Nutrition quality depends on the essential plant nutrition you provide.
There are 16 elements known to be essential for plant growth. Carbon, Hydrogen, Oxygen are derived from water and carbon dioxide.

Phosphorus, Potassium, Sulpher, Calcium, Magnesium, Boron, Chlorine, Copper, Iron, Manganese, and Zinc are derived from the soil.

Nutritional requirements for the plants will vary from crop to crop as many factors will affect the nutritional quality of the plants. The major factors affecting the nutrient content of fruits, field crops, vegetables are soil factors, climate, management practices, variety of crops, and the post-harvest methods. So to maintain the nutrition quality of the plants, the nutritional requirements will vary from crop to crop.