The Elements Required in Amounts Above 0

Question

The elements required in amounts above 0.5 percent of a plant's dry weight are known as:  
A) Micronutrients
B) Macronutrients
C) Nutrients
D) Chlorines
E) Iron

Accepted Answer

Macronutrients are the elements required in larger amounts by plants, usually above 0.5 percent of the plant's dry weight. These include nitrogen, phosphorus, potassium, calcium, magnesium, and sulfur. Micronutrients, on the other hand, are required in smaller amounts, typically less than 0.5 percent, and include elements such as iron, zinc, copper, and manganese. Chlorine and iron are specific elements and not interchangeable with the broader categories of macronutrients or micronutrients.