The importance of this test is to avoid problems with bugs, disease, and to assure that you are growing food that will benefit your health. Below are a couple charts that show the relative Brix that can be expected.
... Low-Brix plants can’t develop the strong extraction fluids to pull minerals from the soil. As a plant matures, it requires more and more soil energy to extract nutrients from the soil. Reams continually stressed the fact that while a baby seedling had minimal daily nutrient needs from the soil, a mature plant drawing down heavily was an entirely different story. He taught that for a plant to bear a full crop of high quality produce it must have adequate soil energy (called "ERGS" or Energy Released per Gram per Second) available to "set" the high-quality crop and then "bring it home." ERGS is merely a measurement of the ionic conductivity of the soil expressed as microSiemens and directly measured with an ordinary conductivity meter. The point is that only healthy soils with teeming bacterial life and full mineral availability can "keep up" when the plant roots are most demanding. - Nutrient Dense Food High Brix Farming-Gardening
“In essence, I discovered that there was a direct correlation between the hydrogen content in the cell and plant health. At the ideal of 6.4, the hydrogen content of plant fluids is approximately
12%.”...“I don’t care what crop you check, 6.4 is the key factor. If it’s not there, you have an imbalance and potential problems. You can tell what the im balance is by backing up with brix levels.” - GSait Plant Health Energy Managment PDF
Ideal sap pH-level for optimal plant growth and production is pH 6.4
If sap pH exceeds 6.4, this probably means a shortage of the anions nitrogen, phosphate or sulfur. At pH 8 the odds of insect trouble is 100%.
Conversely, if sap pH is lower than 6.4, then there is a cation problem, with possible deficiencies of calcium, magnesium, potassium and/or sodium. Low sap pH suggests a far greater potential for foliar disease. At pH 4.5 the probability for fungal appearance is 100%. - Principals to Produce Nutrient Dense Crops PDF -Bruce Tainio
|Temperature, 68 °F (20 °C)|
|Specific Gravity||Brix||Specific Gravity||Brix||Specific Gravity||Brix|
On July 12th Justin and I tested some tomatoes. The cherry tomatoes are probably all the same variety but the beefsteak tomatoes are different varieties. I know that's not real scientific, but it's how my garden was planted. The hugelkulture bed is has not had time to mature so basically it is 8" of compost over dirt and wood.
|Beefsteak tomato||Wicking Bed||1.026||6.57|
|Cherry tomato||Wicking Bed||1.043||10.7|
|Medium tomato||Wicking Bed||1.022||5.57|
|Round Roma tomato||Justin's dirt garden||1.035||8.77|
|Yellow pear tomato||Justin's dirt garden||1.058||14.26|
|Brandy Wine tomato||Justin's dirt garden||1.040||9.98|
|Mortgage Lifter||Justin's dirt garden||1.038||9.5|
|Long Roma tomato||Justin's dirt garden||1.030||7.55|
|Cucumber||Justin's dirt garden||1.035||8.77|
|Yard Bean||Justin's dirt garden||1.035||8.77|
Justin and I discussed the differences in our gardens. The Brix levels of our vegetables are not that much different. But I would say his garden is producing more vegetables than mine, and he estimates this year's garden is about 4 times as productive as last years garden. It truly is a great garden.
It's anecdotal but we came to a conclusion that it is probably the amount of Azomite we each added. Justin was far more generous with the micro-nutrients. Justin has also added some organic fertilizers whereas I have only sprayed with compost tea.
But the bottom line is we both have above average brix, and no pests which I attribute to an abundance of micro-nutrients.. My soil is 80% compost and 20% worm casting. Justin's soil is a fine loam which has seen many years of gardening and received a healthy dose of Azomite.
My hydroponic garden is extremely healthy and productive, but it's not organic and uses petroleum based fertilizer.
I may buy some pH test paper and update the post with the sap pH levels in my test gardens.