Heat oil in large heavy non-reactive pot over medium-high heat. Cook the ground turkey until cooked through, then remove fom heat. Add onions and carrots; saute until onions are golden brown, about 10 minutes. Add garlic and stir 1 minute. Mix in cumin and curry powder and stir briefly. Add 12 cups broth and barley and Dahl. Bring to boil. Reduce heat; partially cover and simmer 25 minutes. Stir in tomatoes & juice. Simmer until barley and Dahl are tender, about 30 more minutes. Be ready to thin with more chicken broth if it gets too thick. When done, add chard and simmer about 5 minutes. Season to taste with salt and pepper.