4.8 • 1.6K Ratings
🗓️ 27 January 2020
⏱️ 6 minutes
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Bulk density is a phrase I hadn’t heard in relation to soil mixes, so on today’s show Paul from Aliki Gardens explains what it is and why it’s important to know.
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Paul is the owner of Aliki Gardens, a local San Diego soil company with a focus on creating high-quality soils to support a regenerative agriculture approach. He’s also been involved in cannabis cultivation for 10+ years.
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0:00.0 | What's up everyone? |
0:02.0 | What's up, |
0:04.0 | what's up? |
0:05.0 | What's what's up everyone? Welcome back to the Epic Gardening Podcast. We are joined |
0:17.1 | again by Paul of Aaliki Gardens, which is a local to me, San Diego Soil Company that focuses on creating really high quality soil mixes that support either a regenerative agriculture or a no-till style approach to farming. |
0:32.0 | So we've been talking quite a bit about style approach to farming and gardening. |
0:32.8 | So we've been talking quite a bit about some of the finer details |
0:36.3 | of creating soil mixes and the interactions of all the different variables that |
0:41.0 | go into what makes up what we call soil. |
0:44.2 | And another topic that I thought we could dive into, Paul, is something called bulk density. |
0:50.4 | So I thought, of course, with any of these things, it makes the most sense to kind of explain what that term even means to start it out. |
0:57.0 | Yeah, thanks Kevin. One of the aspects of our of our soil formulation is checking the bulk density. |
1:04.4 | And what that means is how dense is the media that you're growing in. |
1:09.0 | Will it allow for the infiltration of water? how does it affect root depths or restricted in some cases? |
1:18.8 | We consider how does the bulk density affect the water holding capacity like we talked about yesterday, the |
1:24.9 | soil porosity, the availability of plant nutrients and the soil microorganism activity. |
1:31.8 | All of those would be affected by bulk |
1:34.0 | density and with the soil sites the way bulk density is calculated there's an |
1:40.8 | assumption that rock like a solid rock is 2.65 grams per cubic centimeter. |
1:49.1 | And so when you're taking a look at field soils, the ideal growing soil for most fields would be a |
1:56.8 | filthy loam. And so that would be a mix, a pretty even mix of sand, silt, and clay. |
2:03.4 | And so when you're making potting soils |
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