Nwrec container workshop i 2006
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This document summarizes Jim Owen's approach to measuring and managing substrate properties for container production. Some key points include: - Engineer substrates to balance water and air content while providing or retaining nutrients. The optimal balance depends on the season, with more water in summer and more air in winter. - Measure physical properties like total porosity, air space, water holding capacity, and bulk density to characterize substrates. These properties can be affected by container size and shape. - Common substrate components include bark, peat, coir, compost, and mineral aggregates. The properties of each component and how they blend together impact the final substrate.
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Globemwee9700xp
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Owen 2 ashs 07
1. The document discusses research into developing a pine bark-based soilless substrate that improves water and nutrient retention in containerized plant production.
2. The researchers tested adding various mineral aggregates and clays as amendments to the substrate at different rates and particle sizes.
3. Their results showed that a substrate with 11% clay amendment (by volume) with particles sizes of 0.25-0.85 mm increased water and nutrient use efficiency, allowing for a 26-32% reduction in water application while maintaining plant growth.
Owen 2 ashs 07
1. The document discusses research into developing a pine bark-based soilless substrate that improves water and nutrient retention in containerized plant production.
2. The researchers tested adding various mineral aggregates and clays as amendments to the substrate at different rates and particle sizes.
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Clay amended soilless substrate: Increasing water and nutrient efficiency in ...
This document summarizes research on amending soilless substrates with clay to improve water and nutrient efficiency in container crop production. Key points include:
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Nwrec container workshop i 2006
- 1. Jim Owen, Jr. Substrate Properties: How to measure and manage them North Willamette Research and Extension Center
- 2. My Approach NUTRIENTS ENVIRONMENT IRRIGATION SUBSTRATE Container
- 3. My Approach NUTRIENTS ENVIRONMENT IRRIGATION SUBSTRATE Container
- 4. My Approach Engineer a substrate to balance water and air content while providing or retaining plant nutrients
- 5. My Approach SUBSTRATE Water : Air “ There is no one fit”
- 6. My Approach SUBSTRATE Water : Air SUMMER Water WINTER Air
- 7. Approach SUBSTRATE Water : Air SUMMER Water WINTER Air
- 8. My Approach STABILITY OVER TIME
- 15. AIR : WATER RELATIONSHIP
- 18. Water will not move from small pores (fine texture) to large pores (coarse texture) until small pores are saturated. Small pores large pores Small pores (full) large pores Water movement X
- 19. Sand over clay Water movement Oklahoma State University
- 20. Sand over clay Water movement Oklahoma State University
- 21. Clay over sand Water movement Oklahoma State University
- 22. Clay over sand Water movement Oklahoma State University
- 26. SOLIDS WATER AIR TOTAL POROSITY 1 2 3 Bilderback and Fonteno
- 27. 29% 29% 29% SOLIDS WATER AIR TOTAL POROSITY 1 2 3 Bilderback and Fonteno
- 28. 29% 29% 29% SOLIDS WATER 47% 45% 41% AIR TOTAL POROSITY 1 2 3 Bilderback and Fonteno
- 29. 29% 29% 29% SOLIDS WATER 47% 45% 41% AIR 24% 26% 30% TOTAL POROSITY 1 2 3 Bilderback and Fonteno
- 30. 29% 29% 29% SOLIDS WATER 47% 45% 41% AIR 24% 26% 30% 71% 71% 71% TOTAL POROSITY 1 2 3 Bilderback and Fonteno
- 31. Particle Size
- 32. Particle Size Capillary Water
- 34. Particle Size
- 36. Particle Size RAW Fonteno
- 37. Particle Size EAW WBC
- 40. First, I Digress! Bark Inventory Management
- 42. Bark Supply Bark Arrives Hot! Steam Haze around pile! Spores
- 46. Douglas Fir Bark Altland
- 47. Douglas Fir Bark AGED FRESH Altland
- 48. Douglas Fir Bark Buamscha and Altland
- 49. Douglas Fir Bark Water Holding Capacity 27% 37% 45% - 65% Buamscha and Altland 50% 35% 10% - 30%
- 52. Mineral aggregate Raw Clay Selection & Mining Primary Crusher Secondary Crusher Dryer (RVM) Mill Screen Rotary Kiln (LVM) Oil-Dri Corporation of America Bag or Bulk ≤ 800 °C ≈ 120°C
- 54. Mineral aggregate Shulze, D.G., 2002. An introduction to soil mineralogy. In: Soil Mineralogy with Environmental Applications SSSA Book Series no. 7.
- 55. Mineral Aggregate Montmorillonite Palygorskite Shulze, D.G., 2002. An introduction to soil mineralogy. In: Soil Mineralogy with Environmental Applications SSSA Book Series no. 7.
- 56. Amendment Montmorillonite Palygorskite Surface Area ≈ 90 m 2 /g CEC ≈ 100 cmol c kg Oil-Dri Corporation of America Clinoptilolite Surface Area ≈ 40 m 2 /g CEC ≈ 250 cmol c kg Surface Area ≈ 120 m 2 /g CEC ≈ 20 cmol c kg
- 57. Amendment Shulze, D.G., 2002. An introduction to soil mineralogy. In: Soil Mineralogy with Environmental Applications SSSA Book Series no. 7. Heating Dehydration Natural Occurring Low Volatile Material Palygorskite and Zeolite
- 58. Amendment Heating Dehydration Natural Occurring Low Volatile Material Shulze, D.G., 2002. An introduction to soil mineralogy. In: Soil Mineralogy with Environmental Applications SSSA Book Series no. 7. Montmorillonite
- 62. Coir
- 63. Coir Sri Lanka and Mexico
- 65. Coir 51% 41% Internal 12% 41% Surface PEAT VS COIR Porosity
- 66. Coir Wettability! 51% 41% Internal 12% 41% Surface PEAT VS COIR Porosity
- 69. Compost
- 73. Pine Bark Mixtures 37%
- 74. Pine Bark Mixtures 37% Inc. Air Space Inc. Available water
- 75. Clay amended pine bark PRACTICAL APPLICATION
- 77. Clay Rate Porometer Results
- 78. Clay Rate
- 79. Clay Rate
- 80. Clay Rate
- 81. Clay Rate
- 82. Clay Rate Normal Range
- 83. Clay Rate
- 84. Clay Rate Max. = 12%
- 85. Clay Rate
- 86. Clay Rate Max. = 11%
- 87. Clay Rate
- 88. Plastic bag method FIELD QUANTIFICATION
- 90. Field Quantification Known container volume
- 91. Field Quantification Fill, pack, remove excess
- 92. Field Quantification Saturate with known volume = total porosity (weight can also be used)
- 93. Field Quantification Drain a known volume = air space
- 94. Field Quantification Container Capacity = total porosity - air space
- 95. Field Quantification Bulk Density = dry weight / container volume
- 97. QUESTIONS