pH of Soil and Plant Nutrients

Basics of Gardening from Seed Starting to Deadheading

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Re: pH of Soil and Plant Nutrients

Post by tweedle2009 » June 20th, 2011, 10:35 pm

But not all plants respond to ammonia.

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Re: pH of Soil and Plant Nutrients

Post by Muhammad Arif Khan » June 21st, 2011, 11:49 am

Yes all plants respond to Ammonia. Nitrogenous fertilisers have nitrogen in two forms Ammonia and nitrate, ammonia is converted in to useable form by soil bacteria, and nitrate form is considered better for the plant. Agri fertiliser, Calcium Ammonium Nitrate has both forms. Urea is basically Ammonia while Nitro Phos and Pot. Nitrate have N in nitrate form.

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Re: pH of Soil and Plant Nutrients

Post by tweedle2009 » June 23rd, 2011, 10:48 pm

Thankyou for enlightining me Sir.

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Re: pH of Soil and Plant Nutrients

Post by Izhar » July 4th, 2011, 10:57 am

I have checked the pH of some which are as follows, I took 5 readings each and this was the range:

1) My prepared bedding Soil = 6.5 - 7.2 (I took 11 samples)

2) Coco Coir = 5.1 - 6.0

3) Coco Chips = 6.8 - 7.1

4) Potting soil for Gardenia with added Ferrous Sulfate = 6.0 - 6.2

5) Tap water = 7.5 - 7.8

6) Distilled water (new) = 6.9 - 7.0

7) Distilled water (several months old) = 7.0 - 7.2

8) Ojhri ki khad (old and dry) = 7.2 - 8.0

9) Ojhri ki khad (fresh and moist) = 6.8 - 7.0

The pH meter was calibrated with pH 4, pH 7 & pH 10 buffers after each item's 5 readings.

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Re: pH of Soil and Plant Nutrients

Post by Muhammad Arif Khan » July 5th, 2011, 10:15 am

Which PH meter are you useing and its availability?

Izhar
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Re: pH of Soil and Plant Nutrients

Post by Izhar » July 5th, 2011, 10:37 am

Sir, I used two pH meters... one is by "Hanna" pocket type and another is by "Oakton" bench-top type.. the pH meter by "Hanna" was bought by Mir Afzal sb. and the other one is at my university chemistry lab..

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Re: pH of Soil and Plant Nutrients

Post by M Farooq » July 7th, 2011, 7:48 am

>Why plants respond so well to rainy water is not its PH.
>Lightening in clouds produces lot of AMMONIA Which is a ready to use food for plants.

Just wanted to add a two cents' comment: I lately learnt from a researcher that pH of rains in Karachi are slightly alkaline! This was rather new to me but "alkaline rain" does occur where there is lot of dust in air. People are generally used to the term "acid rains". Karachi is among the number one cities where particulate matter and dust in air is at the highest level.

On the other hand, lightening process combines nitrogen and oxygen and form nitrogen oxides, in which in turn with water forms nitric acid in water. This is an excellent nutrient for plants in low quantities. In a strict sense, ammonia is a toxic gas that requires nitrogen and hydrogen (which does not exist in the atmosphere). Ammonium ions are known to be present in rain water (to a very little extent) but the source is decomposing organic matter from Earth which goes into the atmosphere and the rain brings it back.

Regards.

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Re: pH of Soil and Plant Nutrients

Post by Muhammad Arif Khan » July 7th, 2011, 9:49 am

Frooq, thank you for up dating my old concept.

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Re: pH of Soil and Plant Nutrients

Post by Muhammad Arif Khan » January 25th, 2012, 10:47 am

Can any one guide me as to where can I get PH measuring STRIPS?

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