APES Video Notes 4.3 - Soil Properties

Check out the AP Environmental Science Exam Ultimate Review Packet 👉 www.ultimatere... Check out the slides used in this video and lots more APES resources in my link tree 🔗🌲 👉 linktr.ee/jord... APES Video Notes for Topic 4.3

[@noornasser9133]

you could do a mason jar test, to test the soil texture. By measuring the percentage of silt, sand, and clay, you would know what the Farmer's soil texture is. With those results, you might be able to identify, if it needs more sand, to make more water go through, or if it needs more clay so that it has better retention. This would depend on the results, and on the crops they are planning to have there.

[@brycelancaster4175]

This is so ferda‼️ Upper decky gum pillows, zymmy nuetron‼️

[@Mr.Smedes]

Thanks, Bryce! Make sure to tell the boys to like and subscribe.

[@anniaengel2161]

Thanks for these wonderful lectures! My students are so grateful. Did you choose to put 4.6 Watersheds in a different unit?

[@anniaengel2161]

@@Mr.Smedes Thanks so much! Almost to Christmas break! Hang in there!

[@nimaysathiskumar6721]

Can you provide the Powerpoint slides in the description next time in your videos please?

[@nimaysathiskumar6721]

@@Mr.Smedes thank you so much

[@vrajparikh2255]

I have been told sometimes that clay is more porous than sand, but sometimes vice versa. Could you explain this.

[@Mr.Smedes]

Hey Vraj, great question! This is a tricky topic. Clay is actually more porous than sand, because it's particles are smaller and therefore it has a greater total ratio of pore space to solid clay particle space. Sand has larger pores, though, and therefore a greater permeability to water. My explanation in this video is a bit off as I'm approaching this concept from the scope of typical APES exam questions in which permeability and water holding capacity of soils are the main focal point, not the technical definition of total pore space volume. I'll try to go back in and add a correction to it, but you've been the first to notice this. Good eye!

[@vrajparikh2255]

@@Mr.Smedes thank you. So is silt more porous than sand due to smaller particles?

[@christine2394]

Hey Vraj, please help me out I’m confused.

[@FlickeringStatic]

​@@christine2394 Basically, they said that the strict scientific definition of porosity would make clay "more porous" than sand. For AP Environmental purposes -- I assume you are also cramming for the exam -- clay's porosity is a type we don't need to worry about.
For APES, you need to know that the large spaces in between grains of sand make it easy for air and rainwater to seep through, while the tiny grains of clay stick tightly together and don't have much room for air or water to get in.
Hope this helps!

[@bokermanjones31]

W videos bro, ily