Logan Labs test results - could use some assistance reading results
coreman73
8 years ago
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morpheuspa (6B/7A, E. PA)
8 years agoRelated Discussions
help interpreting Logan Labs test results
Comments (5)Got it! Um, what's the condition of this lawn? The numbers are a little conflicted, but if you made me guess about the grass, I'd say pretty poor. EC 6.1: You don't have red clay, you have red sand with some red silt. :-) No, really, this EC is completely inconsistent with significant clay, although you could have some of the lightest, lowest-EC clays. Even so, you don't have a lot of them. Try the free at-home jar test (which I or somebody else will read) to verify this if you like. The reason it acts like clay is detailed below--all soils are tight, impenetrable, and puddly under some circumstances, and boy, do you have those circumstances. pH 5.9: Always a symptom, never a disease, and this isn't much of a symptom anyway. It's just a bit below optimal and we're going to fix that. More below under calcium, magnesium, and potassium. OM 4.0%: Right at the extreme top of the Fair range. Given your lower EC, I'd always mulch mow the lawn, mow in all your fall leaves, and seriously consider importing leaves off the curbside from surrounding properties. This isn't an extreme emergency or anything like that, but the raised OM will increase water retention, improve your soil biology, loosen the soil for you (and keep it that way), and generally nurture the roots of your lawn (and anything else you have). Sulfur 27: A good answer, with a bit less margin than I generally see, but that's not a problem here. I don't need any significant margin since I'm not using sulfate-based chemistry. Phosphorus 25: Extremely low, and a severe hit to lawn quality. Target here will be 200--eight times more than you currently have. We use starter fertilizer, the cheapest stuff off the shelf you can get. Recommendations below. Calcium 43.1%: Extremely low. Target here would be around 60-65% (modified by the magnesium). For this, we have to use calcitic lime--Encap, Mag-I-Cal, or Pennington Fast Lime. Cheaper limes contain too much magnesium, work too slowly, and require far more per unit area. Recommendations below, and we aren't going to finish this in one year. Magnesium 24.5%: Extremely high, but not as bad as it looks. Some of this saturation level is the low level of calcium in the soil, and it'll naturally drop a little as calcium flows in. High levels of magnesium make for impenetrable soils that cling together. Target for your soil would be around 12%. Potassium 6.14%: A bit high, but certainly not a problem--I like a little extra potassium in a soil for resistance to cold, heat, insects, and disease. This will naturally drop a little as the calcium flows in. Sodium 2.7%: A bit high, but the calcium will dispel this and drive a little out of the soil. If it stays high once calcium levels start to come up, we'll probably want to dispel the sodium directly. This isn't going to be a problem for the Bermuda, but it'll shift your pH upward without adding any advantage to your lawn. Sodium is toxic in larger amounts and only used in tiny amounts by plants. Minor Elements: Most are perfect. I do mention boron (deficient) and iron (low) below. Boron <0.2: Deficient, which isn't great for the lawn (quite bad, in fact; boron is used for photosynthesis and also for meristem development into functional adult cells). We use Milorganite as a carrier and 20 Mule Team Borax as the boron source. You can purchase 20 Mules at the grocery store in the laundry section. In a wheelbarrow or the like, dump the Milo. Spraying very, very lightly with water (I use a spray bottle like the kind people use to damp their clothes when they iron) will help the boron stick. Add the recommended amount of 20 Mule Team Borax and stir, spraying occasionally to get the stuff to stick to the Milo. Then apply over the recommended area. So if going for 1 bag usage over your lawn (1 bag per 2,000 square feet), you'd add 8 tablespoons of 20 Mule Team Borax. Iron 84: Not deficient, but not going to produce fantastic color, particularly as the pH rises and calcium levels come up to normal. Whenever you like, you can feed the lawn with Milorganite (it won't interact with or cause any overfeeding problems with the starter) to slowly raise this. Recommendations: Note: The starter will adequately feed your Bermuda through the season, but you may wish to tap in a little extra nitrogen. 0.2 lbs per thousand square feet per month wouldn't be a problem if you wish to do it (synthetically). The sky's the limit organically. September 1: Apply starter fertilizer at bag rate. September 15: Apply 6 pounds per thousand square feet Encap, Mag-I-Cal, or Pennington Fast Lime. October 1: Apply starter fertilizer at bag rate. October 15: Apply 4 tablespoons of 20 Mule Team Borax in 1/2 bag of Milorganite over 1,000 square feet--or, in other words, 8 tablespoons 20 Mules in 1 bag of Milo over your entire lawn. April 1, 2016: Apply 6 pounds per thousand square feet Encap, Mag-I-Cal, or Pennington Fast Lime. May 1, 2016: Apply starter fertilizer at bag rate. June 1, 2016: Apply starter fertilizer at bag rate. July 1, 2016: Apply starter fertilizer at bag rate. July 15, 2016: Apply 6 pounds per thousand square feet Encap, Mag-I-Cal, or Pennington Fast Lime. August 1, 2016: Time for a re-test!...See MoreNeed some help with Logan Labs soil test results
Comments (11)Overall, this isn't a bad test at all. There are some things that require fixing, some that should be adjusted, and many that are just fine. It's good you used the starter on her lawn; she needed it! I'll account for the usage in my calculations and recommendations, assuming you went at bag rate (1 pound of P2O5 equivalent). Sample Depth 3: Four is the normal sampling depth, but that's no big deal. I'll adjust your answers to match a 4" horizon. Exchange Capacity 7.5: Silty sand, probably. The soil holds a tolerable level of resources and testing every other year will be sufficient to make sure nothing's going awry once it's adjusted. pH 6.4: Right where it should be, which is because most of the resources that generate pH are right where they should be. I'll want to adjust a few of them a little bit, but will do so in a relatively pH neutral manner. Organic Matter 4.8%: Nicely in the Good range. Certainly mulch mow, mow all fall leaves, and feed organically if you want, but this is not an emergency. The EC of the soil is high enough that there's no reason to specifically work on organic matter to raise the EC. Sulfur 11: A nice answer, with plenty of margin for adding sulfate-based chemistry to adjust things. I don't need much margin. Phosphorus 77 (103 adjusted): Low, and definitely impacting lawn quality. Target here will be 200. To adjust this, we use starter fertilizer, and my recommendations are below. Calcium 64.6%: Right in optimal range, although with a lower EC soil I'd like to adjust this a tiny bit (that 50 pound [67 pound adjusted] shortage is minor, but...) For this, we use gypsum, which is available at many big box stores, landscape shops, and garden stores. Get the pelletized, it's much easier to handle, if available (and it usually is). My goal here is to nudge the calcium levels closer to 70%. Magnesium 15.4%: Perfect. No magnesium is required or desired. Potassium 5.0%: Perfect (the previous test was wrong on this, I think). No potassium is required or desired, and this is absolutely optimal. Sodium 1.0%: Perfect. Sodium does nothing for a lawn, so very low levels are desirable. The gypsum might reduce this a tiny bit and, if so, great. If not, no problem. Minor Elements: Boron is deficient. The rest are fine, although if you wish to use Milorganite (high iron), that would probably improve the lawn color a little bit over time. Boron <0.2: Deficient. We use Milorganite as a carrier and 20 Mule Team Borax as the boron source. You can purchase 20 Mules at the grocery store in the laundry section. In a wheelbarrow or the like, dump the Milo. Spraying very, very lightly with water (I use a spray bottle like the kind people use to damp their clothes when they iron) will help the boron stick. Add the recommended amount of 20 Mule Team Borax and stir, spraying occasionally to get the stuff to stick to the Milo. Then apply over the recommended area. So if going for bag rate Milorganite (1 bag per 2,500 square feet), you'd add 12.5 tablespoons of 20 Mule Team Borax. Recommendations: Seeding Time: Starter fertilizer at bag rate (you already did this). October 15: Starter fertilizer at bag rate. November 1: Apply 5 tablespoons (not a misprint) of 20 Mule Team Borax per thousand square feet. April 1, 2016: Apply 5 to 10 pounds of gypsum per thousand square feet (I'd prefer 7, actually, but anything in that range is just fine). Memorial Day 2016: Starter fertilizer at bag rate. Labor Day 2016: Starter fertilizer at bag rate....See MoreYear 2 - Soil Test Results
Comments (7)To a large extent, I'm literally going to copy and paste last year's test--this is not that much different. Things that have changed are, of course, discussed ad nauseum below. EC 34.5: This would normally be indicative of a very dense soil...except that I can see it's over-inflated by your excessive calcium. I'm actually using an EC of 15 below for adjustments, or the equivalent of a silt soil. pH 7.3: 0.3 difference downward from last year is related to the pocket of high calcium soil you hit when you tested (Ca has less influence on pH than Mg or Na). Really, this is not different from 2015. OM 3.44: This came up about 0.8%, which is a great one year change. Keep going! Sulfur 12: Normal, and no appreciable change. Phosphorus 52: This stayed low, so I repeated 2015's notes. Pretty low for your soil, where my target is 300. I've recommended starter fertilizer below, which means buy the cheapest fertilizer with a high second number (like 18-24-6 or 20-27-5 or whatever). This adjustment will probably take several years (added in 2016: Yeah, it's gonna definitely take a couple years). Calcium 90.0%: High, as reflected in the numbers. We ignore this as there's not much I can do about it, although the starter will throw away a little calcium. You have so much that I doubt this will matter. Fortunately, it's not causing problems with your lawn. Magnesium 4.8%: Still rather low, some of which is your soil being low on Mg, and some is the calcium dominating the soil profile. Let's raise this a bit. You'll need Epsom salt from your local drug store, usually in the First Aid or bath section. Although the shortage looks rather bad on the soil profile, this is an aspect of your over-inflated EC. It's not that bad. Potassium 0.9%: Again, rather low, for the same reasons and with the same considerations as magnesium. Most local garden or landscape stores will order potassium sulfate for you, or you can get it online. Recommendations below. Minor Elements: Copper came up a bit, which is a result of adding organic matter (or sampling from areas with higher OM, that sometimes happens). Boron is close enough to pass, so iron is the only note remaining. Iron 58: Rather low, particularly for your pH. This will tend to produce a paler color on the lawn. Whenever you like, apply Milorganite at bag rate to slowly--very slowly--raise this. It did come up 8 PPM this year, so that's great. Recommendations (these are actually identical to last year, which is unusual, but we're fighting with a calcium heavy soil. Changes are slow). Early May: Feed at bag rate with starter fertilizer. May 15: Apply 2 pounds of Epsom salt per thousand square feet. June 1: Feed at bag rate with starter fertilizer. June 15: Apply 3 pounds of potassium sulfate per thousand square feet. July/August: Feed normally. September 1: Feed at bag rate with starter fertilizer. September 15: Apply 2 pounds of Epsom salt per thousand square feet. October 1: Feed at bag rate with starter fertilizer. October 15: Apply 2 pounds of potassium sulfate per thousand square feet....See MoreLogan Labs soil test results.
Comments (7)Thank you Morpheuspa. I am very glad it sounds like I do not have any major issues. 1) On 9/1/16 I put down 18-24-12 starter fertilizer because I seeded but I will avoid that as you had suggested. I do/did plan however to use 28-8-16 on 10/1/16 and then 46-0-0 on 11/24/16. Is the phosphorus in 28-8-16 considered low enough to be used in my application? 2) I was wondering if you happened to look at the pictures of what happened to my lawn in this link: http://forums2.gardenweb.com/discussions/4136787/what-is-going-on-with-my-lawn. If you happened to have time to look, what do you think happened if all seems ok with soil? I recently put down 20lbs/1000sqft of cracked corn(no local cornmeal available) right after I grabbed samples of soil, just in case soil results came back negative and it was fungus. I was mowing high so I didn't realize how bad it was until I cut it down to 2" to reseed. It looks as if the lawn disintegrated. I was the grass-whisperer the first year the grass was established until it's first August/2016, and now I am the grass-destroyer. Most of the damage is in the shady areas, but some is in sunny areas as well. If I had to guess, it was either the heat or maybe I watered too much. It seems I ran into problems once I started to water an inch, but then again it could be a coincidence with the summer heat, i don't know. 3) Are there other ways to get dead grass and clippings to decompose without dethatching? I was under the impression that mulching your grass was good, but what for if it does not decompose and keeps building up and you have to remove it anyway? Dethatching just seems like a lot of work in addition to everything else with this lawn. If I have to, I have to though. What do you think? Thank you for advice....See Moremorpheuspa (6B/7A, E. PA)
8 years agocoreman73
8 years agomorpheuspa (6B/7A, E. PA)
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8 years agomorpheuspa (6B/7A, E. PA)
8 years agocoreman73
8 years agomorpheuspa (6B/7A, E. PA)
8 years agocoreman73
8 years agomorpheuspa (6B/7A, E. PA)
8 years agocoreman73
8 years agomorpheuspa (6B/7A, E. PA)
8 years agocoreman73
8 years agocoreman73
8 years agomorpheuspa (6B/7A, E. PA)
8 years agocoreman73
8 years agomorpheuspa (6B/7A, E. PA)
8 years agocoreman73
8 years agomorpheuspa (6B/7A, E. PA)
8 years agocoreman73
8 years agomorpheuspa (6B/7A, E. PA)
8 years agocoreman73
8 years agomorpheuspa (6B/7A, E. PA)
8 years ago
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