Garden Soils
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Garden Soils

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  • PRETEST How many have kept a garden? Why study gardening?
  • What is horticulture? The culture of the garden. Today the term is used for the care of vegetable gardens, flower gardens, fruit trees, shade and trees and shrubs, and lawns. I am not a horticulturist.
  • What is it? Is it dirt?
  • Divided into 3 grain sizes. OBJECTS: Sand – 6” tether ball to 10’ boulder Silt – bean to tether ball Clay – bean size and smaller Sand – gritty, loose, water penetrates quickly, holds little water Silt – smooth, good growing medium, medium water holding and penetration Clay – sticky, hard, little water penetration, holds water tight Loam – ideal growing medium 40% each sand and silt, 20% clay
  • OM very desirable. Holding soil in clumps – structure.
  • Influences water penetration & availability, root growth.
  • Profile Horizons Topsoil – A Subsoil – B Do not plow or till horizon B into horizon A.
  • Acid level Influenced by type of minerals, salts, OM Most plants prefer slightly acid – Boot Camp 7.6 & 8.0.
  • Lime influences pH. Dilution pH used if paste pH is 8.5+, to determine amount of sodium. Excess sodium very detrimental to soils. Salt estimate: affects pH, excess salts keep water from plants (like drinking sea water). Nitrate: need 100+ ppm.
  • Phosphorus: need: 52+ ppm in clay or lime soils 43+ ppm – medium soils 35+ ppm – sandy soils Potassium: need 120+ ppm Iron and zinc typically deficient in high pH soils.

Garden Soils Garden Soils Document Transcript

  • GARDENING
    • BILL TAYLOR
    • WESTON COUNTY EXTENSION OFFICE
    • UNIVERSITY OF WYOMING
    The University of Wyoming, United States Department of Agriculture, and Weston County Office cooperate.
  • HORTICULTURE
    • THE CULTURE OF THE GARDEN.
    • Vegetable gardens
    • Flower gardens
    • Fruit trees
    • Shade & ornamental trees & shrubs
    • Lawns
  • Collection of living and inanimate materials on the earth’s surface that supports plant life.
  • SOIL COMPONENTS
    • MINERAL - 45%
    • ORGANIC MATTER - 5%
    • PORE SPACE
      • Water - 25%
      • Air space - 25%
  • MINERAL PARTICLES
    • BY SIZE:
    • Sand - gritty, loose, H 2 O runs through
    • Silt - smooth, good growth, H 2 O medium hold
    • Clay - sticky, hard, holds H 2 O tightly
    • Loam - best mixture for growth
      • 40% sand & silt, 20% clay
  • ORGANIC MATTER
    • OM FIRST, OM IN THE MIDDLE, OM LAST
    • ADDS NUTRIENTS
    • HOLDS WATER
    • LOOSENS HARD SOILS
    • BINDS IN CLUMPS
    • BEST SOURCE - Compost
  • SOIL STRUCTURE: A-prismatic; B-columnar; C-angular blocky; D-subangular blocky; E-platy; F-granular
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  • Boot Camp Soil Tests
    • SAMPLE 1 – NORTH SIDE
      • Texture: Sandy Clay Loam
      • Organic Matter: 2.0%
      • Lime: Low
      • pH: 8.0
      • Salt: 0.7 dS/m
      • RECOMMENDATION:
        • 3.0 lb./1000 sq. ft. of Nitrogen (N)
  • Boot Camp Soil Tests (cont.)
    • SAMPLE 2 – SOUTH SIDE
      • Texture: Sandy Clay
      • Organic Matter: 1.8%
      • Lime: None
      • pH: 7.6
      • Salt: 0.6 dS/m
      • RECOMMENDATION
        • 3.1 lb./1000 sq. ft. of N
        • 2.9 lb./1000 sq. ft. of phosphorus (P)
        • 3.5 oz./1000 sq. ft. of zinc (Zn)