Who the hell is Sandy Loam?
Areas with loam touch all three sides. So… Some kind of loam exists without sand, some without clay and some without silt. I am not a soil scientist but I’d guess that any substance that contains neither is a kind of loam.
I need a diagram about how to read that chart.
print it, get a shovel, go dig in dirt.
I’m a Sandy Loam truther.
I know that triangle because of Dwarf Fortress
Dig dig dig
Random question but how would one implement that chart as a set of rules for a game? Only thing I can think of is drawing the polys and casting a ray to find which poly it hits.
Not a programmer, but all this is is a representation of three columns of data in a table, plus a fourth for the label. Make a lookup table with 4 columns. Now make rows with the data in it, assigning the label for each.
This chart is just a nice way of representing 3 variables in 2D form. It’s just an XYZ graph in 2D. With the constraint that X+Y+Z <= 100. You could even assign functions for those different labels.
Though, me not being very good at maths, I’d have no idea how to write a function to cover those areas.
Probably easier just having a lookup table.
As an example, though, a line going from the top of the triangle to the bottom, in the middle would be:
Clay(silt,sand) = 100 - Silt - Sand, where sand=silt Thus, Clay = 100 - Silt, where Clay+silt+sand<=100 would be a vertical line on the chart.
I think. I’m just having fun trying to work this out, without looking it up now.
If I print this off and put it up in the Earth science department, will it start a war?
Probably not. I’ve seen this chart in multiple geotech companies. It probably gets pointed at a lot when another contractor goes “but this is obviously sand!”
Not a gardener huh?
I love it when you talk dirty to me
Wait is dirt triangle a lie?
Why does dirt triangle add up to >100% at all points
Because you need the follow the arrow directions and not just pick them randomly
Cause you’re bad at reading charts
How the hell am I supposed to read this chart? I picked a spot and got a total of 140%, that’s too much soil!
Ternary plots (aka Triangle plots) have three axes rotated and layered on top of each other. So when you get a point like this:
You read it as 50% of the way up the clay direction:
30% of the way up the sand direction:
20% of the way up the silt direction:
So it is 50% clay, 30% sand, and 20% silt.
You’re the greatest
The lines to follow are the ones at the angle that the little arrow points. Which is ‘down and to the right’ from each side if you put that side on top
pick a junction, follow the line to the left, the top right one and the bottom right one
It’s confusing that Sandy Loam and Loamy Sand are two distinctly different things.
Red orange vs Orange Red.
Dirty water vs. watery dirt.
One is dirty water, the other we’d probably call mud.
To me, the difference is that one is mostly loam with a bit of sand and the other is mostly sand with a bit of loam.
Who is Sandy Loam, and why can’t I reach her?
You need longer arms.
For the people who have trouble reading this chart, I skillfully tried to draw how to read it.
https://fedia.io/media/6f/2c/6f2cffd115c4699b72589a753ebd618a0b818eeb53c28300cc808e69a945786d.jpg
Sorry, I’m illiterate.
if yous illiterate yeh, ows you earin en? euh?
Man I’ve gone my whole career without ever dealing with this BS. We use USCS. One time my boss had to deal with it because of some permitting shenanigans with an agency (USDA?) and he said it was stupid.
It makes more sense if you use it as intended. It’s designed to be a simple way for farmers/gardeners to classify the basic soil composition by particle size.
Take a cup of dirt, put it in a mason jar, fill it full of water, put a lid on tight and shake the hell out of it. Come back in 3-4 days and measure the layers.
This comes in helpful in applying pesticides and basic water management. It’s pretty much pointless for anything else.
I can’t ever see that chart without thinking of Dwarf Fortress.
What’s cool is that I have no idea what the fuck that graphic means, but it’s still hilarious because the arcane nature of it makes sense in context.
That is good memeing
