Fertilizers and Their

Table of Contents

Introduction -4

Essential Plant Nutrients -4

Functions of the Essential Nutrients in Plants - 6

Visual Diagnoses of Plant Nutrient Deficiencies - 8

Generalized Key to Plant-nutrient Deficiency Symptoms - 1°

Amending Soil Chemical Properties- 12

Fertilizer Materials - 12

Fertilizer Label - 12

Complete versus Incomplete Fertilizer - 13

Special-purpose Fertilizers - 14

Slow-release Fertilizers - 14

Organic Fertilizers - 15

Calculations of Application Rates- 16

Ex. 1. Calculating Nutrient Content of Dry and Liquid Fertilizers- 16

Frequency of Fertilizer and Lime Applications- 17

Timing of Fertilizer and Lime Applications - 18

Application Methods - 18

Broadcasting - 18

Banding - 18

Sidedressing- 19

Fertigation - 19

Foliar Feeding- 19

Listings of Commonly Available Fertilizer Materials-20

Nitrogen -20

Phosphorus-21

Potassium -21

Complete and Mixed -22

Secondary Nutrients and Micronutrients -23

List of Tables

Table 1. Essential plant nutrients and their elemental (chemical) symbol-5

Table 2. Average concentrations of 13 soil-derived (mineral) nutrients in plant dry matter that are sufficient for adequate growth-6

Table 3. Functions and available forms of nutrients -7

Table 4. Nitrogen fertilizer materials -20

Table 5. Phosphorus fertilizer materials -21

Table 6. Potassium fertilizer materials-21

Table 7. Some complete and mixed fertilizer materials -22

Table 8. Some secondary and micronutrient fertilizer materials -23

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