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Alternative agriculture

Article Abstract:

Plant geneticist Wes Jackson founded a revolutionary concept dubbed as the perennial polyculture or natural systems agriculture. This system proposes to replace yearly crops with perennials, prairie seed-bearers, to prevent topsoil erosion and restore ecological functions of the vanished grasslands.

Author: Stover, Dawn
Publisher: Time, Inc.
Publication Name: Popular Science
Subject: Science and technology
ISSN: 0161-7370
Year: 1997
Research, Methods, Agriculture, Evaluation, Prairie ecology, Jackson, Wes

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The future of LEDs: color-making plastics

Article Abstract:

A research team from the University of Rochester and Xerox Corp. has developed plastic light-emitting diodes (LEDs) which could produce a variety of colors. The LEDs may be used in developing hang-on-the-wall television screens and flat-panel displays for personal computers and similar devices.

Author: Stover, Dawn
Publisher: Time, Inc.
Publication Name: Popular Science
Subject: Science and technology
ISSN: 0161-7370
Year: 1997
Usage, Innovations, Product development, Xerox Corp., XRX, Plastics, Light-emitting diodes, LEDs

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Land of lakes?

Article Abstract:

A description is presented of the high-resolution images taken of the planet Mars which reveal extensive layers of sedimentary rocks on the planet's surface. The early climate of the planet is discussed.

Author: Stover, Dawn
Publisher: Time, Inc.
Publication Name: Popular Science
Subject: Science and technology
ISSN: 0161-7370
Year: 2001
Portrayals, Mars (Planet), Natural history, Planetary meteorology

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