
When I blogged about Tim Wheeler's free Irrigation Workshop last week (sponsored by Pasadena Water and Power), I mentioned I'd learned how to test my soil type. Some of you asked how it's done. It's called the jar test. Let's play along.
In the first photo, we put two cups of dirt into a common jar.
Well--it's kind of a nice jar, but if yours is common don't worry.

Then leave it. Yes. Just leave it alone for a whole 24 hours. I said so, don't mess with it. Let the dirt settle. It's not an actual margarita.
What's supposedly going to happen is your dirt's going to stratify into three layers. That's what they told me, anyway. It's going to layer itself according to particle size. The biggest particles, sand, will form the bottom layer. The middle layer will be silt (medium-sized particles). On top will be your lightest particles, or clay. When you see what percentages you have of each of these soil types, you can compare your soil to a soil triangle and figure out your soil type.
