The four major nutrients are carbohydrates, proteins and fats. Plus I would include minerals. All are necessary for good health.
amino acidsamino acids
Nitrogen and Phosphorus
There really isn't a MOST important part ... if you don't get the proper mix of all required nutrients you die. (Fastest if you run out of air, second fastest if you run out of water.)
Protein and fiber are the most important. There are also amino acids and such.
Nutrients important to human metabolism include the essential vitamins and minerals as well as a source of energy that is found in calories from sugar and fats.
Bacteria is the most important organism because bacteria gets the nutrients from dead plants and animals, and then it provides the nutrients for the grass to be able to grow.
As discussed, the four most important influences of Western art history are:
The most important are oxygen and carbon dioxide.
atmosphere
Yes they r all important in a food chain
the most important is the sun, the water it takes in through it's roots and nutrients through the roots. also carbon dioxcide.
Frankly, all the soil nutrients are important. Loking at where photosynthesis takes place (the leaves), the rootting and the good look of crops, i will say they are Nitrogen, Phosphorus and Potasium.