Controlled release fertiliser

Controlled release fertiliser

A Controlled Release Fertilizer (CRF) is a solid form fertilizer, usually in powder or small granules that are either sprinkled on top of the soil (top dressed) or dug into the soil before planting. The outer layer is insoluble but permeable so nutrients are released slowly in a controlled way over a set period.[1] [2] Other names for controlled release fertilizers are "metered-release fertilizers" and "slow-acting fertilizers".

See also

References

  1. ^ "Royal Horticultural Society - Gardening Advice: Controlled-release Fertilizer Eggs". http://www.rhs.org.uk/Advice/profiles0304/fertiliser_eggs.asp. 
  2. ^ "SpringerLink - Journal Article". http://www.springerlink.com/content/u702t10765qp7164/. 



Wikimedia Foundation. 2010.

Игры ⚽ Нужно сделать НИР?

Look at other dictionaries:

  • Organic fertilizer — Organic fertilizers are naturally occurring fertilizers (e.g. compost, manure). Naturally occurring organic fertilizers include manure, slurry, worm castings, peat, seaweed, humic acid, and guano. Sewage sludge use in organic agricultural… …   Wikipedia

  • CRF — may refer to: * Capital recovery factor * Cardiovascular Research Foundation * Carolina Renaissance Festival * Case Report Form: in a clinical trial, the document showing all the evaluated patient data. eCRF is the electronic transmitted CRF via… …   Wikipedia

  • Fertilizer — Tennessee Valley Authority: Results of Fertilizer demonstration 1942 …   Wikipedia

  • Green roof — Traditional sod roofs can be seen in many places in the Faroe Islands …   Wikipedia

  • Mephedrone — Not to be confused with methedrine, methedrone, methadone, or methylone. Mephedrone Systematic …   Wikipedia

  • Mikhail Khodorkovsky — Khodorkovsky in 2001 Born 26 June 1963 (1963 06 26) (age 48) Moscow, Soviet Union Nationality …   Wikipedia

  • Factory farming — A commercial chicken house raising broiler pullets for meat …   Wikipedia

  • Phosphorus — This article is about the chemical element. For other uses, see Phosphorus (disambiguation). silicon ← phosphorus → sulfur …   Wikipedia

  • Permaculture — The word permaculture, coined by Australians Bill Mollison and David Holmgren during the 1970s, is a portmanteau of permanent agriculture as well as permanent culture. Through a series of publications, Mollison, Holmgren and their associates… …   Wikipedia

  • Ireland — This article is about the island. For the sovereign state of the same name, see Republic of Ireland. For the constituent country of the United Kingdom, see Northern Ireland. For other uses, see Ireland (disambiguation). Coordinates …   Wikipedia

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”