BOTANY

Detailed explanation-1: -The primary nutrients are nitrogen, phosphorus and potassium. You may be most familiar with these three nutrients because they are required in larger quantities than other nutrients. These three elements form the basis of the N-P-K label on commercial fertilizer bags.

Detailed explanation-2: -The nutrients most commonly deficient in plants are phosphorus, nitrogen, and iron. Phosphorus can be present in the soil, but in quantities too small to be taken up effectively. Nitrogen might be present, but in a form that cannot be used by plants. In alkaline soils, some plants are unable to take up iron.

Detailed explanation-3: -Nitrogen and phosphorus are among the elements considered most limiting to plant growth and productivity because they are often present in small quantities locally or are present in a form that cannot be used by the plant.

Detailed explanation-4: -The primary nutrients are nitrogen (N), phosphorus (P), and potassium (K). These major nutrients usually are lacking from the Plant Nutrients http://www.ncagr.gov/cyber/kidswrld/plant/nutrient.htm Page 2 soil first because plants use large amounts for their growth and survival.

Detailed explanation-5: -Soil is a major source of nutrients needed by plants for growth. The three main nutrients are nitrogen (N), phosphorus (P) and potassium (K). Together they make up the trio known as NPK.