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Somewhat alkaline compost
I have a couple of yards of compost from the last few
years of composting my leaves. The two years ago pile now has a nice fine texture, and I decided, on a whim, to check its pH. I came up with a somewhat alkaline reading, say 7.0-7.5, which may be due to my use of a lot of leaves (e.g. of polar and elm) that some sources demean for their alkaline tendencies. I gather that this level of alkalinity is more than most veggies and small fruits want, especially in my context (high plains of Colorado) in which acid soil is not an issue. I'm wondering: 1) Is it reasonable to think that my compost might be alkaline enough to account for the poor performance my veggies have had in recent years (I typically plant my veggies in furrows with a few inches of my finished compost)? 2) If I want to acidify the compost, what might anyone recommend? Obviously, elemental sulfur is a common choice, as for blueberries, but I understand that many veggies taste better if grown in low sulfur soils, so I have been thinking to avoid that. I was thinking about dousing my compost pile with some HCl (muriatic acid) commonly available for masonry, scale removal, etc. at a level enough to bring the pH down to say 6.0 or so, but I wonder whether plants would be happy with the chloride that would contribute to the soil. As you can see, I'm not adverse to chemical solutions, although I would be interested in softer ways to acidify the compost as well. (Large supplies of oak leaves are not something I can get my hands on.) So, thoughts and suggestions would be welcome. Thanks, -- =-=-=-=-=-=-=-=-=-==-=-=-= Mike Lacy, Ft Collins CO 80523 Clean out the 'junk' to email me. |
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il 28 Jan 2005 14:08:56 -0800, "simy1" ha scritto:
[snip] I also disagree that the alkalinity you have is too high. Beets, onions and chard will like it exactly so, and I find the taste of tomato and lettuce to be improved by alkaline shots of wood ash. Various brassicas and some mustards will be better at 7 than at 6.5. Garlic, peas or chicory will not care. Zucs, potatoes, beans and peppers do like it more acid, and of course all berries except blackberries like it acid. I've read on a site in Queensland that peppers like it slightly alkaline. And figs also like it alkaline, so much so that some people put concrete fragments in the bottom of the pot. Mushroom compost is alkaline and if not sterilised , a source of mushrooms later. :-)) (unfortunateluy I can't locate the URL) -- Cheers, Loki [ Brevity is the soul of wit. W.Shakespeare ] |
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