Leaves of tomato plants turning yellow.?

I planted 8 goliath hybrid tomato plants in my backyard.Mine is a clayey soil...I mixed compost and fertiliser before planting and I am watering the plants regularly but my plants look dull and leaves are turning yellow. But they still have new green leaves and are budding. I water everday...am i overwatering? They are getting enough sunlight and I planted 80% of the plant as per the instructions and I am adding natural compost (chopped up veggies) to it often...what might be the problem? please help!!

Leaves of tomato plants turning yellow.?
you are watering too much and this is causing fungus to build up at the base of the plant, this is called early blight, only water the plants deeply once per week (about an inch). You need to starve them a little to make the roots take hold well. And also, stop mulching and fertilizing, too much nitrogen will cause blossom drop. To fix your blight problem, mix up some horticulture oil and small amount of baking soda in a gallon of water and spray the plants every 10 days. Remove all of the yellow leaves that are already there or it will spread.
Reply:you are over watering the plants and check to make sure that you are not using to much fertilizer.
Reply:Too much water friend.