Questions tagged [soil]

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19 questions with no upvoted or accepted answers
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11
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Using sodium chloride load as a point source pollutant variable in SWAT model?

I'm currently working with the Soil & Water Assessment Tool (SWAT). My task is to model the loading of sodium chloride into streams. One approach I would like to take is to use the point ...
5
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0answers
104 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 ...
4
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0answers
50 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 ...
4
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0answers
243 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 (...
2
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0answers
28 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 ...
2
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0answers
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 ...
2
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0answers
32 views

Is there a way to calculate difference initial water content, from curve number method?

I want to calculate difference between initial water content of a soil given that its saturation water content can be found from its type. Is there a way to find initial water content of that soil ...
1
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0answers
15 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?
1
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0answers
14 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?
1
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0answers
53 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
1
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0answers
41 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 ...
1
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0answers
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 ...
1
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0answers
90 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 ...
1
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0answers
12 views

Searching for database for Colorado soils that goes back to 1990's

Are there any database for the soils database out there beside NRCS ? I am fully aware that NRCS has their database on their website but I was wondering if there is one that can't i find them ? I am ...
1
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0answers
39 views

What field data do I need for the Green-Ampt infiltration Model?

I want to estimate infiltration in a soil. What kind of parameters should I be measuring in the field?
0
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0answers
25 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 ...
0
votes
1answer
42 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 ...
0
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0answers
56 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 ...
0
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2answers
72 views

Leaching Requirement

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