World Library  
Flag as Inappropriate
Email this Article

Monoculture

Article Id: WHEBN0000052599
Reproduction Date:

Title: Monoculture  
Author: World Heritage Encyclopedia
Language: English
Subject: Biodiversity, Agriculture, Pollination management, Marine shrimp farming, Colony collapse disorder
Collection: Agricultural Terminology, Industrial Agriculture
Publisher: World Heritage Encyclopedia
Publication
Date:
 

Monoculture

Monoculture is the agricultural practice of producing or growing a single crop or plant species over a wide area and for a large number of consecutive years. It is widely used in modern industrial agriculture and its implementation has allowed for large harvests from minimal resources.

Monocultures can lead to the quicker spread of pests and diseases, where a uniform crop is susceptible to a pathogen. 'Crop monoculture' is the practice of growing the same crop year after year.[1]

The term is frequently borrowed for other uses, such as raising one species of livestock in a farm, or even in fields other than agriculture to describe any group dominated by a single variety, e.g. in the field of musicology to describe the dominance of the American and British music-industries in Western pop music, or in the field of computer science to describe a group of computers all running identical software.

A monocultivated potato field

Contents

  • Land use 1
    • Forestry 1.1
    • Lawns and animals 1.2
    • Disease 1.3
    • Polyculture 1.4
  • See also 2
  • References 3
  • External links 4

Land use

The term is mostly used in agriculture and describes the practice of planting crops with the same patterns of growth resulting from genetic similarity. Examples include wheat fields or apple orchards or grape vineyards. These cultivars have uniform growing requirements and habits, resulting in greater yields on less land because planting, maintenance (including pest control), and harvesting can be standardized. This standardization results in less waste and loss from inefficient harvesting and planting. It also is beneficial because a crop can be tailor-planted for a location that has special problems – like soil salt or drought or a short growing season.

Monoculture produces great yields by utilizing plants' abilities to maximize growth under less pressure from other species and more uniform plant structure. Uniform cultivars are able to better use available light and space, but also have a greater drain on soil nutrients. In the last 40 years, modern practices such as monoculture planting and the use of synthesized fertilizers have greatly reduced the amount of land needed to produce much higher yielding crops.[2] A huge problem with growing any crop in a monoculture is that once the land has been used to agriculture for a single species, soil fertility diminishes greatly.[3]

Forestry

In forestry, monoculture refers to the planting of one species of tree.[4] Monoculture plantings provide great yields and more efficient harvesting than natural stands of trees. Single-species stands of trees are often the natural way trees grow, but the stands show a diversity in tree sizes, with dead trees mixed with mature and young trees. In forestry, monoculture stands that are planted and harvested as a unit provide limited resources for wildlife that depend on dead trees and openings, since all the trees are the same size; they are most often harvested by clearcutting, which drastically alters the habitat. The mechanical harvesting of trees can compact soils, which can adversely affect understory growth.[5] Single-species planting of trees also are more vulnerable when infected with a pathogen, or are attacked by insects,[6] and by adverse environmental conditions.[7]

Lawns and animals

Examples of monoculture include lawns and most field crops, such as wheat or corn. The term is also used where a single species of farm animal is raised in large-scale concentrated animal feeding operations (CAFOs).

Disease

Monocultures used in agriculture are usually single strains that have been bred for high yield and resistant to certain common diseases. Since all plants in a monoculture are genetically similar, if a disease strikes to which they have no resistance, it can destroy entire populations of crops. Polyculture, which is the mixing of different crops, has natural variation and a likelihood that one or more of the crops will be resistant to any particular pathogen. Studies have shown planting a mixture of crop strains in the same field to be effective at combating disease.[8] Ending monocultures grown under disease conditions by introducing crop diversity has greatly increased yields. In one study in China, the planting of several varieties of rice in the same field increased yields of non-resistant strains by 89% compared to non-resistant strains grown in monoculture, largely because of a dramatic (94%) decrease in the incidence of disease, making pesticides less necessary.[9] There is currently a great deal of international worry about the wheat leaf rust fungus, that has already decimated wheat crops in Uganda and Kenya, and is starting to make inroads into Asia as well.[10] As much of the world's wheat crops are very genetically similar following the Green Revolution, the impacts of such diseases threaten agricultural production worldwide.

Polyculture

The environmental movement seeks to change popular culture by redefining the "perfect lawn" to be something other than a turf monoculture, and seeks agricultural policy that provides greater encouragement for more diverse cropping systems. Local food systems may also encourage growing multiple species and a wide variety of crops at the same time and same place. Heirloom gardening has come about largely as a reaction against monocultures in agriculture.

See also

References

  1. ^ http://www.cropscience.org.au/icsc2004/symposia/2/1/1128_cookrj.htm
  2. ^ G. Tyler Miller; Scott Spoolman (24 September 2008). Living in the Environment: Principles, Connections, and Solutions. Cengage Learning. pp. 279–.  
  3. ^ "Bananas." Environmental Impacts of Banana Growing /. N.p., n.d. Web. 20 Feb. 2014. .
  4. ^ http://www.ag-network-chile.net/Monoculture%20Forestry.htm
  5. ^ http://www.umich.edu/~nre301/forestry-02.doc
  6. ^ Richardson, Edited by David M. (2000). Ecology and biogeography of Pinus. Cambridge, U.K. p. 371.  
  7. ^ "Forestry". 
  8. ^ Zhu, Youyong (June 2000). "Genetic diversity and disease control in rice". International Weekly Journal Of Science 406: 718–722. Retrieved 17 August 2000. 
  9. ^ "Genetic Diversity and Disease Control in Rice". 
  10. ^ Vidal, John (2009-03-19). Stem rust' fungus threatens global wheat harvest"'". The Guardian (London). Retrieved 2010-05-13. 

External links

  • Monoculture and disease
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.
 


Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.