Here is a Brix Chart, which gives growers a guide on their produce and its quality, it is based on LaMotte growing and testing (Originates from focus on Grapes, for Wine, I think, but expanded by Reams to include many Fruits and Vegetables :
(From Michigan Farm Fresh Produce)
What this doesn’t show is the “Fuzzy Line” aspect, which denotes TDS which should ideally be high (think of Water, that should be low, as that is to go to the the Kidneys chiefly to help wash us out, in plants it is the reverse as we are designed to uptake minerals/vitamins/traces from matter not fluid).
Anyway, that’s hopefully interesting to the odd reader, would be epic if the Vegetable growing area Tottenham set up these past couple of years, is using Biological Farming (Brix methodology), so our players can be sure to be eating nutrient dense, fully ripened at Harvest foods!
Any DIY growers, would highly recommend getting a refractometer and testing your produce, have done UK Supermarkets for a few things, and it is not good, mostly poor, sadly.