I would say a goodly amount of organic matter, and a proper pH range. With both of those taken care of, the soil will grow virtually anything you plant in it at least halfway decently.
the most basic thing is ................DO YOUR HOMEWORK
The topsoil layer contains the most fertile soil. It is the upper layer of soil that is rich in organic matter, nutrients, and microorganisms, making it ideal for plant growth.
Thick soils typically form most readily on flat or gently sloping landscapes where weathering and deposition can occur over long periods of time without significant erosion. This allows for the accumulation of organic matter and minerals, creating a fertile and productive soil profile.
River valleys tend to have the most fertile soil due to the regular deposit of nutrient-rich sediment from flooding. This process creates a nutrient-dense layer of topsoil that is highly conducive to agriculture.
The most fertile soil is typically found in regions with a combination of factors, such as a temperate climate, abundant rainfall, and well-draining soil. Areas like the Midwest in the United States, the Nile Delta in Egypt, and the Ganges River plains in India are known for their highly fertile soil due to these favorable conditions.
more necessary, most necessary
The adjective form of necessity is necessary.
Most fertile is the superlative for fertile.
more fertile, most fertile
Orientals are the least sexually active and least fertile. Blacks the most sexually active and most fertile. Whites are intermediate.
The most important factor of making Mesopotamia's farmland fertile was water.
in cannda
Necessary is not an adverb: it is most commonly used as an adjective.
During "that time" of the month thats when she is most fertile
The most fertile soil is found around the Nile delta.
State of Punjab in India has the most fertile land in South Asia.
Most deserts have fertile soil but need irrigation to grow plants.