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Saline and sodic soils - the difference
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- Опубліковано 19 жов 2014
- Soil salinity and soil sodicity are often confused. While they both involve sodium, they have very different effects. This video clearly demonstrates the difference between these two land managment issues.
This video is aimed at a wide audience from farmers and land managers, to students and natural resource professionals.
I am in soil science right now and these videos help. There is so much to learn and it is all not easy !!
Thanks Mo, that is so great to hear.
Hello :) I am a viticulture student in the southwest U.S. and currently studying soils. This video was perfect in the explanation and differences of salinity and sodicity! Visuals and examples are much more powerful for me to learn, i appreciate you having made this video! Thank you!
Hi Lacey, we worked hard on the narrative for this short video and wanted to keep it simple and still ensure it made sense. Happy to hear that it worked for you. Thanks!
I have studied agriculture but professors never explained this topic in this practical manner
Im a Ag student and this video has been really helpful, thanks :)
from which university you are doing your degree
Thank you
Excellent video, covers everything perfectly
Thanks for reaching out, that's good to hear
Hi Victoria Gauld, Thank You very much!! I am so pleased to hear that.
Passing on knowledge of soils and landscape processes is what we are all about.
Sally McInnes-Clarke
Thanks did not know that! I'm very interested in what salt does and how to find plants that will grow ,also find ways to manage the problems caused by salt
This video helps me to explain the difference between salinity and sodicity to my students
This is a super easy to understand video. Great stuff!
Thank you Neil great to hear that it has been helpful.
Thank you! I needed a visual to remember for my soil science exam :)
Excellent - good luck in your exam!
great vid thank you
Thanks for the information
Great description of difference between sodicity an salinity. I've been trying to find different sources to describe why there is low EC in sodic soils. You would think EC would be higher than saline-sodic, but by definition it is lower. Similar SAR, but lower EC in sodic.
Thanks Robert,it all comes down to soil chemistry, but essentially saline soils have high dissolved salt in the soil water, sodic soils that are dispersible don't. Salinity and sodicity do the opposite to soil structure. Saline soils don't disperse, while sodic soils do. You can observe this by adding one lump of sodic clay to a glass of freshwater and another to a glass of saltwater to see the difference!
@@nswsoilknowledgenetwork2890 Thank you for your quick and thoughtful reply. So the EC is lower in sodic soils (below 4) because the sodium is stuck in the soil and won't go into solution so it can't be read by EC meter?
Thank you for a good information
Thank you so much. That was so useful.
Thats great. Thank you!
For my assignment I am supposed to investigate soils in South Africa. One of the properties is said to be: sodic, and the property is long and comparatively narrow, stretching from upland to lower reaches of an elongate drainage basin. -
Do I understand it correctly that because of the sodic soil and the water of the drainage basin the ground is probably unstable especially at the low end of the slope? Because the Sodium in the clay minerals is reacting with the water.
Great Info. Thanks!
Hi nvrmindthebollocks, Thanks for the feedback, we are pleased that is was useful.
Very useful video. My house is located near potassium mines. it is very difficult to plant anything, the soil and water are salty.
+Wizard S
Thank you. I'm glad you liked it
thanks
very useful
thank you very much, now i get it
Thank you Moreblessing ! That makes me happy
Hi, great video. Just one question though, doesn't the Na have to be in ionic form to be moved around the soil in water? So does it then revert back to its salt chemistry and form Na Cl2 and reside in the soil as a salt? Is that soil salinity? I get the sodic soil as Na ions attaching to cation exchange sites on clay, does that mean just not all the Na attaches to clays and is left to roam as free Na? Ok it was more than one question.
Hi Shaun,
I have sent your question to the SKN soil chemistry brains trust and will reply asap
Hi Shaun,
We have two soil chemists in the group and they have both responded to your question. The first reply is -
Na is always in its ionic form, Na+, in soils. Never in the metallic form.
When the Na+ is attached to a soil (which has a net negative charge) it is referred to as “sodicity”.
When the Na+ is not attached to a soil clay, that is “free” or “soluble” Na+, the positive charge is normally balanced by Cl- or HCO3- and sometimes SO4-- and NO3-. That is ‘salinity’.
The second reply is -
Sodium is always in its ionic form (Na+), but it can often attach to the negative surfaces on, or in rocks or soils.
If all the available CEC sites are filled with sodium, then if there is still more sodium (often attached to chloride), it can move freely about and the soil will be sodic and saline.
Hope this answers your question.
Thanks a lot for that, I didn't expect you to come back that quickly. I have a soil science exam coming up and this helps.
You're welcome. Good luck !
Excellent video...If it had spanish subtitles I could show it to my students...!!
Sir my land soil type is loam. Sir what fertilizer is best for loam type soil.
Plant pig face succulents or salt bush and or tomatoes
Thanks very much for your video. I have the question please, What is the soil type for the wheat crop in NSW? Is it clay or clay loam?
Thank you ! Wheat grows in several different soils. In central NSW it grows in red and brown chromosols and dermosols, topsoils are usually clay loam and subsoils light to medium clay. In northern areas it also grows on black vertosols. Topsoils are usually light clay and subsoils medium to heavy clay.
For more info check out our ICONIC SOILS videos for red chromosols and black vertosols
upload in telugu also