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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18 views

sub soil data finding

I am going to search and finding some subsoil data, (vanGenuchten Parameters, specific storage, Hydraulic conductivity, porosity, Manning coefficient and humidity of root zone) I have no idea about ...
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32 views

What method do I use to derive the organic material content (as a percentage) per layer in SoilGrids

I am doing soil related calculations for moisture content and the soil characteristics I need (among others) is the content of the soil as a percentage for: sand clay organic matter I am thinking I ...
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Looking for variables to compare against pH of soil

I'm doing a project in junior year chemistry where I get to choose what I investigate as long as it covers course content. I'm interested in exploring how quantitative (ig. incremental) change in an ...
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12 views

SC7 and SC10 Lithology Classifications

I am looking for the full names of the lithology classifications SC7 and SC10. According to the FAO's guidelines for soil description SC3 e.g. refers to silt-, mud-, claystone. What do SC7 and SC10 ...
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121 views

What kind of soil is being worked in this video? [closed]

I have recently stumbled across this video on Youtube, where quite a magnificient building is carved into the soil with simple tools like a shovel and hoe. The location is somewhere in South America, ...
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43 views

Is it normal for clay soil to solidify into a very hard, but not brittle, material in air, and if not what might this soil be?

One part of my garden has a heavy, dark clay soil. It is now waterlogged with a lot of surface water that does not shift at all even after a day of waiting. When pressed into a 4mm thick ribbon, it ...
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1answer
125 views

How does fertile soil reach newborn volcanic islands?

When a volcanic island first surfaces, I assume no vegetation can grow, as it probably only consists of volcanic rock. How would a volcanic island like Iceland that is far from any continent grow to ...
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2answers
110 views

What is the connection (if any) between jarosite and subsoil biological activity near Spain's Río Tinto?

In the short BBC video Spain's otherworldly red river, Ricardo Amils, a researcher in Spain's Astrobiology Center says the following (amateur transcription): Río Tinto is a peculiar place in our ...
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How to make Martian soil [duplicate]

My son wants to replicate some experiments and try to grow plants in Martian soil for his A-level science project. I know NASA have managed to produce soil that mimics Martian soil, however I also ...
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How to make Martian soil

My son wants to replicate some experiments and try to grow plants in Martian soil for his A-level science project. I know NASA have managed to produce soil that mimics Martian soil, however I also ...
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31 views

How is soil thickness related to altitude, angle and moisture?

I'm trying to generate a landscape and I want to include soil thickness for realism. Data I have is altitude, angle of a given point and moisture of a given point.
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85 views

The origin of permafrost

Old permafrost is loaded with frozen vegetation. As it now melts, it is rotting and releasing methane. Doesn't that mean that it froze quickly, centuries ago, and stayed frozen until now? What ...
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27 views

solubility of rare earth sulphides at different pH?

Will rare earth sulfides in soil be more soluble in aqueous solutions with lower pH? How can I know whether these sulfides will dissolve better at low or high pH or will it not be affected?
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328 views

does silt form from sand ; does clay form from silt

I believe that sand, silt, clay are defined by size. But are they also generated by different processes and from different materials? Alternatively do sand particles ultimately weather to make silt, ...
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31 views

What's a Good Soil Quality Index for Plowed Farm Lands?

I'm currently conducting research using Satellite/Weather/Soil (Mostly Sentinel-2 Satellite Imagery) Data to Model Smallholder Farms and their dynamics before Planting. Key to my progress is to find ...
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19 views

Snowmelt erosion in USLE?

Is there any way to compute snow-melt erosion with Universal Soil Loss Equation? How can I change rainfall erosivity factor to snow-melt erosivity?
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1answer
118 views

Difference between soil Water Holding Capacity and soil pore volume?

I have got confused I took 100g soil in a funnel with filter paper. poured 100 ml water and collected the drained water in a calibrated cylinder. Water added in funnel = 100 ml Water collected in ...
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2answers
133 views

Why is the bedrock buried so deeply in much of northern Minnesota?

Although parts of northern Minnesota have bedrock exposed at the surface (especially in the Boundary Waters area and along the short of Lake Superior), the more usual situation here is for the bedrock ...
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75 views

Where are Africa's 600 million hectares of arable land located?

According to Africas Ministers pledge to commercialise regions agricultural sector Speaking during a ministerial roundtable meeting at the AGRF in Kigali, Rwanda, the leaders noted that the ...
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943 views

Is silicon dioxide (silica) found in all types of soil on the planet?

Known that it is found in sand, silt and clay but is it found in all soils?
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55 views

soil that is dried (no pore space) weight?

How much would 1 m3 of an ideal mineral SOIL that has been completely dried (all pore space is empty) weigh in Mg on Earth? Answer = ______ Mg
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275 views

Making a local geological field trip an interesting and educational event for children?

I have no expertise in geology or earth science, but I would like to do a "field trip" with my home-schooled young children (under age 10) where I could teach them about geology from a hands-on ...
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46 views

How many kg $ha^-$$^1$ of exchangeable $Mg^2$$^+$ is there in the top 15cm of this field?

Soil testing from a well-drained soil sample in 0-15cm depth of a farmers field provides the following information: • Wet weight of a soil sample from a volume of 100 $cm^3$: 200 g • Moisture ...
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89 views

Leaching Requirement

How can we determine supplemental irrigation needed to reduce soil salinity knowing ETP of a crop and the annual precipitation?
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1answer
39 views

Methane Reservoir

Analysis from the Curiosity Rover on Mars has detected tiny amounts of methane in the atmosphere. It is possible the origin of this detected methane is from methanogens deep below the subsurface. My ...
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319 views

Peaty soil vs laterite soil

The weather conditions of both peaty soil and laterite soil are the same, i.e. high rainfall & temperature. But the former turns out to become 'excessive organic' whereas the latter becomes '...
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773 views

Calcareous deposits in arid soil?

I read this line in my textbook: Lower Horizons of arid soil are occupied by calcareous deposits called kankar because of the increasing calcium content downwards. My question is that why only in ...
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28 views

Which wavelengths is limestone most transparent to?

I think of the non-ionizing range, e.g. Terahertz or Radio. Limestone clearly is transparent to x-ray or gamma but thats not what i am asking for. Natural to low ranges of porosity/water content ...
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4k views

What is the average color of soil?

Where I live the soil is red. Is there a map or chart where you can see the average color of the dirt according to geographical location? What would the color be if all of the dirt on Earth was ...
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1answer
1k views

What is the difference between Water Holding Capacity, Field Capacity and TAWC?

I am reading the paper Characterization of yield reduction in Ethiopia using a GIS-based crop water balance model by Gabriel B. Senay and James Verdin, and it says on page 3: Soil water content (SW)...
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1answer
78 views

How much excess water prevents planting of a crop

It's a generic question but was wondering if there is a threshold level of soil water beyond which planting a crop (for e.g. soybean) can be hindered because the soil is too wet or flooded. As a ...
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8k views

Is there sand in Antarctica?

There's a song "Blizzard's Never Seen the Desert's Sand". Given Antarctica is a desert, someone questioned the title's validity. BUT is there sand in Antarctica? I'd imagine yes as it's a pretty ...
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124 views

How does one find the soil fertility characteristics for islands of Hawaii?

I am trying to find a way to describe the relative soil fertility characteristics for the islands of Hawaii, Maui, and Kauai (youngest to oldest). I want to know about their nitrogen fixation, soil ...
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377 views

How eluvial process determines the difference in colour of soil layers [closed]

How eluvial process determines the colour of E horizon lighter compared to O horizon?
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98 views

Formation of minerals from decomposition of soil

I was wondering if aerobic decomposition of organic rich soils, also rich in calcium and sulfur, can result in the precipitation of gypsum. My thinking is the decomposition would release the ...
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29 views

Designing FIR or other filters for soil water content

I have 250 or so soil sensors that I need to QC. They monitor various parameters such as soil temp, soil water content, soil co2, and soil heat flux. It isn't unusual for a sensor to behave poorly due ...
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521 views

Soil Science and the carbon cycle - is carbon released from soil into the atmosphere?

Is carbon lost from topsoil when it's degraded/removed? What is the scientific process?
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3answers
2k views

What is the difference between Saprolite and Regolith?

Saprolite and Regolith both imply loose material, is one a subset of the other how can I differentiate them ?
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1answer
77 views

Does the diameter of the earth decrease because of soil subsiding due to irrigation and rainfall over the years?

I am taking a course on coursera where the instructor talks of a soil subsidence concrete post that was put there in Everglades southern Florida in 1920s. He goes on to describe the level of earth ...
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53 views

Soil metals acids and bases

I have read in environmental science textbooks that aluminum can acidify soil, whereas metals such as sodium, calcium, magnesium, and potassium can alkalinize soils. I understand that Al3+ can ...
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722 views

Why is northern Australia unsuitable for agriculture?

Northern Australia receives substantial rainfall, but its population is minimal. For instance the Kimberley region in the state of Western Australia gets more than 20 in. of rainfall per year, but ...
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3answers
99 views

Reisdual soil and the atmosphere influence

My text books says that the residual soil shows a similarity in its chemical composition to the original rock beneath it, and that the degree of similarity differs by differing the influence type of ...
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629 views

The fertility of the soil

I came across this question in my book, it says: The fertility of the soil increases when there is a lot of ....... in it. The choices to fill the space were: Nitrogen - nodular bacteria - ...
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3answers
6k views

Do volcanos really create fertile soil?

I'm developing an ecology for a portion of my world that's geologically active and I remembered hearing that volcanic ash in soil makes it more fertile to agriculture. After extensive googling I've ...
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260 views

What is the difference between the Hydraulic diffusion equation and the Richards equation in groundwater dynamics?

What is the difference between the Hydraulic diffusion equation and the Richards equation in groundwater dynamics? I want also to understand the difference between the different storage coefficients (...
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30 views

Can caliches form in arctic soils?

Caliches are signature features of many arid soils. In addition to the typical places of formation in deserts, they also occur in parts of the Tibetan plateau. Can they also form in polar climates? If ...
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288 views

Is it true that aquaponics yield crops with a lower nutritional value than soil-agriculture?

I read this article, in which a person claims that Aquaponics bring crop quality down by having more water than actual nutritional value. I have read many other sources that say the opposite. Can ...
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4answers
619 views

How can poor tropical soils be enriched by biological means?

I have been reading a lot recently about agriculture in Africa, and one of the big impediments in a lot of places is the poor quality of the soil. Primarily this refers to a lack of usable molecular ...
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2answers
3k views

Are there any areas on Earth with purplish-colored soil/sand/rock/land?

This sort of comes from my related question, but only sort of. Are there any areas on Earth with purplish-colored soil? The purple tint would come from some mineral, perhaps deposited by rivers or ...
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1answer
2k views

What is the difference between lunar and earth soil

I know that the moon has lunar regolith and earth has earth soil, but what is the difference between them?