Soil Analysis

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Questions related to Soil Analysis

What are the criteria for selecting variables for PCA analysis ?

How can I select variables for PCA analysis from huge set of data? except the biological significance of the variables, are there other criteria for objectively choosing the most relevant...

22 February 2021 9,735 10 View

How to use ABAQUS program simulation soil creep behavior ?

I have use ABAQUS to simulation soil creep. In my soil model, the elastic part is follow linear elastic model, the plastic part is follow Modified Drucker-Prager/cap model and the creep part is...

21 January 2021 3,202 0 View

How do you prevent excessive foaming of organic-matter-rich soils during H2O2 digestion?

My samples are very high in organic matter, and even small amounts of H2O2 cause the samples to foam up 4-5 times the beaker volume, spilling onto the lab bench. Is there anything that can be done...

18 January 2021 8,932 3 View

How to dry marine sediment without a clay crust forming on top?

Hi All I am drying marine sediment which is composed of a lot of fine grains. I have washed the sample and both placed in an oven and air dried. However, both times I develop a clay crust on top...

18 January 2021 9,853 5 View

How to convert soil N% into Kg/hectare?

1. Please anyone tell me if I analyse my soil nitrogen through CHNS analyser and I get my reading in N% and according to the calculation if my reading is 0.07% then: N Kg/hectare =...

15 January 2021 7,613 11 View

Is there a universal standard in manning friction values for land cover or the values need to be adjusted to the study area over again ?

I see huge discrepancy between researchers (difference for the same class is somewhere up to 0.2). What determines the choice of the appropriate value ? What is the role of spatial resolution of...

12 January 2021 3,984 2 View

Can anyone provide me with a procedure for determining chloride ions in soil samples?

I want to test the chloride ion concentration in the soil sample where I am conducting a research, but I cannot find a procedure to proceed. Thanks in advance!

08 January 2021 5,824 9 View

Thawing or defrosting methods for frozen soil samples?

I have soil samples that have been frozen for a while and I need to re-acclimate them for a series of analyses that require incubation at 25C. I have been looking for laboratory methods but seem...

05 January 2021 5,096 3 View

If we increase the number of holes in the distributor plate will the minimum fluidization velocity decrease ?

We are trying to fluidize sand of diameter 300 to 600 microns using a fluidized bed of diameter 65mm. The bed is fluidizing at 0.7 meters per second. According to the literature, the bed must...

02 January 2021 440 8 View

How many micromoles of ammonia are there in 0.1mM solution of ammonium sulphate???

Can any one share the calculations. as double ammount of ammonia is present in ammonium sulphate. 0.1mM solution of ammonium sulphate contain 200 micromoles of ammonia is this correct. i have to...

30 December 2020 3,532 7 View

What Explained Variance is good to proceed with Predictive Soil Mapping?

I have 1851 soil samples data on pH covering a study area of 7482sq.km in northern Ghana and I am using 52 environmental long-term average variables (Relief, Climate, MODIS Reflectances and...

28 December 2020 2,895 6 View

How can I realise the separation of clay mineral part from soil ? and what is this process called ?

Hey; I am looking to work on clays in my soil samples, So I need to extract them first. I know that I should first remove all the bending agents that make the clay sheets stay connected like (...

25 December 2020 7,232 2 View

Is it machine learning models that have replicability capability?

We are doing the prediction of soil nutrients using spectral information by applying machine learning models. More than 300 soil samples were used from one district for analysis. We got the...

22 December 2020 9,856 3 View

What are the transport mechanisms of Chromium (Cr) from tannery wastes to human body?

Chromium is one of the main chemical ingredients of tannery industries. Those industries also produce a lot of chromium contaminated solid wastes. what are the biotransformation and...

13 December 2020 4,223 4 View

Nitrate , nitrite , ammonium test can be alternative of total nitrogen ?

I have ion chromatgrahy by which different type of cation and anion can be determined . kjeldal nitrogen arrangement is also available but it is not convenient to me rather than ion...

11 December 2020 1,201 5 View

Bulk density obtained of the forest surface soils is 0.81 gm/cubic centimetres, is it normal?

Bulk density of a forest soil sample in a community forest created under social forestry scheme in the district of Nadia, West Bengal is obtained as 0.81 gm/ cubic centimetre, comparatively too...

01 December 2020 4,906 33 View

Should I take sample from surface or subsurface for soil analysis?

I am currently doing my final year project on Geochemical analysis of peat samples. I will be looking at parameters such as major and trace elements plus anions and cations. Should i take samples...

28 November 2020 6,817 18 View

It is possible to determine ammonium and nitrate on 2M KCl extracts by HPIC?

Dear all, It is possible to determine ammonium and nitrate concentration on 2M KCl extracts by HPIC (Ion Chromatography)? Can you suggest me some analytical protocol (or manuscript) to determine...

10 November 2020 6,088 3 View

How is to calculate Ki value of an enzyme inhibitor? Is there any concise protocol ?

I also want to know the equation used to solve ki of an inhibitor

09 November 2020 364 7 View

How do I increase 260/230 ratio when extracting pool of DNA from soil sample?

I have tried using PowerSoil Pro kit from Qiagen with slight modifications- incubating at 65 degree for 10 mins after adding solution CD1, increasing the number of washes with CD5 to 3 times and...

28 October 2020 7,949 3 View

What was the reason to not analyze fresh soil sample as compared to dry soil sample for NO3 and NH4 ?

This is wondering me as how the process of soil sampling for both NH4 and NO3 ? what was the reason to not analyze fresh soil samples for both parameters ? the dry soil sample change the state of...

26 October 2020 8,922 2 View

How to fix convergence problmes using Mohr Coulomb Plasticity?

Dear colleagues, I am trying to simulate a strip foundation on a cohesionless soil with a friction angle of 30 degrees. However, I obtain convergence problems. I am using a geostatic step. The...

22 October 2020 4,733 2 View

How to amplify lignin degrading gene?

Hello colleagues, I would like to amply the lignin-degrading gene (i.e., LigX, LigY, LigZ, and LigW) from different types of soil. I have tried to find literature, but unfortunately, there are...

21 October 2020 9,807 3 View

Results of C and N comes out 0.00 for a soil sample collected in the natural terrestrial forest stands, is it possible?

After soil chemical analysis, obtained result for the content of organic carbon and nitrogen in kg/ha shows 0.00, whereas potassium content is 55.20 kg/ha for a surface soil sample collected in...

21 October 2020 9,618 7 View

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