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Questions related from Portia Phohlo
Good day RG family I have been using the Keen-Rackzowski method for determining water holding capacity. I have been getting really good results with this method and it's correlating very well...
10 October 2018 4,162 7 View
Most of the publications I have read highlight Ca as the only nutrient responsible for P precipitation in alkaline soils and Al and Fe as the P fixing nutrients under acid conditions. The tendency...
09 September 2016 3,695 21 View
My understanding of porosity is that it gives you the percentage amount of pore spaces within a given volume of soil. I have worked with a range of soils that vary in their bulk density ranging...
08 August 2016 5,986 27 View
I have had numerous soil samples analysed from various farms with different soil types 2 years ago. The soil samples were analysed for Total N,C and other nutrients. I re-sampled the farms again...
07 July 2016 3,846 41 View
I have read many studies which use anaerobic incubation method to determine PMN. My understanding is that when soils are flooded with water, denitrification processes are enhanced because of lack...
04 April 2016 7,642 5 View
I have found the attached FAO report which classifies Cl as a macro element. All of the papers, case studies and reports that I have read previously classify Cl as a micro element. I would really...
04 April 2016 1,744 12 View
The soils have been analysed to have a K ppm & % value of (Av 200 ppm and 3%); Mg (400 ppm & 31%); Ca (1002 ppm & 45%) as well as Na (200 ppm & 19%). Because this is a dry-land...
05 May 2015 9,351 22 View
What norms (mg/kg) are used to determine Al toxic and optimum levels in soils?
03 March 2015 1,508 11 View
I have been doing an analysis called cellulolytic activity (Smith and Hughes, 2001) in order to see if there is any fungal activity in the soil. The method basically involves the use of filter...
01 January 2015 1,366 8 View
