OBJECTIVE FORESTRY

Detailed explanation-1: -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. Other important nutrients are calcium, magnesium and sulfur.

Detailed explanation-2: -Nutrients get into the soil many different ways: from decomposed animal waste and dead plants, the atmosphere, weathering of rocks and bacteria conversions. When soils are used to grow foods, the soils need to be kept healthy, as a lot of nutrients are taken up by plants and not replaced.

Detailed explanation-3: -Nutrients in the soil are taken up by the plant through its roots, and in particular its root hairs. To be taken up by a plant, a nutrient element must be located near the root surface; however, the supply of nutrients in contact with the root is rapidly depleted within a distance of ca.

Detailed explanation-4: -Mineral nutrients come from the soil. These nutrients are absorbed by the plants roots when uptaking water. Mineral nutrients are broken up into macronutrients and micronutrients. The most important primary macronutrients for plants are nitrogen (N), phosphorus (P), and potassium (K).

Detailed explanation-5: -The nutrients supplied to plants by soil are nitrogen, phosphorus, potassium, calcium, iron, zinc, manganese, magnesium, sulfur, copper, molybdenum, boron, and chlorine.