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Re: Humate Sources
summerc@pilot.msu.edu (Cheryl Lynn Summer) wrote:
>My soil test
>indicates I need 300 lbs/A and 400-500 lbs/A (two fields) of humates
...
>If you have time I could use an education on what materials classify as
>humates, what experiences you've had, in what situations can I modify the
>application rate (budget is a concern), and what type of response (crop-wise
>and soil test-wise) can I expect.
This sounds somewhat suspect straight away. You're already applying both
organic matter and lime - how did the soil test identify a "humate
deficiency"? I don't know of any definitive work on critical soil or
crop levels of "humates", nor of a soil test for "humates". Be careful,
especially at $170/ton!
So called humates are often derived from coal or lignite deposits, and it
stretches one's imagination a little to consider them as "essential" soil
amendments.
-
Andrew Rate (rate@uniwa.uwa.edu.au), Soil Science and Plant Nutrition Group,
University of Western Australia, WA 6907, AUSTRALIA. Tel: +61 9 380 2500
Fax: +61 9 380 1050 WWW: http://www.uwa.edu.au/cyllene/soilweb/
Disclaimer: my opinions do not necessarily reflect those held by UWA.
References: