|By Jenesaispas (Jenesaispas) on Monday, April 19, 2004 - 07:20 pm: Edit|
Alright, as I was reviewing about plants, I stumbled across the sentence, "Soil that contains humus is nutritious for plants. Humus is acidic; therefore, it retains positively charged minerals until plants take them up."
Uh, don't acidic things have a HIGH concentration of positive hydrogen ions, which would mean they would "retain" negatively charged minerals, or have I been under this huge misconception for all of high school?
|By Jenesaispas (Jenesaispas) on Monday, April 19, 2004 - 07:24 pm: Edit|
So I guess I am asking for a clarification or if this is in error.
|By Jenesaispas (Jenesaispas) on Monday, April 19, 2004 - 08:17 pm: Edit|
someone must know the answer
|By Lahlahlah (Lahlahlah) on Monday, April 19, 2004 - 08:28 pm: Edit|
high conc of negative ions ... think HCL-
|By Aim78 (Aim78) on Monday, April 19, 2004 - 11:51 pm: Edit|
From what I know, humus is positively charged, and clay is negatively charged. A humus-clay complex has a net negative charge and attracts positive ions, which most minerals in the soil are. Read around that sentence, does it mention anything about clay?
|By Adidasty (Adidasty) on Tuesday, April 20, 2004 - 09:49 am: Edit|
almost there Aim. he is right. CLAY is negative. It attracts positive ions like ca2+ that are needed by the plant. the plants root hairs release H+ ions which forms a gradient to attract the positive ions into the plant.
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