7 Chapter 7 Fertilizer White


Published on

Published in: Technology, Business
  • Be the first to comment

  • Be the first to like this

No Downloads
Total views
On SlideShare
From Embeds
Number of Embeds
Embeds 0
No embeds

No notes for slide

7 Chapter 7 Fertilizer White

  1. 1. FERTILIZERS AND GRASS CYCLING <ul><li>Three Main Points: </li></ul><ul><li>Know why, how much, and what kind of fertilizer to apply. </li></ul><ul><li>2. Fast release, high nitrogen fertilizers have the potential to cause plant problems and water pollution. </li></ul><ul><li>3. Grass cycling is an effective lawn fertilizer, and saves money and time. </li></ul>
  2. 2. Why Do We Fertilize? <ul><li>Q. Why do we fertilize? </li></ul><ul><ul><li>Replace nutrients that we’ve removed through harvest, pruning, mowing, etc. </li></ul></ul><ul><ul><li>Aid plants not naturally adapted to some soils </li></ul></ul><ul><ul><li>Push plants to meet the function that we desire </li></ul></ul><ul><li>Q. What is the function of landscaping? </li></ul><ul><ul><li>Beauty, visual satisfaction – green leaves, colorful flowers </li></ul></ul><ul><ul><li>Planting for function – turf to play on, visual screen with hedge </li></ul></ul><ul><li>Consider PLANT FUNCTION before we consider FERTILIZER . </li></ul>
  3. 3. Best for the Environment <ul><li>Clean Water </li></ul><ul><li>No Greenwaste </li></ul><ul><li>No Pesticides </li></ul>
  4. 4. Fertilizers <ul><li>Organic: </li></ul><ul><li>Synthetic: </li></ul><ul><li>Reading A Bag of Fertilizer: </li></ul><ul><ul><li>What do the three numbers on a fertilizer bag stand for? </li></ul></ul>
  5. 5. Example of Synthetic Fertilizer
  6. 6. Example of Organic Fertilizer
  7. 7. N – P - K
  8. 8. N-P-K <ul><li>Nitrogen – Phosphorus - Potassium </li></ul><ul><li>Nitrogen (N) </li></ul><ul><li>Stimulates photosynthesis, used for vegetative growth </li></ul><ul><li>Sources </li></ul><ul><li>Grass clippings and green leaves </li></ul><ul><li>Organic sources </li></ul><ul><ul><li>fish emulsion </li></ul></ul><ul><ul><li>blood, fish, cottonseed, soybean or alfalfa meals, </li></ul></ul><ul><ul><li>high nitrogen bird or bat guanos </li></ul></ul><ul><li>Synthetic fertilizers </li></ul>
  9. 9. N-P-K <ul><li>Nitrogen – Phosphorus - Potassium </li></ul><ul><li>Phosphorus (P) </li></ul><ul><li>Stimulates flower, fruit and root production. Rose fertilizers have higher levels of phosphorus. </li></ul><ul><li>Sources </li></ul><ul><li>Synthetic fertilizers </li></ul><ul><li>Organic sources </li></ul><ul><ul><li>Rock phosphates, bone meal, high P bird and bat guanos. </li></ul></ul>
  10. 10. N-P-K <ul><li>Nitrogen – Phosphorus - Potassium </li></ul><ul><li>Potassium (K) </li></ul><ul><li>Stimulates plant vigor, and disease and pest resistance </li></ul><ul><li>Sources </li></ul><ul><li>Synthetic fertilizers </li></ul><ul><li>Organic sources </li></ul><ul><ul><li>horse manures </li></ul></ul><ul><ul><li>kelp </li></ul></ul><ul><ul><li>mineral </li></ul></ul><ul><ul><li>some soils </li></ul></ul>
  11. 11. Nutrient Solubility
  12. 12. <ul><li>How do plants get nutrients in nature? </li></ul><ul><li>Slow Release (insoluble) fertilizers closer to natural system </li></ul><ul><li>Fast Acting (soluble) fertilizers for emergency use </li></ul><ul><li>Describe a situation where a plant might need a fast acting fertilizer? </li></ul>Soluble (fast acting) and insoluble (slow release) nutrients.
  13. 13. <ul><li>1. Wasted resources </li></ul><ul><ul><li>Once soluble fertilizers get wet, available all at once. </li></ul></ul><ul><li>2. Fast acting fertilizers flood roots with only a few nutrients. </li></ul><ul><li>3. High solubility fertilizers = pollution potential </li></ul><ul><ul><li>Only 30 - 50% fertilizers may reach plant </li></ul></ul><ul><li>4. Fast acting fertilizers cause pest problems </li></ul>Management Problems with High Solubility Nitrogen Fertilizers
  14. 14. Nutrient Source Advantage Disadvantage Greenwaste - Wide range of nutrients - Generated on-site: saves transport fees - No purchase costs - Compatible with existing soil micro-organism population - Low N-P-K value - May require shredding or composting, depending upon use - Slow release of nutrients Organic fertilizer - Wide range of nutrients - Benefits soil micro-organism populations - Low labor costs with infrequent app needs - High material costs Synthetic fertilizer – Slow release - Low labor costs with infrequent application needs - Narrow range of nutrients - High material costs - Potentially destructive to soil micro-organism populations Synthetic fertilizer –Fast release - Inexpensive material costs - Immediate plant response - Narrow range of nutrients - High labor costs w/ frequent apps. - Potentially destructive to soil micro-organism populations - Benefit only lasts a month - Potential to make plants more susceptible to pest problems
  15. 15. Ways To Prevent Problems From Fertilizers <ul><li>Avoid fast acting, high nitrogen fertilizers </li></ul><ul><li>Add organic matter to soil (compost, mulch). </li></ul><ul><li>Add organic supplements for plant strength and pest resistance </li></ul><ul><ul><li>Kelp </li></ul></ul><ul><ul><li>Worm castings (worm manure) </li></ul></ul><ul><ul><li>Compost Tea (a liquid fertilizer made by soaking compost and other materials) </li></ul></ul><ul><li>Adequate irrigation </li></ul><ul><li>Fertilize only as much as and when necessary </li></ul>
  16. 16. Grass Cycling <ul><li>What does grass cycling mean ? </li></ul><ul><li>Leave Clippings: </li></ul><ul><ul><li>More fertile soil </li></ul></ul><ul><ul><li>More stable soil life </li></ul></ul><ul><ul><li>Less compaction </li></ul></ul><ul><ul><li>Healthier roots </li></ul></ul><ul><ul><li>Better pest resistant </li></ul></ul><ul><li>Haul clippings: </li></ul><ul><ul><li>Must add fertilizer </li></ul></ul><ul><ul><li>Starve micro-organisms </li></ul></ul><ul><ul><li>Worse compaction </li></ul></ul><ul><ul><li>Stressed roots </li></ul></ul><ul><ul><li>More pest prone </li></ul></ul>
  17. 17. Grass Cycling Facts <ul><li>Nitrogen from clipping can be recycled in 2 to 3 days (radio isotope studies) </li></ul><ul><li>Average lawn = 300-400 lbs of clipping per 1,000 square feet per year </li></ul><ul><li>30 lbs of fertilizer with 8-4-6 analysis </li></ul><ul><li>Advantages of Grass Cycling </li></ul><ul><li>NO cost to buy: Save 35-75% of fertilizer costs </li></ul><ul><li>SAVE time: 50% less time </li></ul><ul><li>BETTER soil: Adds organic matter addition to soil </li></ul><ul><li>SAVE your back: 300 – 400 lbs clippings per lawn </li></ul>
  18. 18. Fertilizer Field Exercise <ul><li>Distance of walking stride </li></ul><ul><li>Square footage of two ‘lawns’ </li></ul><ul><li>Amount of fertilizer for each lawn </li></ul>
  19. 19. Selecting and Applying Fertilizers for Water Quality Protection
  20. 20. Review <ul><li>Three Main Points: </li></ul><ul><li>1. Fertilize to meet plant FUNCTION </li></ul><ul><li>2. Benefits of insoluble and organic fertilizers </li></ul><ul><li>3. Grass cycling saves money, time and fertilizes the lawn </li></ul><ul><li>What do we mean by PLANT FUNCTION? </li></ul><ul><li>What does nitrogen do? </li></ul><ul><li>What does phosphorus do? </li></ul><ul><li>What does potassium do? </li></ul><ul><li>Describe the links between fertilizers and pests: </li></ul><ul><li>Ways to prevent problems from fertilizers: </li></ul><ul><li>What does GRASS CYCLING mean? Why does it help you? </li></ul>
  21. 21. Homework: <ul><li>Check fertilizer bags you use. </li></ul><ul><li>Look for total analysis, total N, soluble N. </li></ul><ul><li>Use the chart to determine how much of this fertilizer to use and how often. </li></ul><ul><li>Write down this information and bring to next class. </li></ul>