Apples 6 10 14 18 Asparagus 2 4 6 8
Avocados 4 6 8 10 Beets 6 8 10 12
Bananas 8 10 12 14 Bell Peppers 4 6 8 12
Blueberries 10 14 16 20 Broccoli 6 8 10 12
Cantaloupe 8 12 14 16 Cabbage 6 8 10 12
Casaba 8 10 12 14 Carrots 4 6 12 18
Cherries 6 8 14 16 Cauliflower 4 6 8 10
Coconut 8 10 12 14 Celery 4 6 10 12
Grapes 8 12 16 20 Corn Stalks 4 8 14 20
Grapefruit 6 10 14 18 Corn (Young) 6 10 18 24
Honeydew 8 10 12 14 Cow Peas 4 6 10 12
Kumquat 4 6 8 10 Cucumbers 4 6 8 12
Lemons 4 6 8 12 Endives 4 6 8 10
Limes 4 6 10 12 English Peas 8 10 12 14
Mangos 4 6 10 14 Escarole 4 6 8 10
Oranges 6 10 16 20 Field Peas 4 6 10 12
Papayas 6 10 18 22 Green Beans 4 6 8 10
Peaches 6 10 14 18 Hot Peppers 4 6 8 10
Pears 6 10 12 14 Kohlrabi 6 8 10 12
Pineapple 12 14 20 22 Lettuce 4 6 8 10
Raisins 60 70 75 80 Onions 4 6 8 10
Raspberries 6 8 12 14 Parsley 4 6 8 10
Strawberries 6 10 14 16 Peanuts 4 6 8 10
Tomatoes 4 6 8 12 Potatoes 3 5 7 8
Watermelons 8 12 14 16 Potatoes, Sweet 6 8 10 14
Romaine 4 6 8 10
Within a given species of plant, the crop with the higher refractive index will have a higher sugar content, higher mineral content,
higher protein content and a greater specific gravity or density. This adds up to a sweeter tasting, more minerally nutritious food
with lower nitrate and water content, lower freezing point, and better storage attributes.