynamic reaction of lifting surfaces (or wings), building… …
56Northeast blackout of 2003 — States and provinces that experienced the blackout; not all areas within these political boundaries were affected. The Northeast blackout of 2003 was a widespread power outage that occurred throughout parts of the Northeastern and Midwestern… …
57Canon AE-1 — Infobox camera camera name = Canon AE 1 type = 35 mm SLR camera lens mount = Canon FD focus = manual exposure = Shutter priority flash = Hot shoe frame rate = Manual lever winding, unmodified. dimensions = The Canon AE 1 was an amateur level,… …
58children's literature — Body of written works produced to entertain or instruct young people. The genre encompasses a wide range of works, including acknowledged classics of world literature, picture books and easy to read stories, and fairy tales, lullabies, fables,… …
59PlayStation (console) — For other uses, see PlayStation (disambiguation). PlayStation …
60Color temperature — The CIE 1931 x,y chromaticity space, also showing the chromaticities of black body light sources of various temperatures (Planckian locus), and lines of constant correlated color temperature. Color temperature is a characteristic of visible light …
