Logan Lab Test Results
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Need help with Logan Lab test results
Comments (2)The Total Exchange Capacity (M. E.) is another way of expressing the Cation Exchange Capacity or the ability of a soil to transfer nutrients, moisture, etc. Perhaps this link will help explain that for you. http://soilminerals.com/Cation_Exchange_Simplified.htm Soil organic matter is a bit low. While 5 percent is not bad many of us organic growers prefer something in the 6 to 8 percent range. Calcium is a bit low and Magnesium is a bit high and that means the Calcium to Magnesium ratio is out of kilter. Phosphorus is about where it should be (25 to 85 ppm, divide pounds per acre by 2 to get ppm) while Potassium is a bit low. If Logan Labs does not provide recommendations to correct any deficiencies perhaps your county horticulturist at the Purdue Cooperative Extension Office may. It is too bad that Purdue no longer does soil testing. I have heard that the University of Kentucky would soil test for people in Indiana. kimmq is kimmsr...See MoreLogan Labs Soil Test Results & Recommendations Help
Comments (1)I really don't like their recommendations for a number of reasons. One, sulfur doesn't work. Surface applied, you'll lose three quarters to outgassing to the atmosphere as sulfur dioxide (smog), so thanks for the air pollution. :-) They also recommend some rather difficult or expensive sources (11-52-0, for example). I have monoammonium phosphate on hand. You almost certainly don't. And so on. The zinc and copper aren't necessary, both levels are perfectly reasonable in your soil. In the below, I've assumed you have a northern lawn. If that's incorrect, this will still work, but southern lawns would benefit from a slightly different schedule. ME 22.9: This is a little overinflated by your excess calcium, which results in an ME that's somewhat high. I'm using a standard of 15 for soil applications as it's safe to do so. pH 7.6: Kind of high, but get used to it. There's not terribly much you can do about it (as mentioned, surface applied sulfur does not work very well). Fortunately, lawns are extremely tolerant of a pH in this range, although color will suffer a bit. OM 5.5%: In the Good range, so no specific work needs to be done here. Sulfur 13: Well within normal range. Phosphorus 147: While a bit low, it's nothing extreme and unlikely to be causing much in the way of visible problems. Still, with your pH, I'd really prefer this to be in the 260 range (higher pH levels inhibit phosphorus release). We use good old-fashioned starter fertilizer to do this--just get the cheapest as they all work the same. Recommendations below. Calcium 80.8%: High, but not a problem, and almost impossible to dispel. Certainly avoid any calcium sources. Magnesium 12.9%: On paper, a tad low. In reality, it's just fine--your very high Ca levels are masking some of the Mg in your soil. Your plants have no trouble getting all the magnesium they need, and then some. Don't add more. Potassium 1.8%: This is short on paper, and looks shorter in the soil than it really is. It should be enhanced, but not quite to the levels their recommendations listed. We use potassium sulfate (sulfate of potash) for this, which some garden stores and landscape places carry--or they'll order it for you. Recommendations below. Minor Elements: Fine, but I do mention iron and boron below. Iron 110: Just fine and not a problem, but it won't produce the best color at a pH of 7.6. Whenever you like, you can apply Milorganite at the bag rate to very slowly raise this. Boron 0.55: A tad low. This won't be an issue, but I would like to correct it. 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 7.5 tablespoons of 20 Mule Team Borax. Recommendations: May 10: Apply 3 pounds of potassium sulfate per thousand square feet. Memorial Day: Feed the lawn with starter fertilizer at the bag rate. June 15: Apply 3 tablespoons per thousand square feet (not a misprint!) of 20 Mule Team Borax. Labor Day: Feed the lawn with starter fertilizer at the bag rate. October 1: Feed the lawn with starter fertilizer at the bag rate. October 15: Apply 2 pounds of potassium sulfate per thousand square feet....See MoreLogan Labs Soil Test Results advice - high phos., low nutrients
Comments (12)Given the consistency between tests, I don't see too much chance that all four are off, no. Let's begin at the beginning. All recommendations are for everything except the holly, which actually likes soil like this (there are plenty of plants that actually prefer poor soils). For the most part, I won't quote the holly bed in the stuff below. Big point: stop using the compost. It's probably got way too much phosphorus in it. Standard depth of soil testing is 4 inches, so some numbers aren't quite as bad as they look. I'll adjust recommendations accordingly. ME 10-13: Sand with silt, and a nice place to be. Once we stabilize this--in a few years as it's really far off--you can probably test every 2 or 3 years and be fine. pH 4.8 - 5.5: Very low, but not the lowest I've ever seen by a long shot. My own initial test was below 4.8--4.3 if memory serves. We'll fix this under calcium, magnesium, and potassium below. OM 5-12%: Good to extraordinary, and you don't need any more at this time. While I wouldn't mind seeing the Right Bed area come up to match the others, I don't want it badly enough to add more phosphorus! Sulfur 13-15: Completely normal numbers and entirely appropriate. Phosphorus 1282-2187: You don't quite take the crown for highest phosphorus I've ever seen (that was over 2,400), but it's close. Avoid any and all phosphorus sources (hence the recommendation to avoid the compost). Soybean meal is OK as it only contains 1% P versus 6.25% N. However, even with organics, never use anything that's above a 1:4 P:N ratio. That pretty much means soybean meal. Calcium 37-54%: The Right Bed is actually not awful, while everything else needs a serious boost. In this case, with your low pH, I don't recommend dolomitic limestone--use a good calcitic like Encap, Mag-I-Cal, or Pennington Fast Lime. But don't throw out the dolomite, I want you to use that as well to raise the magnesium levels at the same time (just very slowly). Magnesium 4.3-7.1: Low to low-ish. 30 lb/K of dolomitic this year will very slowly work to raise this. It's not an emergency, most plants do OK at 4%, they just prefer around 10 in a soil of your EC. Potassium 1.0-1.5%: Quite low, the floor value would be around 2.5%. I'm actually a fan of being in the 4-5% range. We use potassium sulfate (sulfate of potash) to fix this, which you can get from some garden or landscape stores, or they'll order it for you. Minor Elements: I wouldn't mind fiddling with boron, but you have so many other issues that I don't wish to do that--and I'm not completely sure what will release from the organic matter in your soil. So hands off that for this year. Iron is great, none is needed. Copper 36-60 PPM: These are through the roof...and there's not much we can do about it. Some types of organic matter (manure compost, I'm looking at you, here) will contain large amounts of some elements. Apparently yours had excessive copper. I have to do some research to be sure, but this shouldn't be much of a problem...I hope...however, avoid any copper source, no matter how small. Zinc is also quite high, but that's not a problem. Aluminum is extremely high, but raising your pH will overcome any possible problems from that. It's not an issue unless pH is below 5, and not a severe issue until under 4.5. Recommendations: Now: Apply 9 pounds per thousand square feet Encap, Mag-I-Cal, or Pennington Fast Lime. Apply 15 pounds per thousand dolomitic limestone. June 1: Apply 3 pounds per thousand square feet potassium sulfate. September 15: Apply 3 pounds per thousand square feet potassium sulfate. October 15: Apply 9 pounds per thousand square feet Encap, Mag-I-Cal, or Pennington Fast Lime to everything except the Right Bed--apply 3 pounds per thousand there. Apply 15 pounds per thousand dolomitic limestone everywhere....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 More- 8 years ago
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