Re: Protea and Iron
- To: m*@ucdavis.edu
- Subject: Re: Protea and Iron
- From: "* T* F* <f*@aloha.net>
- Date: Thu, 13 May 1999 14:52:34 -1000
Found this online:
http://Agrss.sherman.Hawaii.Edu/bookshelf/macadami/macadami.htm#Fertilization
c.Phosphorus (P): A leaf concentration of 0.08 percent P (dry weight basis)
or above is needed for maximum growth rate of young trees. To assure
maximum yield of bearing trees, a value of 0.08 or higher should be
maintained. Leaf phosphorus percentages above 0.20 percent of dry weight
are associated with chlorotic and firing symptoms, so should be considered
excessively high.
In soils having low phosphorus-fixing capacity (e.g., unweathered lava),
excessive phosphorus can lead to immobility of iron in the plant and the
appearance of iron-deficiency symptoms (chlorosis in leaves); under such
conditions, a phosphorus level of 0.12 percent can be excessive.
Mach T. Fukada
fukada@aloha.net
MACh Tech,
Macintosh Computer and Agriculture/Aquaculture Consulting
Visit our friends at the Honolulu Aquarium Society
http://www.geocities.com/Heartland/Meadows/2948/HASF.html
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http://www.thefishshack.com/
