Re: Yellowing leaves and fertilizing
- To: pumpkins@mallorn.com
- Subject: Re: Yellowing leaves and fertilizing
- From: H* E* P*
- Date: Fri, 18 Jun 1999 11:16:45 -0700
- References:
pumpkins@mallorn.com wrote:
>
> Also, when is the best time to fertilize? Just before or after a good
> watering?
> Greg "Titanic Atlantic" Sliwka
HE: Remember nitrate is the most soluble ion known (all nitrate
compounds are soluble). Therefore, there is a risk that lots of water
will wash the nitrate away especially in sandy soils. I do not know
whether it makes any difference, but I fertilize after watering--that
could cause roots to search mainly in the topsoil.
I was involved in some totally lost fields of sweetpotato in North
Carolina. The market roots were long and only an inch wide and could not
be sold to anyone--not even canneries. The soil was black, peaty sand.
They learned the roots were going deep to get the nitrate applied
earlier. They had been applying nitrate 3 times per season. By applying
several times in smaller amounts, they got fine marketable roots.
--
Harold Eddleman Ph.D. Microbiologist. i*@disknet.com
Location: Palmyra IN USA; 36 kilometers west of Louisville, Kentucky
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