/r/Soil

Photograph via snooOG

A subreddit for all things soil, or soil science related.


The Soil reddit

Soil - a natural body consisting of layers that are primarily composed of minerals which differ from their parent materials in their texture, structure, consistency, color, chemical, biological and other characteristics.

Wikipedia: soil


Rules

  • Please keep all discussion to soil or agriculture based topics

  • Please try and post scientifically sound articles (i.e. that include sources) but all soil posts are welcome

  • Feel free to ask general, or homework related questions. We are a small sub, so an answer may take time, but we will try and get to it!

  • No advertising, or corporate promotions


Resources

The Nature and Properties of Soil

Soil Fertility and Fertilizers

An Illustrated Guide to Soil Taxonomy PDF

The Canadian System of Soil Taxonomy PDF

USDA Handbook on Erosion Control PDF

Soil Sampling and Methods of Analysis PDF Canadian Society of Soil Science


Related Reddits:

And Check Out the Big List of Related Reddits

/r/Soil

13,827 Subscribers

1

Soil- systems map & paper

On the kind advice from this sub, have started a public systems analysis map for how to improve the health of soil. You can find it here: https://Kumu.io/Twendara/twendara-soil

There’s also a paper that relates which is doing a round of QA. If anyone wants to have a look, please let me know?

3 Comments
2025/02/04
12:16 UTC

1

Advice needed: 1 acre .75 acre to rehabilitate

I have .75 acre of builder fill dirt that I with to rehabilitate. It is current grassed (if you could call it that). I was thinking of mixing a bunch of horse manure, wood chips and dirt with the skid steer and sewing up a "base layer". This will then be grown out as a meadow while we figure out what to do with the space.

Current ground is clay with a very minimal layer of top-soil and very "builder grade" grass on top. This is in Snohomish, Washington.

Any recommendations on "recipes" or approaches for this?

Thanks!

3 Comments
2025/02/04
05:31 UTC

0

Good day all, was hoping if somebody would be able to tell me what kind of soil this is? Found in my local forest of spruces that recently have fallen due to storms.

Am I correct in saying that the light coloured is sandy clay the grey coloured is clay and the dark coloured is peat?

2 Comments
2025/02/03
16:25 UTC

13

Happy World Wetlands Day

Happy World Wetlands Day!

We’re honoured at the Tuhifadhi Mchanga Initiative to join our country, Kenya, and the rest of the world who’ve adopted the Ramsar Convention on Wetlands in commemorating this day and championing the protection and sustainable utilisation of these vital resources.

As advocates of soil health and sustainable land use, we recognise that wetlands and soil are intertwined.

Wetlands are often associated with water, but beneath their surface lies an equally vital element—soil. Wetland soils, also known as hydric soils, are unique because they form under saturated conditions, creating environments that support diverse plant and animal life—wetlands cover only around 6 percent of the Earth’s land surface but are home to over 40% of the world’s biodiversity. These soils, often organic-rich, play instrumental roles in carbon sequestration and nutrient cycling.

To celebrate this year's theme of “protecting wetlands for our common future,” we have unraveled this correlation between these two natural elements and echo this belief that to secure our future, we must restore and conserve the delicate balance between wetlands and soil.

Explore this unique wetland-soil nexus proving to be a lifeline for many ecosystems.

#WorldSoilDay2025 #TuhifadhiMchangaInitiative #SoilHealth #TMICares

0 Comments
2025/02/03
01:03 UTC

28

Soil appreciation _ luvisol

Pefect luvisol with old A1, E, B21tdark, B22t, B23t and begining of B3t horizons. Northern France. 2015.

1 Comment
2025/02/02
11:53 UTC

0

Soil mechanics

Are there here any soil mechanics experts for educational purposes?

0 Comments
2025/02/01
18:23 UTC

1

Soil type and infiltration rate

Hello, I want to know what the best field test to perform to find the soil type. I usually perform the manipulative and Jar/bottle tests to verify it.

P.S the manipulative test is the one where you make balls and sausages of the moisture soil and see how long it can go before it starts to break!

1 Comment
2025/02/01
08:59 UTC

1

where to find silt / clay / loamy soil for purchase

project

10 Comments
2025/01/31
20:57 UTC

3

what thermometer for hydrometer texturing method?

what title says. Is there a specific type of thermometer I should use? does a digital probe work?

edit: also my lab is not a soil lab and we don't have the typical supplies. Does a 500ml cylinder work and how would I change my methods if I use 500ml instead of 1000ml cylinder?

6 Comments
2025/01/30
22:28 UTC

5

Soil mites?

Hello, I had this fertile soil to make a bioactive enclosure, and I always kept it moist to get some springtails. I forgot to check it for 3 days and today when I was checking the soil, I had some springtails in there, a spider and these little beings that I don't know what they are. They were all clustered when I picked them. Do you guys know what this is?

7 Comments
2025/01/30
01:39 UTC

6

Soil Jar Test

What kind of soil is this? I took this picture 2 hours after shaking the jar

7 Comments
2025/01/27
15:41 UTC

10

Is soil science worth it?

Hi! I'm a shs student in the Philippines. I hope to reach out for those who took soil science as a career. My teacher in Science inspired me to take Soil Science in the future. However, from what I heard many changed careers. May I ask why po? And I'd like to ask if Soil Science is worth it in terms of its salary? Family finance is not so good, there are a lot of struggles, so I'd love to help with that once I'm done with college. That's why I'm asking if Soil Science gives good pay? And how much on average? Please help!

5 Comments
2025/01/26
10:00 UTC

11

BOOK ABOUT SOIL

I have a deadline tomorrow and an instructor at a soil institute told us that there is a book by Tubach?? That can help us for our project

THE PROBLEM IS I CANNOT REMEMBER THE AUTHOR OR THE NAME OF THE BOOK

IT’S SOMETHING LIKE ESSENTIALS OF SOIL SCIENCE OR FUNDAMENTAL OF SOIL SCIENCE

PLEASE I REALLY NEED IT

or you can recommend books about soil weathering and soil types

12 Comments
2025/01/23
12:33 UTC

5

Land reclamation.. any idea what to do for this salty part of the land?

7 Comments
2025/01/20
12:39 UTC

120

updated soil classification chart

5 Comments
2025/01/20
00:08 UTC

1

Using charcoal for reducing fertility for wildflower meadow creation?

I'm not sure if this is an old idea or just a stupid one but, I was wondering if charcoal could aid meadow creation.

When attempting to make a wildflower meadow from a previously grassy area, the nutrient level of the soil needs to be depleted to allow wildflowers to compete against the more vigorous grasses. This is usually done by hay cuts (removing the cut material) or grazing at specific times to remove the nutrients in the grasses. Over time, along with disturbing the surface to weaken the grass, the application of parasitic flowers like yellow rattle and seeding, the meadows can return to a better state for biodiversity.

So I was wondering if you could maybe apply uncharged biochar - as in, charcoal - to the soil as part of the process. Knowing that the char will leach the nutrients from around it, effectively reducing the fertility more quickly than with other methods alone. Whilst it would, in future, increase the quality of the soil and the potential for nutrient carrying, it wouldn't actually in and of itself increase the nutrient load so wouldn't end up being counterproductive.

Or would it? I really have no idea! Any thoughts?

13 Comments
2025/01/19
10:40 UTC

1

Soil testing

I live in karachi pakistan I want to study soil testing certification any anybody have any idea please guide me through it

1 Comment
2025/01/17
09:37 UTC

5

What’s your data collection app o’ choice?

Hope this is okay here. I am a noobish consultant and got an Arrow 200 GNSS receiver for my firm. What field collection device software/app does everyone use for pairing to an external receiver while doing delineations, sample location, habitat mapping, etc.? Thanks!

4 Comments
2025/01/16
03:19 UTC

7

Systems thinking and soil

Might anyone know or have a copy of something that brings together these two? Something that would look like a classical systems thinking map, but the content is soil information? Thank you so much!

7 Comments
2025/01/15
12:12 UTC

6

What am I looking at here?

I have what is known as "poof dirt" by the locals. I'm on just over an acre and It goes down as far as I can dig. It's powdery soft, not compacted, blows everywhere on windy days, and sticky when wet. Is this pure silt or clay and how should I amend it for a vegetable garden?

Any help appreciated, thank you!

7 Comments
2025/01/14
00:13 UTC

5

Hello I’m a new Gardner I plan on growing tomatoes in containers (how’s my recipe?)

I haven’t grown any vegetables before, I’m planning on growing tomatoes in 10 maybe 15 gallon buckets. I want to make 80 gallons of soil I want to have extra just in case. I have made the following calculations to decide what I need. I wanted to make a simple mix. From what I’ve looked up ice decided to do. 50%, 30% peat/coco mix and 20% drainage pearlite/ vermiculite mix.

How is this mix will this work, I’m planning on doing organic growing .

The 3 varieties I’ve decided to grow are Matt’s Wild Cherry, garden gem, and last is undetermined still maybe a determinate that’s known to do good in containers. I’ve

19 Comments
2025/01/10
07:49 UTC

3

SOIL SCIENCE CAREER ABROAD

Hello! I'm a soil science major from SE Asia, is it possible for me to practice my major abroad? Is there any career opportunities there for me as a soil science major from another country? And is there any examination/certification I have to attain? Thank you so much!

1 Comment
2025/01/08
01:52 UTC

8

What’s the Most Unusual Thing You’ve Done to Improve Your Soil That Actually Worked?

I’ve been experimenting with different ways to improve soil health in my garden, and it’s amazing how these methods can make such a difference. Recently, I tried using partially broken-down leaf mold as a mulch layer, and the difference in moisture retention was great. I'm sure it wasn't specifically because of the leaf mold (more so the mulch), but with all else being equal, it was pretty good!

This got me wondering—what’s the most unusual or unexpected thing you’ve done to improve your soil, and how did it turn out? Maybe it’s using biochar, brewing compost tea, or even something wild like burying fish scraps.

Thanks!

6 Comments
2025/01/07
19:50 UTC

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