Why are the leaves of tomato plants turning ashen? I planted 8 goliath hybrid tomato plants in my backyard.Mine is...

I planted 8 goliath hybrid tomato plants in my backyard.Mine is a clayey soil...I mixed compost and fertiliser back planting and I am watering the plants regularly but my plants look dull and leaves are turning yellow. But they still enjoy new green leaves and are budding. I dampen everday...am i overwatering? They are getting enough sunlight and I planted 80% of the plant as per the instructions and I am count natural compost (chopped up veggies) to it habitually...what might be the problem? please help!!
Answers:    You can remove the lower leaves from your plants. I hope you allowed your compost to rot down capably before using it on your plants. Your watering is o.k. but try not to obtain the water on the leaves. Once fruit starts to set you necessitate to feed near a tomato fertilizer. Tomato plants usually make greatly of leaves which you can remove as the plants grow, but only below the flowers and fruit. This will backing the fruits to ripen. Good Luck hope you get lots of luscious toms.
If just the lower leaves are yellowing, they may only just be getting shaded out. That's ok. If the whole plant, you prbably own a virus, fungus or wilt problem (overwatering may have facilitate this) - maybe even nematodes (worms). Older tomato plants are susceptible to profusely of problems.