model term

TC

TN

P

K

Cu

Zn

bd

PR

PAW

WSA

fertilizer/poultry litter

<0.0001

<0.0001

<0.0001

<0.0001

<0.0001

<0.0001

<0.0001

<0.0001

<0.0001

<0.0001

soil amendment (biochar/lignite)

<0.0001

0.23

0.69

0.4

<0.0001

0.29

<0.0001

<0.0001

<0.0001

<0.0001

depth

<0.0001

<0.0001

<0.0001

<0.0001

<0.0001

<0.0001

<0.0001

<0.0001

<0.0001

0.5

fertilizer × amendment

<0.0001

0.32

0.024

0.0032

0.011

0.13

<0.0001

<0.0001

<0.0001

<0.0001

fertilizer × depth

0.00034

0.018

0.26

0.42

0.00023

0.0028

0.41

<0.0001

<0.0001

<0.0001

amendment × depth

0.0047

0.58

0.02

0.11

0.014

0.12

0.025

<0.0001

<0.0001

0.0014

fertilizer × amendment × depth

0.9

0.85

0.36

0.86

0.45

0.7

0.4

<0.0001

<0.0001

0.075