Today we noticed a phosphorus deficiency in some of our seedlings. A phosphate deficiency manifests itself in a tomato with the underside of the leaf being a purple color and the top side of the leaf being the normal green. Here is an example.
The underside of each leaf in these seedlings were all showing the same symptoms
Our green beans were beginning to turn yellow, meaning we have a nutritional deficiency. Referring to the MGC book on page 147, I see that a general yellowing of the entire plant is a nitrogen deficiency. The book calls for a correction of 1/2 ounce per linear foot of nitrogen to be added.
Urea is available locally, 46-0-0, so we will use it.