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#1
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pH testing
The instructions for the Tenax soil testing kit say that one should not
test soil pH in summer. We've been unable to think of a good reason for this; can anyone suggest one, especially as regards compost straight out of the bin, or should I disregard it? regards sarah -- Waist deep, neck deep We'll be drowning before too long We're neck deep in the Big Muddy And the damned fools keep yelling to push on |
#2
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pH testing
"sw" wrote in message ... The instructions for the Tenax soil testing kit say that one should not test soil pH in summer. We've been unable to think of a good reason for this; can anyone suggest one, especially as regards compost straight out of the bin, or should I disregard it? regards sarah I work for a laboratory that does soil pH! We do them all year around so go a head! Although we do them slightly different than just sticking a probe into the wet soil! We first dry the soil at 30deg C for 4 days; then grind it up into a powder; then shake 20g of it in RO water for 20min. Then it gets tested against a calibration curve with two points 4 pH and 9.2 pH! Hope this helps. Badger |
#3
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pH testing
Little Badger wrote:
"sw" wrote in message ... The instructions for the Tenax soil testing kit say that one should not test soil pH in summer. We've been unable to think of a good reason for this; can anyone suggest one, especially as regards compost straight out of the bin, or should I disregard it? I work for a laboratory that does soil pH! We do them all year around so go a head! Although we do them slightly different than just sticking a probe into the wet soil! We first dry the soil at 30deg C for 4 days; then grind it up into a powder; then shake 20g of it in RO water for 20min. Then it gets tested against a calibration curve with two points 4 pH and 9.2 pH! Hope this helps. Thanks, it does. I wonder why the manufacturer thinks summer is the wrong time of year? FWIW the kit does require a dried soil sample diluted with water, but they state that tap water is adequate. I've got some distilled :-) regards sarah -- Waist deep, neck deep We'll be drowning before too long We're neck deep in the Big Muddy And the damned fools keep yelling to push on |
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