João Jesus

4 Questions 13 Answers 0 Followers

Questions related from João Jesus

Which are the best methods for the measurement of soil pH?

I was wondering which methods could be considered the best for a good assessment of soil pH. Namely, which extraction (saturated soil paste; 1:1; 1:2 soil to water extractions) could be used...

08 August 2014 5,025 38 View

Which is better, saturated soil paste or dilute water extract ?

I was wondering if it might be better for the determination of soluble salts from a soil to prepare a saturated soil paste and dilute it by 5 rather than prepare a 1:5 dilute water extract. A...

02 February 2014 8,479 15 View

In the gypsum requirement test, does exchangeable acidity interfere with the test results?

I am having trouble testing GR in my soils as the non saline soil have a positive GR. Does exchangeable acidity interfere with the test? And for potassium, how much must be present to interfere...

02 February 2014 5,965 1 View

What organic interference is there when testing for total hardness titration with EDTA?

While testing for total hardness, the protocols indicate that high levels of dissolved or particulate organic matter may interfere. How does it interfere? How much organic matter is necessary for...

02 February 2014 1,589 5 View