What organisms are found in a single gram of soil?
A single gram of soil contains billions of organisms, mostly microbial and largely unexplored. This living component makes up 70 percent of the biomass in a typical acre of earth.
Questions about Soil
Short answers, pulled from the story.
Who first described the five key elements of soil formation around 1880?
Russian scientist Vasily Dokuchaev first described this interplay around 1880. He identified five key elements: climate, relief, organisms, parent material, and time.
How does pH level affect nutrient availability for plants in soil?
A pH value of 3.5 contains one million times more hydronium ions than a solution at pH 9.5. This acidity level can make toxic amounts of aluminum and manganese available to plants.
When did wind erosion ruin American and Canadian prairies during the 1930s?
Wind erosion ruined American and Canadian prairies during the 1930s when farmers converted shortgrass prairie into crops. Immigrant settlers encouraged by federal governments plowed under native grasses without adequate protection.
What percentage of all food consumed by humans globally is produced by soil?
Soil produces 98.8 percent of all food consumed by humans globally. Agricultural practices determine which plant species can grow in specific regions.