Luster Leaf 1605 Digital Soil Test Kit for pH, N, P and K, 1
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- Reads test colors utilizing advanced LED digital technology
- Just push test button to get results in a few seconds
- Includes pH preferences for over 450 plants and how to adjust soil pH
- Booklet has fertilizer guidelines based on nitrogen, phosphorus and potash test results.
- Performs 25 tests: 10 for pH and 5 each for Nitrogen, Phosphorus and Potash
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From the manufacturer
Luster Leaf Products, Inc. maintains it's manufacturing and warehousing facilities in Woodstock, Illinois, the company’s headquarters.
In an effort to provide products for successful gardening, Luster Leaf continues to grow and change, offering a diverse group of products for indoor and outdoor gardening. Luster Leaf offers seed sowing aids, plant identification labels and ties, soil meters, soil testers and mosses, and continues with a profuse selection of plant supports and garden décor.
Whether looking for a solution for drooping dahlias, or just fed-up with poor results in the flower bed, Luster Leaf’s product selection can help.
Compare with similar items
Electronic version of Luster Leaf’s popular 1601 Soil Test Kit. The rapitest Digital Soil Tester utilizes advanced LED digital technology and patent-pending optical calibration system to read test colors. The system is calibrated to read small color variations that can be difficult to distinguish with the human eye. The tester is easy to use. Just follow the easy instructions for each soil pH, nitrogen, phosphorus or potash tests; slide the test tube in optical chamber and push the appropriate button to get the test results. Once you have your soil test results, the tester booklet tells you how to adjust soil pH and provides recommendations for fertilizers. The booklet’s pH preference list allows you to select plants for your soil’s pH or know how much to adjust the soil pH for your current plants.
Phosphorus runoff poses a threat to water quality. Some states restrict the application of phosphorus-containing fertilizer on non-agricultural lawn or turf. Check your local laws prior to purchase.
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Just to give you some background on me and why I can support that claim- I am an Environmental scientist and hopefully soon to be Professional Soil Scientist (once I pass some exams). So this is why I say it’s pretty accurate. I tested my yard and flower beds. Because of my profession, I have access to a soil probe. I took multiple samples across the yard between 6-12” deep and submitted that as 1 composite sample and did the same for my flower beds. I submitted these samples to the Texas A&M Agrilife Extension (i’m In Houston, Tx) and I just got results back. (They are very affordable and will even consult with you about results)
First, let me tell you what this test kit told me.
It told me my Nitrogen (N) and Phosphorous (P) is depleted, I maxed out on the Potassium (K) and my pH was at maximum of at least 7.5.
My actual soil results confirmed I have 0 ppm Nitrate-N, very little P at 5 ppm, K reported at 108 ppm but does not exceed the “high” or Critical Level and my pH is at 8.0.
I would say that considering how cheap this kit is, it was pretty accurate certainly gave me enough information to steer me in the right direction.
Now I just need to apply my hard earned knowledge in Soil Fertility to real life, instead of just theory. =) I hope this information helped someone feel More confident in using this kit.
*Update- I passed one of my exams and am now a Certified Professional Soil Scientist. Had to brag on myself I’m so excited, yay me!
So I bought myself this test.
Took some dirt from the ground.
Swirled it all around
To find that
Nitrogen was what I lacking
Which, of course, sent me packing
To my home improvement store
I bought some blood meal
(It was on sale, what a deal!)
atop my soil
Nothing for days
Blood starts to boil
Then suddenly, my plants start to grow
Basil, tomato, zucchini, and carrot
So I highly recommend
You won't regret it
So I done another test, only adding a few drops of lemon juice to the pH test chamber, and a solution of uria (48-0-0) to the N test chamber instead of soil water, and after some good shaking, the pH was yellow and the N was purpule, I have attached a picture and you can see for yourself.
When this test kit tells you the pH is neutral it really is, and when it tells you have no nitrogen you really don't, and you better be spraying a whole lot of it till you get it to "adequate" level.
Top international reviews
Instructions provided with this test kit are very detailed and require pretty thorough preparation that might take a full day (ie it's not quick). You have to be very precise with quantities and the soil has to be prepared properly for testing as well as during testing itself. A single missed instruction may compromise your test results (like ensuring that pH test has time to settle but nutrient tests are shaken up with flakes suspended in liquid). Emptying little capsules of test powder require real finesse as well. Precision is the name of the game here, and it's significantly harder than using a test strip or a pH meter with two metal probes.
Now, I actually enjoyed chemistry experiments in school and have a very detail-oriented mind. I found this process interesting but quite cumbersome. It also comes with 5 capsules for each nutrient (and 10 for pH) and refills aren't easy to find. The digital aspect of this test is also a bit of a joke. There is a while LED in the tester with a sensor on the other side. Readings are pretty stable from test to test, but maximum PH this reader measures is 7.5 and you have no idea if you're at 7.3 or much higher than 7.5. My digital tester with two metal probes measured between 7.2 and 7.8 around different points of the yard, but the tester just showed a 7.5 reading.
All-in-all this is both too gimmicky and cumbersome for my taste. It does seem to work, but I haven't compared test results to a real lab. That's why I rated it "just Okay". I think your money would be better spent on the test strip test like Rapitest 1601 instead of this one though.