I went to Sothern States and bought several bags of fertilizer. When I got
home I notice it was not exectally what I thought I was getting. The bag
had numbers of 24-4-4 and the 40 lb bag said it covered 8500 sqft. It did
have some weed killer in it that another brand did not have , but the other
bag had the same 24-4-4 in it and covers 15000 sqft. Why would one cover
almost twice the footage as the other ? I could see it being in the weed
killer, but the nitrogen being a high number like 24 seems that it would
make that way too much.
Where in the hell did you get an idea like that? 24-4-4 means a total
of 32 lbs of fertilizer, no matter who bags it or what else it
contains. USDA requires standard labeling on all fertilizer.
To give the OP an honest answer, I'd say the texture of the fertilizer
would be the difference. Coarse fertilizer would cover half the area
that a finer fertilizer would cover.
I guess you're a politician since you doubletalk and dodge the issues.
You said the herbicide carrier dilutes the amount of fertilizer per
pound of product. It doesn't. There is just as much fertilizer in a
bag whether it has a herbicide or not. There is filler in every bag
and the herbicide uses up about 1/4lb of the filler, not the
You said a full pound of N in a 50 lb bag will do will do 12k sq ft.
Since there's 12 pounds of N in a 24-0-0 bag, are you saying it'll do
144k sq ft?
And no, I have a hell of a lot of years of lawn & AG experience along
with a wall full of certificates from one of the top AG colleges in
the country. What do you base your lack of knowledge on?
The bags weigh the same. I was guessing that the numbers were related to
the percentage of components in the bag. That would mean to me that the bag
that had the herbicide in it was putting a lot more nitrogen per sqft than
the one that did not have the herbicide in it. I did not care if the
herbicide did anything or not , just wanted the nitrogen on the grass, so I
applied it at the more spread out rate so the 8500 sqft bag was applied at
the 15000 sqft rate.
I don't think that's guessing. The numbers are the percentages of
nutrients. So, it sounds like
one bag has it being applied at a lower rate. That's the only way to
get higher coverage for the same size bag
with the same X-X-X percentages.
That would mean to me that the bag
are pieces of information missing -- the way in which the nitrogen is
available, and what is used to determine the spread rate. Even though both
bags are 24% nitrogen, the OP didn't specify how much of that is slow
release and how much is water soluble, which has a big impact on the
nitrogen's availability to the turf.
Additionally, everyone so far has assumed that the nitrogen is the
determining factor in spread rate. It isn't for the weed-and-feed, in which
the pesticide is the determinant factor, and which has primarily water
soluble nitrogen to combat the immediate effects of the pesticide and very
little (if any) slow release nitrogen. (This also affects the timing of the
next application . . .) Regards --
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