Portia Phohlo

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Questions related from Portia Phohlo

Is total water holding capacity at saturation the same as total porosity?

Can total porosity be deduced from the water holding at saturation? That is when soil is at saturation does that mean all pore spaces are filled with water? If this is true can one assume that the...

07 June 2021 2,553 10 View

What could cause a significant decrease in total N levels in soil within a period of 2 years?

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...

12 July 2016 3,428 40 View

Hydrometer method vs Mid infrared method for soil texture

Is the hydrometer method for soil particle size analysis directly comparable with a mid-infrared method for the determination of clay percentage? I am worried about the 18 samples I have analysed...

01 January 1970 8,494 3 View

Which lab method is suitable for P extraction in acidic soils high in Al and Fe oxide?

Additionally, how to manage P fertilisation in such soils? Continuously apply P fertiliser even though there is a big chance it might be fixed by sesquioxides?

01 January 1970 3,838 8 View