Articles > Government magazines > Applied and Social Sciences magazines > Dictionary of American History entries

Article: Hydroponics

Article from:
Dictionary of American History
Author:
Copyright

HYDROPONICS

HYDROPONICS, a method of growing plants in nutrient solutions, without soil. Under normal conditions, soil captures and stores nitrogen, potassium, and other mineral nutrients, which plant roots absorb gradually. Hydroponics, in contrast, immerses roots directly in liquid nutrient solutions. Plants are either suspended above water with their roots submerged, or they are placed in sand or in sterile growing mediums and regularly flooded with liquid nutrients. Proponents say this minimizes nutrient loss and allows more precise control over the nutrients the plants receive.

The principles of hydroponic gardening have been used since ancient times. They were brought to popular ...

Read all of this article with a FREE trial

Related newspaper, magazine, and journal articles:

Article: Beef goes green: Traditional growing methods may be ...
San Jose Mercury News (San Jose, Calif.) (via Knight-Ridder/Tribune News Service);  July 24, 2002 ;     700+ words ... ... after the recent bouts of mad cow disease, which spread when infected cattle were ground up and fed to other cattle. In the United States, grass feeding was the norm until the end of World War II, when gunpowder plants were converted into nitrogen fertilizer ...

Article: Beef goes green: Traditional growing methods may be ...
Knight Ridder/Tribune News Service;  July 29, 2002 ;     700+ words ... ... after the recent bouts of mad cow disease, which spread when infected cattle were ground up and fed to other cattle. In the United States, grass feeding was the norm until the end of World War II, when gunpowder plants were converted into nitrogen fertilizer ...

Article: United States: Exxon Mobil to move into biofuel ...
TendersInfo;  July 15, 2009 ;     700+ words ... ... last five to six years, Jacobs said, and will involve the creation of a new test facility in San Diego to study algae-growing methods and oil extraction techniques. After that, he said the company could invest billions of dollars more to scale up the technology ...

Article: United States: DOE Earmarks $85M for Advanced ...
TendersInfo;  July 18, 2009 ;     658 words ... ... Tuesday, Exxon Mobil Corp. announced a partnership with the biotech company Synthetic Genomics Inc. to study algae-growing methods and oil extraction techniques (Greenwire, July 16). Fellow oil majors Royal Dutch Shell PLC, Chevron Corp. and BP ...

Article: Ahead of the curve: environmentally responsible growing ...
Grocery Headquarters;  October 1, 2008 ;     700+ words ... ... consumer demand for transparency in the growing methods and food safety standards of their ... inclusive environmentally friendly growing methods available is to chose hydroponically ... precious soil nutrients. Hydroponic growing methods strive to maximize yield by using ...

Article: EGYPT: LECTURE ON NEW AGRICULTURAL GROWING ...
IPR Strategic Business Information Database;  July 25, 2001 ;     497 words ... ... Manager of the Agricultural Laboratory at the Ayn Shams University, lectured in October 2000 on new agricultural growing methods. Also taking part in the lecture was Dr. Usama Al-Buhayri, Manager of the Special Agriculture Division.

Article: Site-ation pearl growing: methods and librarianship ...
Journal of the Medical Library Association;  July 1, 2005 ;     700+ words ...INTRODUCTION Citation pearl growing is the process of using the characteristics of a relevant and authoritative article, called a pearl, to search for other relevant and authoritative materials [1]. Site-ation pearl growing is the parallel process of using the characteristics of a relevant and

Article: Need stressed to modernize mango growing methods.
PPI - Pakistan Press International;  October 24, 2008 ;     472 words ...Multan, October 23 (PPI) : First Annual General Meeting of Multan Mango Growers Association was held here Thursday under the chairmanship of Muzaffar Hayat Khakwani. He briefed the members that association was established to protect, preserve and promote the heritage of Multan Mango and

 
 
Newsweek Harper's Magazine The Washington Post Chicago Tribune Crain's Chicago Business PRNewswire Pediatric News The Nation Advertising Age The Economist (US) A FREE trial gives you access to over 80 million articles! Access over 6,500 publications with a FREE trial!

Find articles, research, and archives