First, let's take a look at the macros. Each of these are listed in grams and as usual, normalized to 200 calories for easy comparison, so we're always comparing apples to apples.
| Lentils | Barley | 
| Nutrient | lentils | barley | 
| Protein | 16g | 7g | 
| Carbohydrate | 34g | 42g | 
| Fiber | 14g | 10g | 
| Fat | 1g | 1g | 
| Monounsat. Fat | 0g | 1g | 
| Polyunsat. Fat | 0g | 1g | 
| Saturated Fat | 0g | 0g | 

Next, let's take a look at the Vitamin density. These values are shown in units of percent of recommended daily intake. And since we're showing 200 calories worth, this means anything above 10% is good.
| Nutrient | lentils | barley | 
| Choline | 14% | 0% | 
| Vitamin A | 0% | 0% | 
| Vitamin C | 4% | 0% | 
| Vitamin E | 2% | 3% | 
| Vitamin K | 4% | 2% | 
Lentils are a good source of Thiamin, Pantothenic Acid, Vitamin B6, Zinc. Lentils are a great source of Phosphorus, Iron. Barley are a good source of Thiamin, Niacin, Magnesium, Phosphorus, Iron.

And here we see the B-vitamins: B1 (Thiamin), B2 (Riboflavin), B3 (Niacin), B5 (Pantothenic Acid), B6 (Pyridoxine)
| Nutrient | lentils | barley | 
| Vitamin B1 | 30% | 37% | 
| Vitamin B2 | 12% | 15% | 
| Vitamin B3 | 16% | 22% | 
| Vitamin B5 | 22% | 3% | 
| Vitamin B6 | 28% | 16% | 
| Vitamin B12 | 0% | 0% | 
Now, lets look at mineral density. Here we have a lot of important electrolytes and minerals. Once again, units are in percent of RDI, thus for this 200 calorie serving anything above 10% would considered high.
| Nutrient | lentils | barley | 
| Sodium | 28% | 0% | 
| Potasium | 18% | 7% | 
| Calcium | 7% | 4% | 
| Magnesium | 18% | 21% | 
| Phosphorus | 54% | 26% | 
| Iron | 97% | 34% | 
| Manganese | 38% | 48% | 
| Selenium | 11% | 47% | 
| Copper | 44% | 28% | 
| Zinc | 24% | 17% |