What is the optimum nitrogen saturation in soil if one wants to grow tomatoes?
I’m not sure of the exact amount as I use rotted manure as a fertilizer for most of my plants. The thing to be careful about is not to give them too much nitrogen or else you’ll have lots of leaves but not much fruit. An easy way to maintain a good nutrient level is to use a good organic liquid fertilizer. Just mix it with water according to directions and once a week at watering time, include the diluted fertilizer in your watering routine. Tomatoes are pretty easy to grow. Have fun!