yellow leaves on the bottom of tomato plants?

[frdnicholas]

Some of the tomato plants have yellow leaves on the bottom. This is even with trimming the stalk at least a foot from the bottom. I've read that it could be a need for magnesium or uneven watering. Is this potentially damaging to the plant/fruit? We've had a ton of rain lately.

 

[Chuck]

Some of the tomato plants have yellow leaves on the bottom. This is even with trimming the stalk at least a foot from the bottom. I've read that it could be a need for magnesium or uneven watering. Is this potentially damaging to the plant/fruit? We've had a ton of rain lately.

If you can take a picture of the yellow leaves it would help diagnose.

 

[headfullofbees]

Remove these leaves; in any case they are no use to you or the plant.
That it is only leaves on the bottom, & that they are yellow rather than speckled grey, suggests that they are just old leaves and not a problem, however, as Chuck says, a photo would help to make sure.
How far are you into your season?