Hello fellows gardeners,
I have a problem and I apply for your assistance. My soil was tested in laboratory and brought 4.4pH result. Same time its filled with a good amount of organic matter and the only deficiency is has is a phosphorus.
Same time I learned regardless of how good your other soil test result readings are your plants have no ability to absorb them from an acidic soil.
Therefore, to raise pH is an assignment No.1 for me.
My goal is to get it at least 6.0 which is neutral. Would appreciate for any PRACTICAL ( coming from experience) suggestions to understand HOW MUCH Lime stone and what grade of that stone I have to apply over my grapes. I mean how many lbs per a plant I have to apply on roots and for how many years its gonna work to reach at least 12 inches deepness.
The reason for asking is to estimate my life longevity vs. soil quality improvement.
To determine how much to apply you need not only the pH but the cation exchange capacity, CEC, of your soil. From that information a recommendation on rate can be made.
I’d suggest another soil test to 12 inch depth along with a CEC test. Have that done at a place that will then give a rate requirement for grapes. Most labs give application recommendations.
A pH of 7 is neutral. 6 is slightly acidic and probably a good target for grape soil.
If your current soil test results also have CEC data, you should be able to find an online site that will give an application rate estimate. Even without CEC, a rate estimate for average soil could be made.
Every place I’ve had do soil testing gives recommendations on lime per acre as well as NPK per acre.
You need to follow the lab results for soil testing and follow their recommendations based on your soil type and actual findings of what your needs. I am one to use a state’s extension service for recommendations based on your results. If you put out too much at one time, it will lead to magnesium and/or calcium toxicity. A ton per acre per year is the most I would put out on my soil type and retest and repeat as needed to slowly bring up the ph. But follow your soil test with advice from your state fruit specialist if you want the best advice. I haven’t come across any University specialist who wouldn’t mind helping a hobby grower.
Thank you. Same time my question was about how to find that link where I can see the application ratio for lime stone. As well I try to understand the lime stone grading . What those 55-60 or 60-75 digits means for the application reasons?
That is the problem : “per acre” . I grow grapes, I can distribute it directly under each plant. I don’t want to spread it around because my grape yard is on a hill. My grapes grow on “steps” .