The phosphoric acid encourages early and heavy blooming. V means Verticillum Wilt resistant, F means Fusarium Wilt resistant, N means Nematode resistant, T means Tobacco Mosaic resistant. These are all newer varieties with good flavor and production. Remember, never plant into dry soil. Be sure to water the soil before planting.
Tomatos like to be planted deep.
Plant them with just a few inches sticking above the ground, even if quite tall. Tomatos root all along the stem. Remember this is just for tomatos. Care and Training Tomatos have a deep root system and need deep watering. Sprinking isn't enough.