Garden Pests and Diseases: Tomato Problems, 1 by Kelli

Kelli wrote:
In this photo you'll see four tomato plants. The green stakes mark the plants. (The tallest thing is pole beans.) From front to back they are two "Champion", a Brandywine", and a "Purple Calabash". The Brandywine and Calabash are o.k. but the Champions are scrawny. I have grown Champions before and they have done all right in the past. They are not growing much and the leaves are small and have yellowish spots. I have given them epsom salts and an organic plant food (1-3-1 ?). This is the area where we usually have the garden, but I try to rotate things and the garden sat fallow all last year. I have had nematode problems in the past but the reason I planted the Champion is because they are nematode resistant. What do you think is wrong with these plants?