The P-Tumati Distribution

Author: Pavan

  • Don’t be so sensoritive, man.

    Continuing with the plug-progress theme, here’s the status this week:

    The core-plugs have actually all spread out. The frustrating part is that I didn’t hit this area with kyllinga killer so I’m confronted with kyllinga growth masking the spread of the runners. I’m just going to let it fill in green and hit this hard once I think the grass can take it.

    This is a closer look at the situation:

    You can see the low, close to the ground blades of the floratam spreading out, but there are also large clumps of kyllinga competing for the same space.

    Some of this kyllinga problem is that I’m watering very frequently to support the growth of viburnum bushes in the same irrigation zone. I can’t pull back on the water. The kyllinga just hops in everywhere it gets a chance. This weed is a real nuisance.

    I’ve also started to get a sense of the peaks and valleys in the moisture sensor data. I’m trying to get a sense of peaks and valleys so I can (manually) calibrate irrigation zone operation to respect a minimum and maximum:

    I wish I had the data from the winter. The damage I have in my lawn, I think, is from Take All Root Rot. Wherever the municipal irrigation failed, the water ran through a channel. When the water didn’t evaporate quickly and pooled, it created problem zones that just failed to allow the grass to recover in the spring.

    I looked today whether some of these areas were completely dead, and they weren’t. It just appears that I need to hit the leaves iron and turn things around so the roots can heal eventually. I’m still trying to learn how to do this, and I’m hoping I can fix the damage myself.

  • The moai learn, the better I get

    If you ever visit a Home Depot in Florida during spring, you’ll instantly know it’s a wild place, especially the outdoor gardening section. People are rushing to the aisle with Black Kow manure, loading up carts before others arrive. It’s like the Tickle-Me Elmo craze of Christmas past, but instead of Elmo, it’s bagged cow poop that’s good for plants. Just being in such a crazy environment makes you want to try something new or have a personal project in mind.

    On one of my Home Depot weekends, I ended up buying a plant called Lemon Coral Sedum. It seemed like the sort of plant a questionable character like me could manage. I ended up putting a pot of this stuff outside my front door and noticed that, without any real care, it would naturally just spread and grow on the nearby rock beds. I didn’t so much as have to water it. There were just a sort of spongy, small growths that showed up nearby without any real human intervention. I’ve been letting the “weed” spread, collecting the growths, and putting them inside 3D-printed pots:

    I’ve always wanted to visit Easter Island. This is the best I can do.

    It’s wild how you can start out 3d printing circuit board enclosures and up with Moai with succulents growing out of their head.

  • Bermuda Experiment Update

    I haven’t really actively watered the Bermuda experiment since I was satisfied with seeing the different grass blades, but Scott’s common Bermuda absolutely took off even faster than the 2x-Pennington variant.

    I wish I had the resolve and fight in me that Bermuda grass has — I’d be a more successful human being. I guess I’ll just let it serve as inspiration:

    Bermuda grass!

    I’m very tempted to try and do a controlled region with this grass, but I believe working with it is like working with dynamite. All of my experience so far suggests that I cannot contain this grass in any meaningful way.

  • Moisture Sensors

    One of the ongoing problems I have in my irrigation system is that I think the zone grouping for the irrigation controller makes no sense. There are sections that need less water and other sections that need more water, but there’s no real way to decouple the total amount of flow to a specific area within a single zone without putting effort into physically changing the sprinkler heads. I also don’t have any sort of insight on what makes sense if I were to tweak sprinkler heads. My preference would be to split the zones, but apparently the trouble zone is in a “difficult” location.

    I’m attempting to gain some insight on this problem by looking at how different zones register in terms of soil moisture if I change the frequency of watering or with various settings. What I know from reading various internet forums is that the root system in one area could end up stunted if I don’t allow for deep watering. I’ve planted some sensors, and I’m already noticing that I’m still in over-watering territory even after dialing back my settings. If I can find some compromise here that works, I’d consider that a win. Here’s a recent sampling of data with a new sensor — there’s not enough data yet, but it makes for some nice blog color:

    Screenshot

    Plug Progress

    Oh, and here’s the plug progress. Things seem to be spreading, albeit slowly. (Some of the greenery is because I still have a Kyllinga infestation — it takes repeated application of herbicides to get rid of this damned weed.) I think the progress is quite visible relative to the photos from the first post showing the plugs being planted.

  • Plug Progress: Keepin’ it Reel

    It turned out that the reason there was so much devastation in my lawn is because the time slots that were programmed into my irrigation controller coincided with low municipal water supply pressure. The system was programmed to fire at 3:30 a.m. I wasn’t quite sure what was going on, so I placed little water collectors over the lawn to analyze the distribution of water:

    The Real Killer:

    When the boxes weren’t registering with water and there were soggy spots, I realized what had happened: the pooling zones contributed to fungus before the temps warmed up. The fungus weakened my St. Augustine and opened me up to weeds and Bermuda. My short cutting of the lawn didn’t help; however, had the irrigation been fine, I’d likely have been fine. I’ve halted mowing until I have an adequate green up, and then I’ll manually trim the height to the recommended 3-4″.

    It became much easier for me to manage the diagnosis of these problems after I installed a Wi-Fi unit into my irrigation controller and started observing behavior by triggering the app and zones as needed.

    The Real Kyllinga:

    The wet pooling zones contributed to another problem — kyllinga. I had the yard sprayed with Dismiss to blow away the sedge and the kyllinga. I have unsightly brown spots with dead kyllinga, although it looks like I need to hit the yard again in a few weeks to really manage this infestation.

    Plug Progress:

    Two weeks ago, I dropped plugs on the area where the sedge and kyllinga died off. The original photo was on or around April 7th. On April 21st, I am seeing extremely healthy plugs with very beautiful green growth. The eastern end of the plug patch is seemingly filling in. I did not hit this area with Dismiss; I’m just going to deal with the remaining weeds after the grass gets a stronger foothold.

    One thing about lawn issues is that the “debug cycle” to diagnose real problems is much longer than for diagnosing problems in something like software. The process of being forced to understand the process is helping me develop a real skill: being patient.

    Here’s a current photo of the progress below. (You can even see the dead kyllinga at the bottom.) The plugs themselves have greened up quite a bit — I’m just waiting for the runners to take off.

  • Plug’n Play

    This past week I realized the reason the verticut on the St. Augustine grass went poorly is because my irrigation system is broken. I’m waiting for irrigation repairs. (I tried tinkering with Bermuda plugs, but because of irrigation issues, most of my Bermuda plugs didn’t come out looking so hot. I’m toying with the idea of creating an isolated Bermuda zone to alpha-test the idea of converting to Bermuda grass.) In the meantime, I’m coming to terms with the sheer amount of turf-grass madness going on in my lawn.

    Last season, I had a professional come by and spray herbicide, not fully comprehending how weedy the lawn I acquired actually was. The professional basically said the nutsedge would sort of wilt away, but the remaining grass would stay somewhat healthy. What he didn’t explain was that where there were large pockets of sedge grass, I’d have a giant barren spot that would subject me to erosion and other dilemmas. I happened to have multiple spots like this.

    I’m just going to come out and say it: I can’t stand nutsedge. It’s only April, and this menace is everywhere. I power raked and tore up the dead zone where the previous nutsedge was and dropped plugs. It took some time and a lot of rewinding and replaying videos from people who seemed competent on YouTube:

    St. Augustine plugs (before pouring on compost and leveling sand)

    I have no idea whether this will work as I am a novice, but I enjoyed sweating in the hot Florida sun. It was a nice break from the sorts of problems I encounter on weekdays.

  • Bermuda Growth Rates

    Continuing the life of a grass-blundering fool, I’m still committed to the slow expansion of Bermuda grass, even though I’ve plugged parts of my lawn with St. Augustine where things have gone bad.

    You’re not supposed to seed a Bermuda lawn because of color mismatch — or so I am told on the lawn care forums. The patch growing on the west side of my lawn has this deep, dark emerald color that I wish I could match. But, just to test the theory out on seed coloration, I bought two random bags of grass and put the seeds on both sides of the pot:


    Supposedly, the Pennington “Smart Seed” variety was supposed to grow at 2x the rate. The seeds themselves were a different shape and color than the seeds from the Scott’s bag. Below in the photograph, I put the Pennington on the left of the pot and then the Scott’s on the right side of the pot. (The pot just has some potting soil in it, but I don’t think this affected the result too much.)

    Sure enough, around 2.5 weeks out, the Pennington grass is growing much much more quickly. The Scott’s grass is there if you look close enough.

    More importantly, though, the coloration on this grass is nowhere near the deep dark emerald color that I have growing on the lawn now. The forums are correct about seeds. I plan to transplant some of these seeds into an isolated zone to tinker with the fertilization parameters in different areas and test out different shade levels. Let’s see how that goes.

  • auto *presence = new DigitalPresence();

    I’d been submitting patches in anonymity for a while to various open source projects without commenting too much.  I was content to be a passive participant, but over time I’ve come to realize that technology and research projects are fundamentally social activities.  Not being part of the give-and-take in the community means missing out on a lot of meaningful interactions (including the occasionally necessary heated debates and flames) with other intelligent developers.  Moreover, with the presence of services like github which encourage “social coding”, it became harder not to pulled into the mix.

    Technology is great, but love for it tends to be nurtured by the often interesting, diverse, and dedicated people who take part it its creation — these are the people I am ultimately thankful to and whose efforts I am thankful for.  I didn’t want to start writing anything technical before giving any sort of credit to the people who’ve assisted me along the way.

    With that having been said …. First post!

    -Pavan Tumati