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President - GPC

I am going to drench a little on my soil and see what happens.....seems to be what the doctor ordered?

Many vascular plant species are unable to colonize limestone soils and the floristic composition of adjacent limestone and acid silicate soils differs greatly. Low-molecular organic acids (LOAs) in root exudates may greatly affect plant availability of nutrients and it is hypothesized that contrasting exudation of LOAs is a major mechanism controlling the calcicole and calcifuge behaviour of plants. Rhizosphere soil solution from two calcicole and two calcifuge species, grown in a pH-intermediate soil, was expelled by high-speed centrifugation.

The concentrations of LOAs in these solutions were determined by an application of ion chromatography using a supported liquid membrane enrichment technique. Concentrations of dicarboxylic (mainly oxalic) and tricarboxylic (mainly citric) acids were much higher in the soil solution of the calcicole species, whereas there was no difference in monocarboxylic (mainly lactic + acetic) acids between rhizosphere soil solutions of the two species categories. A consistent difference in the relative molar proportion of mono-, di- and tricarboxylic acids was also demonstrated among all species, indicating a species specific exudation of LOAs from plant roots. The solubilizing effect of acetic, oxalic and citric acid and their Na-salts on Fe, Mn and phosphate in two limestone soils and in the pH-intermediate soil was also tested. Citric acid and/or Na-citrate were powerful solubilizers of Fe and Mn and oxalic acid and/or Na-oxalate of phosphate, whereas acetic acid and/or Na-acetate was quite weak in this respect.

The results from this study strongly support the view that high exudation rates of di- and tricarboxylic LOAs is a major mechanism controlling calcicole behaviour of plants.

12/29/2011 1:32:13 PM

President - GPC

We have locked up soil here....perhapZ this unlockZ it...perhapZ it killZ all the weedZ.... I am going to find out....I will soil test in the Spring, but this weekend I am going to drench.... .5 OZ per gallon on a 25 X 25 foot patch.... I hope it to lower my Ph and to unjuice my soil....

12/29/2011 1:33:42 PM

Hinckley MN

Isn't vinegar easier to find? I use it to acidify my irrigation water.

12/29/2011 2:11:48 PM

South Hero, VT

My God, Wiz, it sounds like you've been contaminated by the amelio virus.

I wouldn't be surprised if the men in black come to visit you after your post.

At the very least, it might sterilize everything in the garden. good and bad.

lol

Keep us posted.

12/29/2011 5:00:37 PM

President - GPC

BiZ's patch will be down stream....itZ the least I could do for my bro.....lol

12/29/2011 6:04:50 PM

Cedar Lake, IN.

Wiz that stuff seems to be dangerous.

1/1/2012 8:30:08 AM

President - GPC

Yeah I know, I chickened out this weekend...but I am still going to do a section to see whatZ up.... I am starting to like Citric Acid better......

1/5/2012 9:57:26 AM