Table 1. Selected characteristics of the dominant soils in MLRA 134 that relate to water and solute transport.
Great group   Approximate Drainage   Slope Hydrologic
/Series  Family Area Class  Permeability Range Group
acres
%
Hapludults            
Brandon Fine-silty, mixed, thermic Typic  138,360 well moderate/rapid 2 - 50 B
Hapludalfs            
Memphis Fine-silty, mixed, thermic Typic  1,827,159 well moderate 0 - 45 B
Fluvaquents            
Arkabutla Fine-silty, mixed, acid, thermic Aeric 336,280 somewhat poorly moderate 0 - 2 C
Falaya Coarse-silty, mixed, acid, thermic Aeric 919,417 somewhat poorly moderate 0 - 2 D
Gillsburg Coarse-silty, mixed, acid, thermic Aeric 113,587 somewhat poorly moderate/slow 0 - 2 C
Rosebloom Fine-silty, mixed, acid, thermic Typic 135,573 poorly moderate 0 - 2 D
Waverly Coarse-silty, mixed, acid thermic Typic 349,171 poorly moderate 0 - 2 D
Fragiudalfs            
Bude Fine-silty, mixed, thermic Glossaquic 132,917 somewhat poorly slow 0 - 5 C
Calloway Fine-silty, mixed, thermic Glossaquic 834,992 somewhat poorly slow 0 - 5 C
Grenada Fine-silty, mixed, thermic Glossic 1,244,570 moderately well moderate/slow 0 - 12 C
Loring Fine-silty, mixed, thermic Oxyaquic 2,098,125 moderately well moderate 0 - 20 C
Providence Fine-silty, mixed, thermic Typic 1,020,349 moderately well moderately slow 0 - 15 C
Fragiaqualfs            
Henry Coarse-silty, mixed, thermic Typic 487,267 poorly  slow 0 - 2 D
Glossaqualfs            
Calhoun Fine-silty, mixed, thermic Typic 561,108 poorly slow 0 - 1 D
Frost Fine-silty, mixed, thermic Typic 153,132 poorly slow 0 - 1 D
Gilbert Fine-silty, mixed, thermic Typic 124,251 poorly very slow 0 - 1 C
Paleudalfs            
Falkner Fine-silty, siliceous, thermic Aquic 102,041 somewhat poorly slow 0 - 8 C
Tippah Fine-silty, mixed, thermic Aquic 158,546 moderately well moderate/slow 0 - 12 C
Hapludalfs            
Lexington Fine-silty, mixed, thermic Ultic 309,371 well moderate 0 - 30 B
Udifluvents            
Adler Coarse-silty, mixed, nonacid, thermic Aquic 333,160 moderately well moderate 0 - 2 C
Collins Coarse-silty, mixed, acid, thermic Aquic 626,963 moderately well moderate 0 - 2 C
Dystrochrepts            
Ariel Coarse-silty, mixed, thermic Fluventic 146,088 well moderately slow 0 - 2 C
Oaklimeter Coarse-silty, mixed, thermic Fluvaquentic 270,567 moderately well moderate 0 - 2 C
Albaqualfs            
Crowley Fine, montmorillonitic, thermic Typic 270,628 somewhat poorly very slow 0 - 3 D
Natrudalfs            
Stuttgart Fine, montorillonitic, thermic Typic 186,268 mod. well / very slow 0 - 3 D
Argiaquolls            
Jeanerette Fine-silty, mixed, thermic Typic 157,412 poor slow 0 - 1 D
Ochraqualfs            
Patoutville Fine-silty, mixed, thermic Aeric 181,845 somewhat poorly slow 0 - 3 C
Eutrochrepts            
Natchez Coarse-silty, mixed, thermic Typic 181,104 well moderate 12 - 50 B
Epiaqualfs            
Routon Fine-silty, mixed, thermic Typic  103,171 poorly slow 0 - 3 D
Endoaqualfs            
Tichnor Fine-silty, mixed, thermic Typic 194,455 poorly moderately slow 0 - 3 D

 

Table 2. Morphological description of the Stuttgart soil at the study site in Arkansas.
Location: Rice Research and Extension Center, Stuttgart, Arkansas.
Taxonomic class: fine, montmorillonitic, thermic Typic Natrudalfs
Site Pedon Characteristics:
Horizon Depth (cm) Textural class Structure
Ap 0 - 12 silt loam weak medium subangular blocky
Apd 12-15 silt loam moderate medium platy
E1 15 - 28 silt loam weak medium subangular blocky
E2 28 - 47 silt loam moderate medium subangular blocky
BE 47 - 56 silt loam moderate medium subangular blocky
Bt1/Eg1 56 - 70 silty clay loam moderate medium angular blocky
Bt2/Eg2 70 - 87 silty clay moderate medium angular blocky
Bt 87 - 104 silty clay weak coarse angular blocky
Bt6 104 - 125+ silty clay weak coarse angular blocky

 
 

Table 3. Physical properties of the Stuttgart soil at the sampling site.
Soil Bulk Saturated K Textural Composition   Organic
Depth Density (Geometric Mean) Sand Silt Clay pH Carbon
cm Mg m-3 cm h-1 ----------%---------   %
5 1.226 0.50 2.8 82.9 14.2 5.7 1.15
15 1.427 0.25 5.1 77.4 17.5 6.6 0.69
25 1.454 0.32 4.8 74.4 20.7 5.8 0.56
35 1.462 1.14 4.2 70.1 25.7 5.2 0.50
45 1.412 1.20 4.4 64.8 30.7 5.1 0.43
55 1.425 0.01 7.2 69.1 23.8 5.3 0.33
65 1.420 0.001 4.6 60.7 34.7 5.2 0.35
75 1.443 9.22E-05 4.0 51.5 44.5 5.4 0.45
85 1.560 3.76E-05 3.5 46.5 49.9 5.2 0.49
95 1.630 3.53E-05 3.5 48.7 47.8 5.3 0.41

 

Table 4. Soil Characteristics of the Gigger soil series at the study site in Louisiana.
     
----- Sand size fractions (mm) -----
          
Plot Horizon Depth 2-1 1-.5 5-.25 .25-.1 .1-.05 Sand Silt Clay2 Bd1 Ksat1
cm % % % % % % % % Mg m-3 m h-1
Plot 1 Ap 0-11 3.0 0.5 1.5 4.0 12.0 21.0 69.0 10.0 1.52 0.649
& B21t 11-23 8.0 0.8 3.3 3.5 8.5 24.5 63.0 12.5 1.63 0.521
Plot 2 B22t 23-45 6.5 1.5 3.5 4.5 9.5 25.5 60.0 14.5 1.57 0.415
  Bx1 45-64 5.0 2.0 3.0 5.5 10.5 26.0 59.5 14.5 1.53 0.381
  Bx2 64-91 10.0 2.5 3.5 4.5 8.5 29.0 49.0 22.0 1.61 0.200
  Bx3 91-135 3.0 0.5 1.0 3.0 8.0 15.5 59.5 25.0 1.60 0.034
  B23t 135-154 5.0 1.5 2.5 4.0 9.5 22.5 58.5 19.0 1.53 0.040
1Bd = Bulk Density; Ksat = Saturated Hydraulic Conductivity.
2The lower-than-expected clay content of horizon B21t and B22t suggests that the profiles of plots 1 and plot 2 are taxadjuncts to the Gigger series.

 

Table 5. Soil characteristics of the Grenada soil series at the study site in Louisiana.
     
----- Sand size fractions (mm) -----
          
Plot Horizon Depth 2-1 1-.5 5-.25 .25-.1 .1-.05 Sand Silt Clay Bd1 Ksat1
cm % % % % % % % % Mg m-3 m h-1
Plot 1 Ap 0-15 1.50 1.83 2.67 3.67 6.67 16.33 67.00 16.67 1.42 0.075
Plot 2 A2 15-31 1.67 2.00 2.33 2.87 4.80 13.67 62.67 23.67 1.46 0.178
& B2 31-43 1.67 2.17 2.87 3.30 5.33 15.33 55.00 29.67 1.45 0.097
Plot 3 A'2 43-56 1.67 2.50 2.80 2.20 4.17 13.00 53.33 33.67 1.36 0.364
  B'x1 56-89 1.67 2.33 1.83 2.83 5.00 13.67 56.00 30.33 1.30 0.336
  B'x2 89-107 2.27 2.27 2.97 3.00 4.67 15.00 58.00 27.00 1.34 0.304
1Bd = Bulk Density; Ksat = Saturated hydraulic conductivity.

 

Table 6. Values of the parameters qr, a, and h for each plot of the Grenada soil in Louisiana as obtained by least-square fit of van Genuchten model.
Horizon
qr
a
h
Ap 0.081 0.0022 2.478
A2 0.152 0.0034 1.939
B2 0.247 0.0030 2.347
A'2 0.245 0.0034 2.043
B'x1 0.184 0.0074 1.462
B'x2 0.191 0.0074 1.473

 

Table 7. Profile description of Memphis soil at Mississippi site.
Profile Description:
Soil series: Memphis  
Location: Church Hill, Jefferson County Mississippi
Classification: Fine-silty, mixed, thermic Typic Hapludalf
Pedon Description:
Horizon Depth (cm) Description
Ap 0-15 Brown (10YR 4/3) silt loam; weak, fine granular structure; very friable; many fine roots; many fine continuous pores; moderately acid; clear, smooth boundary.
BA 15-34 Dark yellowish brown (10YR 4/4) silt loam; medium subangular blocky structure; friable; fine roots and few medium roots; common fine continuous pores; moderately acid; smooth boundary.
Bt1 34-56 Dark brown (7.5YR 3/4) silt loam; medium subangular blocky structure; distinct light brown (7.5YR 6/3) fine silt to clay film on faces of peds and lining pores; few fine roots; common continuous pores; moderately acid; clear, smooth boundary.
Bt2 56-100 Brown (7.5YR 4/4) silt loam; medium subangular blocky structure; friable; light brown (7.5YR 6/3) clay film on faces of peds and lining pores; moderately acid; smooth boundary.
Bt3 100-145+ Brown (7.5YR 4/3) silt loam; weak, medium subangular blocky structure; friable; common fine and few medium pores; gradual clay film depletion on peds and pores; moderately acid; lower boundary not observed.

Table 8. Physical properties of the Memphis series in Mississippi.
Soil Bulk   Particle Size Water Content
Depth Density Ksat Sand Silt Clay -33 kPa -1500 kPa
cm Mg m-3 cm h-1 ----------------%--------------- m3 m-3  m3 m-3
10 1.420 0.094 7.0 63.3 29.7 0.349 0.175
20 1.600 1.181 1.6 74.6 23.8 0.321 0.147
30 1.512 0.003 3.6 66.6 29.8 0.342 0.171
40 1.620 0.007 3.7 66.6 29.7 0.316 0.159
50 1.551 0.072 9.5 66.5 24.0 0.311 0.145
60 1.455 0.008 7.6 63.8 28.6 0.333 0.164
70 1.548 0.561 5.6 68.6 25.8 0.296 0.139
80 1.545 0.011 5.6 68.4 26.0 0.296 0.139
90 1.566 0.014 6.0 70.4 23.6 0.287 0.129
100 1.476 0.155 1.6 78.6 19.8 0.284 0.115
110 1.476 0.007 0.4 80.0 19.6 0.287 0.116
120 1.423 0.831 1.9 76.3 21.3 0.294 0.123

 

Table 9. Chemical properties of the Memphis series in Mississippi.
Soil Carbon                  
Depth Content pH EC NO3 -N P K Ca Mg Na Mn
cm %   mmhos cm-1 --------------------------kg ha-1 -------------------------
10 0.94 5.2 40 6.72 71.68 134.40 1163.68 236.32 96.32 68.32
20 0.81 5.5 25 2.24 33.60 156.80 2208.64 464.80 118.72 85.12
30 0.73 5.3 32 1.12 70.56 215.04 3013.92 706.72 148.96 10.08
40 0.23 5.5 31 1.12 89.60 224.00 2980.32 698.88 148.96 11.20
50 0.09 5.5 30 1.12 125.44 221.76 2905.28 688.80 151.20 20.16
60 0.07 5.2 33 1.12 138.88 227.36 2843.68 687.68 172.48 12.32
70 0.07 5.4 54 1.12 129.92 224.36 2850.40 725.76 156.80 12.32
80 0.07 5.5 78 1.12 126.56 213.92 2759.68 711.20 152.32 12.32
90 0.07 5.5 64 1.12 124.32 211.68 2767.52 719.04 170.24 16.80
100 0.07 5.6 67 1.12 131.04 208.32 2693.60 697.76 167.00 20.16
110 0.06 5.6 64 1.12 125.44 207.20 2671.20 707.84 163.52 22.40
120 0.06 5.7 48 1.12 128.80 196.00 2615.20 695.52 161.28 30.24

 

Table 10. Summary of bromide mass balance and associated rainfall.
  Additional Cumulative Br
Time Rainfall Rainfall Recovered
days mm mm %
0 0 0 100
12 69 69 77.6
19 66 135 60.4
39 64 199 57.5
66 51 250 31.8
78 64 314 30.1
203 71 385 24.6
213 456 841 24.1
313 186 1027 18.1