Science topics: Agricultural ScienceSoil SciencePedology
Pedology - Science topic
Pedology is the study of soils in their natural environment.
Questions related to Pedology
Do you know about abiotic soil organic matter mineralization processes?
In soil science, we always talk about biologically-driven mineralization of soil organic matter.
However, do strictly abiotic mineralization processes exist?
Processes that do not rely on the intervention of life to occur, even indirectly?
If they exist, are they insignificant?
Or, can they dominate/surpass biotic mineralization under certain circumstances?
I have come across a few machine learning algorithms, for prediction of soil chemical properties such as pH, EC, Available nutrients. But, rarely the use of diffuse reflectance spectroscopy assisted by machine learning algorithms. can anyone suggest me some papers regarding the application of different ML techniques in Pre-processing and prediction of pedological properties in hyperspectral imagery.
In which SCORPAN factor do the Landsat bands fit into? Without any ratios/indices, just the "pure" bands.
Spectroscopy is said be easier and cheaper for soil chemical property analysis. how well does it perform in mineralogical studies? also how well does the data set calibration and validation tests yields any relevant results through machine learning and artificial neural network in this field?
I basically belong to non programming background, I do know moderate application of R-Studio in PLRS and basic training set and validation set preparation.
Professor Nicolae Florea, our former colleague, was celebrated by the Romanian Academy on his 100th birthday.
During the homage session, held on June 7, Professor Nicolae Florea was praised for his merits as head of the school of soil classification and mapping, for capitalizing of information on soil and environmental resources in Romania and for his contribution to the development of Romanian education, to the training of specialists in the field of soil science.
Our institute expresses its respect for professor Nicolae Florea for the evolution of the concept about soil in Romanian pedology and for his entire scientific activity within the institute.
#research #soil_science #Nicolae_Florea
I intend to draw soil profiles in my research illustrating the amount of sand, silt and clay from each layer. Pedology; Fluvial Geomorphology.
I am looking for some good datasets related to land use and agricultural practices such as conventional and conservation agriculture and their contribution to soil erosion and health on global scale. Any help would be greatly appreciated. Thank you.
How we can separate the modern and ancient impacts on soils from each others?
I am looking for studies that compared soil texture results obtained from field tests (ribbon test, jar test, throw-the-ball test, sausage test, etc.) with results obtained from laboratory.
Have you heard of such studies and, more generally, which field method would you recommend as the most accurate?
Thank you immensely,
Soil texture, determined by the measurement of particle size distribution, introduces three variables to create texture classes.
However, if we forget about the three fractions (clay, silt and sand), a the end of the particle sizes are distributed along a continuous axis (one dimension).
Could it be possible to derive a single number to characterize soil texture, to make whatever calculation more useful?
Some people use sometimes sand content, or clay content, reducing the (somewhat arbitrary) three dimensions of texture to a single value, but there should a mathematically more acceptable way to reflect soil particle size distribution withtout loosing too much information?
What do you think?
The average or medial particle size could perhaps be more interesting? Or some sort of the average particle size of the interquartile of the distribution (if it is unimodal...)? Any thoughts?
Not being able to reduce soil texture to a single value often feels constraining to make relevant data analyses...
The mineralisation rates or soil organic matter are influenced by temperature and moisture.
I am trying to classify climates, using associations between cumulated annual rainfall and annual average temperature.
Has anyone ever tried to study how soil organic matter or carbon levels where related to the combination of these two easily accesible climate parameters (temperature and rainfall)?
Observed level of SOM or SOC is distinct from the rate of mineralisation of course.
But using climate data is could be interesting to estimate mineralisation rates using only rainfall and temperature (if the relationship is good, and perhaps adjusting with soil texture).
they said the the best way for teaching especially in university; is learning the student how to learn, i want to know the basics and principles of this approach
What are the mechanisms for sharing knowledge between teachers and students?
"how to transference the Implicit knowledge into Explicit knowledge or sharing knowledge especially for the PhD student and Supervisor ?
hello to everyone, I am working on estimating soil loss with the USLE model, but I had a problem how I can affect for each lithological unit of the factor K valeus !! I do not have pedological data !!help.
It was revealed in some recent studies that some selected soil properties used in the criteria of identifying soil series (Soil Taxonomy) have undergone some changes, How to overcome this problem or do we need change soil taxonomy now and then?
"The C/N ratio of soils is about 10–12:1." ( Donald L. Sparks, in Environmental Soil Chemistry (Second Edition), 2003)
I know, the wording of my question is very strange, but that is to provoke you.
This homogeneity does not sound astonishing to you?
From a soil organic matter perspective, wouldn't it be normal to find different C/N ratios depending on the decomposition/humification stage?
Are soil scientists generalizing or is it really a natural property of soils?
Do most soils tend to reach a C/N = 10 ?
It sounds like a very interesting "universal limit" to me.
What is your take on that? ;)
I have collected soil samples up to a depth of 50m from surface during drilling. I need to interpret alternate cycles of dry and wet climate on the basis of soil types. What are the criteria to classify soils into Entisol, Vertisol, Alfisol, Oxisol etc. ? I would like to know the parameters like texture, color, amount of organic matter, presence of particular minerals, cation exchange capacity, and pH values to characterise the soil types. It would be really helpful if you kindly provide me the list or document where the parameters range are given to classify the soils.
Thanks & regards,
I have been taught humus categories (mull, moder, mor) when we were talking of forest soils, but does this classification applies to agricultural soils for example?
As agricultural soil can be tilled and transformed through a wide range of practices, can we still apply the concepts behind humus types onto these different soils?
I would like to try to estimate the bulk density of some soil samples where I determined the Total Organic Carbon with Springer-Klee method.
Soil is from central Italy and has:
Texture (sand 19% ± 2.35; silt 46% ± 0.18; clay 34% ± 2.49), pH (8.3 ± 0.05), Field Capacity (29.3% ± 0.76) Walting Point (20.4% ± 0.54)
Although there are several correlations available in the literature to predict the properties and behavior of cohesive soils (clays/silts) by standard penetration test (SPT), however at the same time many textbooks mention that the use of SPT values for predicting properties of cohesive soils is not very reliable. What are the factors that influence the SPT values obtained in clays, and decrease their reliability to be used for the prediction of soil properties?
Do we need to use pure enzymes for such estimations?
More and more researchers tend to apply SEM in ecology, but is there any specific applications of SEM in foresty or geonomy, or pedology? And which software is free and also recommended for the use of SEM? Thank u all!
Can any one provide me the Soil site suitability criteria for horticultural crops viz. Apple, Cherry, walnut, peach etc ?
I am doing my PHD about some active faults in Mongolia by Paleoseismolgy method. The temperature in this country is about -30 to -40°C in winter. We opened a trenches and we saw cryoturbation deformations associated with seismic deformations. I have no experience in this topic and I appreciate your expertise.
We are looking for a soil scientist who has worked on volcanic soils, in order to collaborate on research projects, proposals, etc.
My idea goes up to analyzing soil color, texture and moisture by rolling over palm, soil particulate matter and texture by wet and dry sieving and weighing, soil carbon by weighing and burning, soil macro-fauna analysis etc. But there might be several such for a holistic approach. Could you please give a thought to it?
My thesis project on Taxonomy and Genesis of some Ultisols and Oxisols in Costa Rica.
I need some information about soil forming factor and process involved in Ultisols.
Thank so much.
Soil moisture data from the SMOS satellite is course resolution 30 to 40 km, how can this be downscaled to a fine resolution to a couple of kilometers.
I want to use digital soil mapping in a flat region that the slope is 1-2%, What environmental covariates i should use for this area?
It depends what is the purpose of mapping and in what country? For sure in development countries, as in Brazil (where I work), we still needing detailed soil class maps, either generated by conventional methods or by digital soil mapping.
We are trying to model erosion and deposition processes in ferralsols in the Cerrado Region Mato Grosso/Brazil using a process based simulation model. For that purpose we took soil samples and derived soil texture via sieve-sedimentation methods with previous mechanical dispersion via ultrasound. Due to high contents of iron oxides the soil is forming large amounts of aggregates in sand and silt fraction. Now we have problems simulating the initial and saturated soil water contents resulting mostly in sandy soil with van Genuchten PTF and Verreecken. On the contrary, simulating ksat using Campell is comparably easy. Does anyone have experience with this issue?
For example: the age of a cubic meter of an Amazon Soil.
Many elemental cycles research need to estimate the formation age of a soil, to infer about the sources of a specific element? There are many types of soil, besides the hydromorphic ones, the majority in Amazon are Podsol and Latosol.
I am studying the decline of the Atlas Cedar.
For the soil I will do the following analysis: granulometry, apparent density, total porosity, and water holding capacity.
Will studying these properties help me to understand the soil-side of the declining Atlas Cedar phenomenon? If not, any other suggestions?
Is it possible that only the physical analysis would answer the question of decline?
I have sampled soils and saprolite via hand-operated bucket auger up to a depth of 3.5 m. Now I am considering some deeper sampling and am curious about the experiences of others in this regard. Any tips for success? Horror stories to avoid?
I want to link soilscapes and land use, to rural landscapes and rural development.
Is there any method to estimate indirect (e.g. pedotransfer function) the value for soil's effective field capacity (e FC)? Can we relate empirically the values of e FC with available water content (AWC)?
How to classify soils in to different hydrological Soil Groups(HSG) as I have two soil groups from Andhra Pradesh India. The watershed is 86 km2 and topography is nearly flat ranging from 520-620 m above msl.
1. Fine, montmorillontic, (calcareous), Vertic Ustrop (black Soil). This soil group exists in low lying flat downstream areas.
2.Clayey-skeletal, mixed, Typic Ustropepts (red soil). this soil group covers undulating terrain.