88:(PWP) but also the ability of root penetration. This is measured as soil mechanical resistance taken at an arbitrary value, say penetration at 3 MPa. The lower limit is defined as:
67:(FC), but also the capability of providing adequate aeration for plant roots (usually taken as a minimum air filled porosity of 10%). The upper limit is then defined as:
142:
Da Silva A P, Kay B D and
Perfect E 1994 Characterization of the least limiting water range of soils. Soil Sci. Soc. Am. J. 58, 1775-1781.
130:
49:
85:
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introduced the NLWR concept in an attempt to integrate several physical properties associated with plant or
145:
Letey J 1985 Relationship between soil physical properties and crop production. Adv. Soil Sci. 1, 277-294.
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125:
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ODR value of 0.2 micro-g/cm2/min as criteria for satisfactory aeration status.
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The upper limit (wet end) of LLWR is determined not only by water content at
78:
37:
45:
29:
73:
Rather than air-filled porosity at 10%, LaoSheng Wu from
40:, or soil strength) are minimal. John Letey (1985) from
56:, Ontario) (1994) refined the concept and termed it
52:. Alvaro Pires da Silva, Bev Kay, and Ed Perfect (
84:The lower limit (dry end) is not only limited to
8:
91:max q {mechanical resistance = 3 MPa, PWP}.
32:where limitations to plant growth (such as
77:proposed moisture content where Oxygen
70:min q {air filled porosity = 0.1, FC}.
7:
14:
48:growth to refine the concept of
131:Soil plant atmosphere continuum
1:
175:
58:least limiting water range
24:) represents the range of
50:available water capacity
18:non-limiting water range
86:permanent wilting point
126:Pedotransfer function
106:Irrigation scheduling
54:University of Guelph
116:Moisture equivalent
79:gas diffusion rate
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121:Moisture stress
111:Limiting factor
101:Integral energy
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34:water potential
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65:field capacity
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36:, air-filled
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26:water content
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159:Soil physics
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75:UC Riverside
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42:UC Riverside
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137:References
153:Category
95:See also
60:(LLWR).
38:porosity
28:in the
46:root
30:soil
22:NLWR
16:The
155::
20:(
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