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Questions tagged [soil]

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2
votes
1answer
602 views

How does soil fertility differ between Scandinavia and Russia

How is climate and soil fertility different in Scandinavia comparing to Russian territory of 1500s? Did Scandinavia have more favorable climate and more of arable and higher yielding soil than Russia ...
7
votes
1answer
211 views

Was Russia's original territory unfavorable for agriculture?

How favourable were the soil and climate in Russia's landmass of the 1500s for growing crops in comparison with Northern European countries?
8
votes
3answers
528 views

Seeking details for the “historical rate” of arable land loss

In doing research on the issue of desertification (aka land degradation) I keep running across the same basic sentence but no source or detail to support or clarify it: "Arable land loss is ...
5
votes
2answers
598 views

Red volcanic soils - what are the likely constituents?

I live very near an extinct Andesite volcano and hiking in that area I've noticed bands of soil that have a dark red coloration. I've also been in Kauai, one of the volcanic islands of Hawaii, but ...
6
votes
1answer
413 views

Removing agricultural plastic film waste after 10+ years degradation [closed]

I am at a farm where previous tenants left a non-biodegradable plastic film roughly 10-15 years ago. It is inconsistently spread over a few acres and was not discovered until we attempted plowing the ...
3
votes
1answer
512 views

Dynamic cone penetrometer (DCP) results and correlation

I have been reading about DCP and watched a video of how it is done (the video is not in English). But there are something things that are still unclear and I would greatly appreciate some help and ...
9
votes
1answer
113 views

Traits of invaded ecosystems? Are my compost worms a threat to New York?

I was shocked to learn that there were few native worms in the glaciated portion of North America. I use worms indoors to compost paper and kitchen scraps. I don't think there is much chance of ...
11
votes
0answers
126 views

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 ...
10
votes
1answer
121 views

Cell Size of Salt Pan Tessellations

Salt Pans (such as in Badwater Basin of Death Valley, California) often show a tessellation pattern which forms presumably due to contraction of the deposited salt crust forming irregular cracks ...
13
votes
1answer
8k views

What is hydraulic diffusivity?

I'm having trouble grasping which properties of the soil are described by hydraulic diffusivity (sometimes referred to as soil-moisture diffusivity which is based on the diffusion equation). What ...
10
votes
1answer
456 views

Why is a layer of the subsoil so dark on this construction site?

I have this construction site right outside my house, which I would like to give you some geographical background about before asking my question. Have a picture first though There used to be ...
11
votes
1answer
220 views

Generic pedo-transfer functions to compute field capacity and wilting point from sand/silt/clay?

I have a model (Miguez et al 2008) that defines wilting point as the soil water content below which there is no transpiration (from Johnson et al 1993). Field capacity is defined as the volume of ...
13
votes
1answer
236 views

How does soil redox potential affect the rate of denitrification?

Denitrification requires low oxygen conditions as wells as organic carbon. Are reduced soils (e.g gleysols) more likely to have higher denitrification rates because they have low oxygen levels?
13
votes
2answers
18k views

Is soil a renewable resource?

My geology textbook tells me that soil is not renewable, and I agree with this, but there was some question in my class as to whether this is true. Some soils take more than a human lifetime to ...
11
votes
1answer
124 views

Estimate litter production

How would one go about estimating litter production (fine root turnover, leaves, etc.) for a forested area? I have some estimates from literature - which were derived from models, but I'd like to ...
50
votes
5answers
4k views

What started the US Dust Bowl of the 1930s, and could it happen again?

Most of us know about the Dust Bowl: the huge storms of dirt and dust that swept across America in the 1930's. But what I'm wondering is... What actually triggered the start of the Dust Bowl? Is it ...
9
votes
2answers
2k views

Horizon letter for bedrock

What is the official letter for the bedrock soil horizon? I know that the letters to represent the A, B, and C horizons are widespread, but the fourth layer (bedrock) is referred to with different ...