Questions tagged [soil]
For questions about the outermost layer of the surface of the Earth. The soil is saturated with organic remains and rock particles.
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Up to what radius/distance/area maximum do weather parameters remain constant?
Up to what radius/distance/area maximum do weather parameters remain constant? For example, precipitation is so variable that it can vary even within a few meters, while sunshine durations may not ...
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Drying oven settings for drying soil samples
For my PhD, I will collect soil samples that need to be dried in drying ovens before being ground and ultimately analysed for their nutrient composition. While drying, the samples will be weighted ...
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Slavery and soil quality [closed]
I am reading the book Capitalism and Slavery: https://en.wikipedia.org/wiki/Capitalism_and_Slavery
The author argues that, in a historical context, working a plantation with slaves, in comparison to ...
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Relation between water holding capacity and moisture content
I would like to know if there is a link between WHC and humidity. I have a compost with a maximum retention capacity of 500 mL/L and a moisture content of 77%. I have about 290g of compost in each ...
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Meaningful Tests to challenge a Soil Probe
I'm an engineer doing some R&D designing a new product to measure some interesting soil parameters, and integrating a multi-pronged sensor probe to take the measurements. I'm considering making ...
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Reading a Soil Size Distribution Diagram
I have the Soil Size Distribution Diagram shown below from a source that does not specify the meaning of the labels A1=60, A2=50, and A3=50. I understand that it is data for three different samples, ...
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Is it possible/effective to synthetically produce chernozem soil?
Chernozem soils, called mollisols in the Americas, are black-colored soils containing a high percentage of humus (4% to 16%) and high percentages of phosphorus and ammonia compounds. Many earthworms ...
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Geotechnology: Prove a formula, calculated with unit weights, for void ratio
I don't know where else to post this.
I am reading a Geotechnical engineering textbook by B.M. Das, 6th edition.
Problem 3.1 is as follows:
For a given soil, show that
$$e=\frac{\gamma_{sat} - \...
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Reason for finding low boron levels in clayey soil with high organic matter?
I've read from various University Extension sites (e.g., here and here) that boron levels would be deficient in sandy soils with low organic matter.
This would suggest that boron levels would be ...
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Causes of high calcium levels in sandy alluvial soils
When soil calcium is high: High levels of soil calcium may be expected when there is substantial calcium carbonate bedrock from which the soil has weathered. Calcium levels can be high in agricultural ...
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Searching for Geochemical Threshold for PTE's of Spain
Where can I find a table with the geochemical threshold for potentially toxic elements in the soils of Spain? I only have seen a decree with organic compounds for Spain.
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How do housing developments affect the soil of the surroundings? Are the minerals/molecules in cement available to plants? Or is the soil too basic?
Calcium carbonate in cement can make the soil more alkaline but does that make large housing developments have a significant or negligible affect on availability of nutrients? Does it cause nutrients ...
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How to define the lower boundary conditions: seepage face and unit gradient in terms of soil volumetric water content?
context: the models that simulate the flow of water in the soil (e.g. land-surface models)
In these models, in order to simulate percolation (/drainage) from the bottom of the defined soil column, we ...
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Why is the soil between these olive trees left bare?
These photos were taken this week in the Tarragona province of Spain which is also seeing a heat wave at the moment. One can also see farmers using cultivators removing what were wild weeds that grew ...
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How is layer compaction degree designed to be ≥90% in lower layers and ≥ 95% in the upper 5 ft in a railway embankment?
I am currently working at the Tren Maya project in México as part of the planing department; anyways I studied a Masters degree, and looking at the executive project, there are some parameters I’ve ...
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