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Chapter 5: Fertilizer – A Source of Plant Nutrients Fertilizer = Any material containing one or more of the essential nutrient that is added to the soil.

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Presentation on theme: "Chapter 5: Fertilizer – A Source of Plant Nutrients Fertilizer = Any material containing one or more of the essential nutrient that is added to the soil."— Presentation transcript:

1 Chapter 5: Fertilizer – A Source of Plant Nutrients Fertilizer = Any material containing one or more of the essential nutrient that is added to the soil or to plant foilage for the purpose of supplementing the plant nutrient supply.

2 Types of Fertilizer Simple Nutrient – Containing only a single nutrient. Multi-Nutrient – Referred to as mixed or complex fertilizers. (can be blended or homogeneous)

3 Anhydrous Ammonia NH Is combined with hydrogen Very energy intensive Ammonia is absorbed readily Injected in soil

4 Aqua Ammonia NH 4 OH Dissolved in water Vapor pressure is low so can apply it with lower cost equipment Injected in soil or water

5 Ammonia Nitrate NH 4 NO Reacting nitric acid with anhydrous ammonia Prilled granulated or coated Applied by broadcast or drill

6 Ammonia Nitrate - Lime Contains Calcium Carbonate (40% limestone) Same ways to apply as Ammonia Nitrate

7 Ammonium Sulfate (NH 4 )2SO S Contains 24% sulfur Made by reacting anhydrous ammonia with sulfuric acid Apply by drill or broadcast

8 Calcium Nitrate 5Ca(NO 3 ) 2 +NH 4 NO Ca Product of Nitric phosphate+phosphate ore and ammonia Final product is white granular product

9 Nitrogen Solutions Dry mixes in solution are used to enhance nitrogen availability AN-20 Ammonia Nitrate UAN-32 urea ammonium nitrate CAN-17 Calcium nitrate ammonium nitrate Salting out

10 Urea CO(NH 2 ) Highest percent N of all dry fertilizers CO 2 bubbled in Ammonia (pressure and temperatures) Highly water soluble Used in bulk blends

11 Nitrogen Solutions Pressure or non pressure – Pressure solutions have more free ammonia than the solution can absorb, thus it must be contained in vessel. AN-20, UAN-32,and CAN 17

12 Single Superphosphate Ca(H 2 PO 4 ) 2. H CaSO 4. 2H Produced by reacting sulfuric acid with finely ground phosphate rock. Highly insoluble

13 Triple Superphosphate Ca(H 2 PO 4 ) 2. H Produced by reacting phosphoric acid with finely ground phosphate rock.

14 Ammonium Phosphate Monoammonium phosphate (MAP) Diammonium Phosphate (DAP) Ammonium Phosphate Sulfate (S) Tech – higher grades of MAP & DAP, and Liquid forms – , , , &

15 Potassium Chloride KCL Known as Muriate of potash (MOP) Least expensive so most commonly used.

16 Potassium Sulfate K 2 SO Sulfate of Potash (SOP) Used in crops that are subject to chloride toxicity or where K & S are deficient.

17 Mono Potassium Phosphate KH 2 PO MKP Useful dry or liquid

18 Potassium Magnesium Sulfate K 2 SO 4. 2MgSO Mg- 22S Does not contain chloride

19 Potassium Nitrate KNO Water soluble fertilizer for injection in irrigation systems & foliar sprays.

20 Organic Fertilizers Types?

21 Controlled Released Fertilizers Why?


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