A nice attempt but you'll have to dig deeper to understand how it works.
First off this is how phosphate contaminates waterways.
Phosphorus gets into water in both urban and agricultural settings. Phosphorus tends to attach to soil particles and, thus, moves into surface-water bodies from runoff.
The soil particles holds the phosphorus in the top few inches of the profile. Then during saturation events, it dissolves runs off with the water.
It also can leach into groundwater but it's not as common and depends on the chemical makeup of the soil type.
https://www.usgs.gov/special-topics/water-science-school/science/phosphorus-and-water#overview
This is why phosphorus in lawn fertilizer has been banned in many states.
1/3 of phosphorus is not available to plants at application - completely missed that one.
Plants only take up the ortho-phosphate. Water soluable phosphate is usually a blend of polyphosphate (2/3rd) and ortho-phosphate (1/3). Polyphosphate is converted to ortho-phosphate via hydrolysis in water. Depending on the composition of the soil temperatere, moisture, it can take a few days or a few weeks or months to convert.
K+ interfering with the uptake of Mg+ and Ca+.
K+ , Mg+ and Ca+ compete for uptake directly with K+. Any amount of excess K+ directly competes with the uptake of Mg+ and Ca+. This is why some species just uptake extra K+ and store it in their vacuoles. If you want to cause BER in tomatoes/peppers, watermelons etc... extra K can do this the first year. These species struggle to get enough Ca to the growing point under good conditions. Anything that slows it down can cause BER.
I used to spend several thousand every year buying books. Usually from small independent bookstore. I was also always in the library checking out books but the local libraries collection was very small and limited.
Next I got one of the early generation kindles keyboard when I was traveling all the time before I had a smart phone. I of course found all the free books and downloaded several thousand of those. Amazon made almost nothing off of me for that one. I still hit the library regularly for books I could not get for free or stuff for my kids.
Then my local library started offering digital books via Libby and Hoopla. I have pretty much completely stopped using kindle completely in favor of those two apps. I vote every chance I get for the library to get more funding as its back to being my go-to place. I physically have only gone to the library once in the past 5 years however.
Honestly, I would rather see a massive extension of library services than more private bookstores.