Table 3 XCT-derived total number of pores, macropores, and mesopores 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) across 0–40 cm depth.

Brookings site

Treatment

 CK

2075^bc†

672^c

345^c

341^a

279^ab

89^c

35^d

49^a

1796^bc

583^c

310^c

292^a

 MF

2005^bc

826^bc

691^a

387^a

234^b

89^c

76^ab

64^a

1778^bc

737^bc

615^a

323^a

 HF

1555^c

778^c

626^ab

401^a

205^b

115^bc

66^abc

65^a

1349^c

661^c

559^a

337^a

 LM

3144^ab

928^bc

454^bc

498^a

389^a

138^ab

59^bcd

81^a

2755^ab

790^bc

396^bc

417^a

 MM

3528^a

1358^a

405^c

395^a

407^a

170^a

38 ^cd

59^a

3121^a

1187^a

367^c

337^a

 HM

2159^bc

1088^ab

646^a

551^a

284^ab

152^ab

94^a

79^a

1875^bc

936^b

552^ab

547^a

Analysis of variance (p > F)

0.0009

 < 0.0001

 < 0.0001

0.1279

0.0010

 < 0.0001

 < 0.0001

0.2465

0.0009

 < 0.0001

 < 0.0001

0.0808

Beresford site

Treatment

 CK

2732^a†

2372^a

2303^a

1297^b

233^a

195^a

168^a

164^a

2499^a

2177^a

2135^a

1133^b

 MF

2997^a

2859^a

2489^a

2091^ab

245^a

189^a

167^a

153^a

2752^a

2670^a

2323^a

1938^ab

 HF

3327^a

3096^a

2979^a

2240^ab

253^a

262^a

232^a

192^a

3074^a

2834^a

2748^a

2048^ab

 LM

3133^a

2782^a

2669^a

2226^ab

244^a

219^a

210^a

182^a

2889^a

2562^a

2450^a

2043^ab

 MM

3125^a

2938^a

2925^a

2565^a

303^a

273^a

191^a

178^a

2822^a

2665^a

2374^a

2387^a

 HM

3453^a

2970^a

2983^a

2452^a

272^a

243^a

229^a

222^a

3810^a

2727^a

2754^a

2230^a

Analysis of variance (p > F)

0.5445

0.1575

0.5311

0.0251

0.5733

0.4459

0.336

0.1420

0.5699

0.2304

0.5577

0.0268