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Make compost out of just straw and hay

Posted by sillyboy (My Page) on
Sun, Mar 18, 12 at 13:52

In the theory of mixing "greens and browns" to make compost, I often see suggestions of using hay or straw as a brown. So far as I can tell, that is wrong... in that hay is really a "green" (high nitrogen).

Assuming I am not on crack about that...

Couldn't I mix just hay (green) and straw (brown) in some reasonable ratio... to make some decent compost?

According to http://whatcom.wsu.edu/ag/compost/fundamentals/needs_carbon_nitrogen.htm:
Alfalfa hay is ~18:1 and straw is ~80:1 ... so something like 3 alfalfa to 1 straw to get near a 30:1 ratio?

Thoughts?


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RE: Make compost out of just straw and hay

  • Posted by pt03 2b Southern Manitob (My Page) on
    Sun, Mar 18, 12 at 14:02

Your premise is correct.

I see nothing wrong with mixing hay (green) and straw (brown) as compost feedstocks. Having said that, old hay (as in weathered) may not be as strong a green as expected.

Alfalfa bales will heat up quite nicely by themselves with the right moisture. :-(

Lloyd


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RE: Make compost out of just straw and hay

I mixed alfalfa hay with straw two years ago. I threw in some kitchen waste from time to time, but the bulk of it was straw and hay. It made GREAT compost.


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RE: Make compost out of just straw and hay

You could make compost, but probably not "decent" compost. Compost is supposed to have a fairly high level of nutrients, but that depends on what materials are put into that compost. Straw would be your major ingrediant and most of the nutrients would be gone, sent to the grain the straw grew.
If the material going in the mix is low in nutrients the finished product will also be low in nutrients.


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RE: Make compost out of just straw and hay

Hay may or may not make good green material. It is dependent on the protein level (N) in the hay. Some hay is more akin to straw while other hay could be up to the level of alfalfa. The round bales could even be different according to how deep the hay comes from . The outer levels will have less than the center. And this also depends on the age and how it was stored.
Some hay has been treated with herbicide. Some of these herbicides can show up in the garden and kill your veggies. (Grazon being one of them. It can even be passed on through the manure.)


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