Organic food is
synthesised in
Answers
Leaves synthesize food for the plant by using the energy in the sun to power the splitting and reassembling of molecules of carbon dioxide (CO2) and water (H2O) into glucose - also called sugar - (C6H12O6) and oxygen (O2). This process is called photosynthesis. (Photosynthesis - Wikipedia)
This glucose (sugar) is the food that all the plant cells use to power growth and any other activities that they do and it’s a basic building block of most plant compounds. (And incidentally, since animals eat plants, it also powers the all the activities of animals.)
Since the glucose is produced 100% by the plant, it is, according to definition, organic. ( of, related to, or derived from living organisms. Definition of ORGANIC)
The glucose is transported from the leaves to the rest of the plant by the system of tubes called the phloem, sort of like the arteries in an animal body. Phloem - Wikipedia
However, the way you’ve phrased your question makes me wonder if you are actually asking something about organic fertilizer, since no one ever thinks of the food produced by the plant itself as organic (although of course it is.) So I’ll toss out a few other concepts that may be of interest to you.
Fertilizer, either organic or chemical, isn’t plant food. I know, that’s how people refer to it, but strictly speaking, it isn’t the plant’s food. The food is the glucose, which the plant makes itself. Fertilizer is a mixture of minerals - nitrogen, phosphorous, potassium, calcium, magnesium, sulfur, iron, copper, and several others. Mineral elements required in plant nutrition
Minerals are used by the plant in making many things - photosynthetic pigments, compounds used in metabolism, auxins, hormones, proteins, vitamins, and the like - but they are used in relatively small amounts. For instance, the simple formula for one molecule of the most common type of chlorophyll is carbon (55 atoms,) hydrogen (72 atoms,) oxygen (5 atoms,) nitrogen (4 atoms,) magnesium (1 atom.)
Imagine that the basic glucose is like the lumber use to build a house - then the minerals are more like the nails and the saw that shapes the wood.
Most of the minerals that plants use are absorbed through the roots, and transported throughout the plant in the tubes called xylem, to the different areas where they are needed.
The minerals occur naturally in the soil - from sand, clay, and volcanic action - and from the byproducts of the decomposition of organic matter. Certain kinds of growing practices can lead to the naturally occurring minerals being used up, at which point the minerals need to be replaced. One common way to do this is by fertilizing.
Organic fertilizer is made from animal and plant waste that has been decomposed by microbes, and is preferred by many people because it improves the condition of the soil as well as providing the required minerals.
Chemical fertilizers are made from rocks mined from the earth, or from byproducts of chemical plants. They provide higher concentrations of minerals, than organic fertilizer do, and are usually much cheaper.
Organic fertilizer and chemical fertilizer ultimately provide the same minerals. Minerals need to be in the form of dissolved mineral salts to be absorbed by the roots. The minerals in organic fertilizers are still bound up in the organic materials, and require the action of various microbes to break them down into forms usable by the plant. The chemical fertilizers are already in the mineral salt form, so they are available to the plant roots much more quickly, although since they’re stronger than organic fertilizers, it’s easier to use too much which can have many negative effects on the soil, the plants, and the environment in general.