Table 2 XCT-derived macroporosity, mesoporosity, porosity total number of pores, macropores, and mesopore as influenced by long-term medium fertilizer (MF), high fertilizer (HF), low manure (LM), medium manure (MM), high manure (HM) rate applications, and control (CK) as a function treatment and soil depth.

Brookings site

Treatment

 CK

858^a†

113^a

745^a

0.010^a

0.007^ab

0.003^a

 MF

977^a

116^a

861^a

0.009^a

0.005^b

0.002^a

 HF

839^a

113^a

726^a

0.012^a

0.008^ab

0.002^a

 LM

1256^a

166^a

1089^a

0.013^a

0.010^ab

0.003^a

 MM

1421^a

168^a

1253^a

0.017^a

0.010^a

0.004^a

 HM

1111^a

152^a

978^a

0.014^a

0.009^ab

0.003^a

Depth (cm)

 0–10

2411^a

299^a

2111^a

0.020^a

0.013^a

0.007^a

 10–20

941^b

125^b

815^b

0.010^b

0.010^b

0.002^bc

 20–30

528^c

61^c

466^c

0.015^b

0.006^c

0.002^b

 30–40

428^c

66^c

375^c

0.005^c

0.003^d

0.001^c

Analysis of variance (P > F)

Treatments

0.4170

0.4398

0.4017

0.1489

0.0358

0.4757

Depth

 < 0.0001

 < 0.0001

 < 0.0001

 < 0.0001

 < 0.0001

 < 0.0001

Trt × Depth

 < 0.0001

 < 0.0001

 < 0.0001

 < 0.0001

 < 0.0001

 < 0.0001

Beresford site

Treatment

 CK

2176^b†

190^a

1986^b

0.020^c

0.014^b

0.006^c

 MF

2609^ab

188^a

2421^ab

0.024^bc

0.016^ab

0.008^bc

 HF

2911^a

235^a

2676^a

0.024^bc

0.014^b

0.010^ab

 LM

2703^ab

214^a

2488^ab

0.028^ab

0.019^a

0.009^abc

 MM

2888^a

237^a

2652^a

0.025^bc

0.017^ab

0.008^abc

 HM

2965^a

242^a

2723^a

0.031^a

0.020^a

0.011^a

Depth (cm)

 0–10

3128^a

258^a

2869^a

0.029^a

0.020^a

0.010^a

 10–20

2836^a

230^ab

2606^a

0.025^ab

0.018^ab

0.008^a

 20–30

2725^a

199^bc

2525^a

0.026^ab

0.015^bc

0.008^a

 30–40

2145^b

182^c

1963^b

0.023^b

0.014^c

0.008^a

Analysis of Variance (P > F)

Treatments

0.0036

0.0318

0.0051

 < 0.0001

 < 0.0001

 < 0.0001

Depth

 < 0.0001

 < 0.0001

 < 0.0001

0.0035

 < 0.0001

0.2291

Trt × Depth

0.9915

0.9610

0.9810

 < 0.0001

0.0062

0.0037