Results

Across the years there were significant differences between cover crops in the subsoiling treatment with the fodder radish treatment having a significantly lower nitrate leaching than the other cover crops.

See:

2021-2023 LB Fodder radish / SS Fodder radish 1.646 0.2106 224 1 3.892 0.0071 SS Fodder radish / SS Black oats 0.631 0.0808 224 1 -3.596 0.0200 SS Fodder radish / SS Tall fescue 0.636 0.0820 224 1 -3.512 0.0262

2021 LB Fodder radish / SS Fodder radish 1.646 0.2106 224 1 3.892 0.0071 SS Fodder radish / SS Black oats 0.631 0.0808 224 1 -3.596 0.0200 SS Fodder radish / SS Tall fescue 0.636 0.0820 224 1 -3.512 0.0262

2022 LB Fodder radish / SS Fodder radish 1.646 0.2106 224 1 3.892 0.0071 SS Fodder radish / SS Black oats 0.631 0.0808 224 1 -3.596 0.0200 SS Fodder radish / SS Tall fescue 0.636 0.0820 224 1 -3.512 0.0262

2023 LB Fodder radish / SS Fodder radish 1.646 0.2106 224 1 3.892 0.0071 SS Fodder radish / SS Black oats 0.631 0.0808 224 1 -3.596 0.0200 SS Fodder radish / SS Tall fescue 0.636 0.0820 224 1 -3.512 0.0262

                
                 Fodder radish Black oats Tall fescue
  Ref                       20         20          20
  Compost                    0          0           0
  LB                        20         20          20
  LB extensive               0          0           0
  LB Sand                    0          0           0
  SB                        20         20          20
  SS                        20         20          20
  SS Caterpillar             0          0           0


Call:
lm(formula = log(no3_meting_gw_mg_no3_l) ~ ondgr_bw + gr_bem + 
    row + blok + jaar + ondgr_bw:gr_bem, data = dataset)

Coefficients:
                 (Intercept)                    ondgr_bwLB  
                    5.002343                      0.092866  
                  ondgr_bwSB                    ondgr_bwSS  
                   -0.009104                     -0.405274  
            gr_bemBlack oats             gr_bemTall fescue  
                   -0.077578                     -0.199451  
                         row                          blok  
                   -0.037789                      0.103145  
                    jaar2022                      jaar2023  
                   -0.299659                     -0.164414  
 ondgr_bwLB:gr_bemBlack oats   ondgr_bwSB:gr_bemBlack oats  
                   -0.126369                      0.038257  
 ondgr_bwSS:gr_bemBlack oats  ondgr_bwLB:gr_bemTall fescue  
                    0.537597                     -0.108477  
ondgr_bwSB:gr_bemTall fescue  ondgr_bwSS:gr_bemTall fescue  
                    0.089926                      0.652331  

    studentized Breusch-Pagan test

data:  md
BP = 32.398, df = 15, p-value = 0.00568
Analysis of Variance Table

Response: log(no3_meting_gw_mg_no3_l)
                 Df Sum Sq Mean Sq F value    Pr(>F)    
ondgr_bw          3  0.048 0.01589  0.0975 0.9613677    
gr_bem            2  0.521 0.26046  1.5980 0.2045921    
row               1  0.515 0.51530  3.1616 0.0767465 .  
blok              1  1.682 1.68197 10.3197 0.0015098 ** 
jaar              2  3.890 1.94485 11.9325  1.19e-05 ***
ondgr_bw:gr_bem   6  4.005 0.66755  4.0957 0.0006389 ***
Residuals       224 36.509 0.16299                      
---
Signif. codes:  0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1


    Asymptotic one-sample Kolmogorov-Smirnov test

data:  resid(md)
D = 0.043011, p-value = 0.7663
alternative hypothesis: two-sided
$emmeans
 ondgr_bw gr_bem        response    SE  df lower.CL upper.CL
 Ref      Fodder radish      138 12.81 224    114.9      166
 LB       Fodder radish      151 13.70 224    126.6      181
 SB       Fodder radish      137 12.70 224    113.8      164
 SS       Fodder radish       92  8.36 224     76.9      110
 Ref      Black oats         128 11.57 224    106.8      153
 LB       Black oats         123 11.33 224    103.0      148
 SB       Black oats         131 12.03 224    109.7      157
 SS       Black oats         146 13.40 224    121.6      175
 Ref      Tall fescue        113 10.47 224     94.1      136
 LB       Tall fescue        111 10.78 224     91.9      135
 SB       Tall fescue        123 11.13 224    102.4      147
 SS       Tall fescue        145 13.17 224    120.9      173

Results are averaged over the levels of: jaar 
Confidence level used: 0.95 
Intervals are back-transformed from the log scale 

$contrasts
 contrast                             ratio     SE  df null t.ratio p.value
 Ref Fodder radish / LB Fodder radish 0.911 0.1178 224    1  -0.719  0.9999
 Ref Fodder radish / SB Fodder radish 1.009 0.1288 224    1   0.071  1.0000
 Ref Fodder radish / SS Fodder radish 1.500 0.1964 224    1   3.095  0.0900
 Ref Fodder radish / Ref Black oats   1.081 0.1409 224    1   0.595  1.0000
 Ref Fodder radish / LB Black oats    1.117 0.1483 224    1   0.837  0.9995
 Ref Fodder radish / SB Black oats    1.050 0.1388 224    1   0.366  1.0000
 Ref Fodder radish / SS Black oats    0.947 0.1259 224    1  -0.412  1.0000
 Ref Fodder radish / Ref Tall fescue  1.221 0.1637 224    1   1.488  0.9426
 Ref Fodder radish / LB Tall fescue   1.240 0.1592 224    1   1.675  0.8777
 Ref Fodder radish / SB Tall fescue   1.126 0.1474 224    1   0.906  0.9990
 Ref Fodder radish / SS Tall fescue   0.954 0.1222 224    1  -0.372  1.0000
 LB Fodder radish / SB Fodder radish  1.107 0.1431 224    1   0.789  0.9997
 LB Fodder radish / SS Fodder radish  1.646 0.2106 224    1   3.892  0.0071
 LB Fodder radish / Ref Black oats    1.186 0.1516 224    1   1.333  0.9738
 LB Fodder radish / LB Black oats     1.226 0.1578 224    1   1.585  0.9131
 LB Fodder radish / SB Black oats     1.152 0.1480 224    1   1.100  0.9945
 LB Fodder radish / SS Black oats     1.039 0.1338 224    1   0.296  1.0000
 LB Fodder radish / Ref Tall fescue   1.340 0.1733 224    1   2.260  0.5085
 LB Fodder radish / LB Tall fescue    1.361 0.1796 224    1   2.332  0.4570
 LB Fodder radish / SB Tall fescue    1.236 0.1581 224    1   1.652  0.8872
 LB Fodder radish / SS Tall fescue    1.046 0.1339 224    1   0.354  1.0000
 SB Fodder radish / SS Fodder radish  1.486 0.1946 224    1   3.026  0.1081
 SB Fodder radish / Ref Black oats    1.071 0.1396 224    1   0.525  1.0000
 SB Fodder radish / LB Black oats     1.107 0.1470 224    1   0.768  0.9998
 SB Fodder radish / SB Black oats     1.040 0.1376 224    1   0.297  1.0000
 SB Fodder radish / SS Black oats     0.938 0.1248 224    1  -0.480  1.0000
 SB Fodder radish / Ref Tall fescue   1.210 0.1622 224    1   1.420  0.9586
 SB Fodder radish / LB Tall fescue    1.229 0.1578 224    1   1.604  0.9060
 SB Fodder radish / SB Tall fescue    1.116 0.1461 224    1   0.836  0.9995
 SB Fodder radish / SS Tall fescue    0.945 0.1211 224    1  -0.443  1.0000
 SS Fodder radish / Ref Black oats    0.721 0.0920 224    1  -2.566  0.3054
 SS Fodder radish / LB Black oats     0.745 0.0953 224    1  -2.301  0.4793
 SS Fodder radish / SB Black oats     0.700 0.0894 224    1  -2.793  0.1904
 SS Fodder radish / SS Black oats     0.631 0.0808 224    1  -3.596  0.0200
 SS Fodder radish / Ref Tall fescue   0.814 0.1044 224    1  -1.605  0.9056
 SS Fodder radish / LB Tall fescue    0.827 0.1113 224    1  -1.413  0.9600
 SS Fodder radish / SB Tall fescue    0.751 0.0958 224    1  -2.245  0.5188
 SS Fodder radish / SS Tall fescue    0.636 0.0820 224    1  -3.512  0.0262
 Ref Black oats / LB Black oats       1.034 0.1324 224    1   0.262  1.0000
 Ref Black oats / SB Black oats       0.971 0.1243 224    1  -0.228  1.0000
 Ref Black oats / SS Black oats       0.876 0.1123 224    1  -1.033  0.9968
 Ref Black oats / Ref Tall fescue     1.130 0.1451 224    1   0.948  0.9985
 Ref Black oats / LB Tall fescue      1.147 0.1535 224    1   1.028  0.9969
 Ref Black oats / SB Tall fescue      1.042 0.1330 224    1   0.321  1.0000
 Ref Black oats / SS Tall fescue      0.882 0.1135 224    1  -0.973  0.9981
 LB Black oats / SB Black oats        0.939 0.1199 224    1  -0.491  1.0000
 LB Black oats / SS Black oats        0.847 0.1082 224    1  -1.299  0.9786
 LB Black oats / Ref Tall fescue      1.092 0.1396 224    1   0.692  0.9999
 LB Black oats / LB Tall fescue       1.110 0.1521 224    1   0.758  0.9998
 LB Black oats / SB Tall fescue       1.008 0.1288 224    1   0.059  1.0000
 LB Black oats / SS Tall fescue       0.853 0.1111 224    1  -1.219  0.9870
 SB Black oats / SS Black oats        0.902 0.1152 224    1  -0.808  0.9997
 SB Black oats / Ref Tall fescue      1.163 0.1487 224    1   1.182  0.9899
 SB Black oats / LB Tall fescue       1.181 0.1612 224    1   1.221  0.9868
 SB Black oats / SB Tall fescue       1.073 0.1371 224    1   0.549  1.0000
 SB Black oats / SS Tall fescue       0.908 0.1179 224    1  -0.740  0.9999
 SS Black oats / Ref Tall fescue      1.289 0.1647 224    1   1.990  0.6996
 SS Black oats / LB Tall fescue       1.310 0.1800 224    1   1.963  0.7178
 SS Black oats / SB Tall fescue       1.189 0.1521 224    1   1.355  0.9705
 SS Black oats / SS Tall fescue       1.007 0.1313 224    1   0.055  1.0000
 Ref Tall fescue / LB Tall fescue     1.016 0.1410 224    1   0.112  1.0000
 Ref Tall fescue / SB Tall fescue     0.922 0.1183 224    1  -0.630  1.0000
 Ref Tall fescue / SS Tall fescue     0.781 0.1024 224    1  -1.884  0.7680
 LB Tall fescue / SB Tall fescue      0.908 0.1223 224    1  -0.716  0.9999
 LB Tall fescue / SS Tall fescue      0.769 0.1000 224    1  -2.020  0.6791
 SB Tall fescue / SS Tall fescue      0.847 0.1092 224    1  -1.289  0.9798

Results are averaged over the levels of: jaar 
P value adjustment: tukey method for comparing a family of 12 estimates 
Tests are performed on the log scale 

$emmeans
jaar = 2021:
 ondgr_bw gr_bem        response    SE  df lower.CL upper.CL
 Ref      Fodder radish    161.0 16.24 224    132.0      196
 LB       Fodder radish    176.7 17.44 224    145.5      215
 SB       Fodder radish    159.6 16.09 224    130.8      195
 SS       Fodder radish    107.4 10.63 224     88.3      130
 Ref      Black oats       149.0 14.72 224    122.6      181
 LB       Black oats       144.1 14.39 224    118.3      175
 SB       Black oats       153.4 15.28 224    126.1      187
 SS       Black oats       170.1 17.01 224    139.7      207
 Ref      Tall fescue      131.9 13.28 224    108.2      161
 LB       Tall fescue      129.9 13.58 224    105.7      160
 SB       Tall fescue      143.0 14.16 224    117.7      174
 SS       Tall fescue      168.9 16.75 224    138.9      205

jaar = 2022:
 ondgr_bw gr_bem        response    SE  df lower.CL upper.CL
 Ref      Fodder radish    119.3 11.58 224     98.6      144
 LB       Fodder radish    130.9 12.41 224    108.6      158
 SB       Fodder radish    118.2 11.48 224     97.7      143
 SS       Fodder radish     79.6  7.57 224     66.0       96
 Ref      Black oats       110.4 10.48 224     91.6      133
 LB       Black oats       106.8 10.25 224     88.4      129
 SB       Black oats       113.7 10.89 224     94.1      137
 SS       Black oats       126.0 12.12 224    104.3      152
 Ref      Tall fescue       97.8  9.47 224     80.8      118
 LB       Tall fescue       96.2  9.71 224     78.9      117
 SB       Tall fescue      106.0 10.08 224     87.9      128
 SS       Tall fescue      125.1 11.93 224    103.7      151

jaar = 2023:
 ondgr_bw gr_bem        response    SE  df lower.CL upper.CL
 Ref      Fodder radish    136.6 14.10 224    111.5      167
 LB       Fodder radish    149.9 15.15 224    122.8      183
 SB       Fodder radish    135.4 13.97 224    110.5      166
 SS       Fodder radish     91.1  9.23 224     74.6      111
 Ref      Black oats       126.4 12.79 224    103.6      154
 LB       Black oats       122.2 12.50 224     99.9      150
 SB       Black oats       130.2 13.27 224    106.5      159
 SS       Black oats       144.3 14.77 224    117.9      177
 Ref      Tall fescue      111.9 11.53 224     91.3      137
 LB       Tall fescue      110.2 11.77 224     89.3      136
 SB       Tall fescue      121.3 12.30 224     99.4      148
 SS       Tall fescue      143.3 14.55 224    117.3      175

Confidence level used: 0.95 
Intervals are back-transformed from the log scale 

$contrasts
jaar = 2021:
 contrast                             ratio     SE  df null t.ratio p.value
 Ref Fodder radish / LB Fodder radish 0.911 0.1178 224    1  -0.719  0.9999
 Ref Fodder radish / SB Fodder radish 1.009 0.1288 224    1   0.071  1.0000
 Ref Fodder radish / SS Fodder radish 1.500 0.1964 224    1   3.095  0.0900
 Ref Fodder radish / Ref Black oats   1.081 0.1409 224    1   0.595  1.0000
 Ref Fodder radish / LB Black oats    1.117 0.1483 224    1   0.837  0.9995
 Ref Fodder radish / SB Black oats    1.050 0.1388 224    1   0.366  1.0000
 Ref Fodder radish / SS Black oats    0.947 0.1259 224    1  -0.412  1.0000
 Ref Fodder radish / Ref Tall fescue  1.221 0.1637 224    1   1.488  0.9426
 Ref Fodder radish / LB Tall fescue   1.240 0.1592 224    1   1.675  0.8777
 Ref Fodder radish / SB Tall fescue   1.126 0.1474 224    1   0.906  0.9990
 Ref Fodder radish / SS Tall fescue   0.954 0.1222 224    1  -0.372  1.0000
 LB Fodder radish / SB Fodder radish  1.107 0.1431 224    1   0.789  0.9997
 LB Fodder radish / SS Fodder radish  1.646 0.2106 224    1   3.892  0.0071
 LB Fodder radish / Ref Black oats    1.186 0.1516 224    1   1.333  0.9738
 LB Fodder radish / LB Black oats     1.226 0.1578 224    1   1.585  0.9131
 LB Fodder radish / SB Black oats     1.152 0.1480 224    1   1.100  0.9945
 LB Fodder radish / SS Black oats     1.039 0.1338 224    1   0.296  1.0000
 LB Fodder radish / Ref Tall fescue   1.340 0.1733 224    1   2.260  0.5085
 LB Fodder radish / LB Tall fescue    1.361 0.1796 224    1   2.332  0.4570
 LB Fodder radish / SB Tall fescue    1.236 0.1581 224    1   1.652  0.8872
 LB Fodder radish / SS Tall fescue    1.046 0.1339 224    1   0.354  1.0000
 SB Fodder radish / SS Fodder radish  1.486 0.1946 224    1   3.026  0.1081
 SB Fodder radish / Ref Black oats    1.071 0.1396 224    1   0.525  1.0000
 SB Fodder radish / LB Black oats     1.107 0.1470 224    1   0.768  0.9998
 SB Fodder radish / SB Black oats     1.040 0.1376 224    1   0.297  1.0000
 SB Fodder radish / SS Black oats     0.938 0.1248 224    1  -0.480  1.0000
 SB Fodder radish / Ref Tall fescue   1.210 0.1622 224    1   1.420  0.9586
 SB Fodder radish / LB Tall fescue    1.229 0.1578 224    1   1.604  0.9060
 SB Fodder radish / SB Tall fescue    1.116 0.1461 224    1   0.836  0.9995
 SB Fodder radish / SS Tall fescue    0.945 0.1211 224    1  -0.443  1.0000
 SS Fodder radish / Ref Black oats    0.721 0.0920 224    1  -2.566  0.3054
 SS Fodder radish / LB Black oats     0.745 0.0953 224    1  -2.301  0.4793
 SS Fodder radish / SB Black oats     0.700 0.0894 224    1  -2.793  0.1904
 SS Fodder radish / SS Black oats     0.631 0.0808 224    1  -3.596  0.0200
 SS Fodder radish / Ref Tall fescue   0.814 0.1044 224    1  -1.605  0.9056
 SS Fodder radish / LB Tall fescue    0.827 0.1113 224    1  -1.413  0.9600
 SS Fodder radish / SB Tall fescue    0.751 0.0958 224    1  -2.245  0.5188
 SS Fodder radish / SS Tall fescue    0.636 0.0820 224    1  -3.512  0.0262
 Ref Black oats / LB Black oats       1.034 0.1324 224    1   0.262  1.0000
 Ref Black oats / SB Black oats       0.971 0.1243 224    1  -0.228  1.0000
 Ref Black oats / SS Black oats       0.876 0.1123 224    1  -1.033  0.9968
 Ref Black oats / Ref Tall fescue     1.130 0.1451 224    1   0.948  0.9985
 Ref Black oats / LB Tall fescue      1.147 0.1535 224    1   1.028  0.9969
 Ref Black oats / SB Tall fescue      1.042 0.1330 224    1   0.321  1.0000
 Ref Black oats / SS Tall fescue      0.882 0.1135 224    1  -0.973  0.9981
 LB Black oats / SB Black oats        0.939 0.1199 224    1  -0.491  1.0000
 LB Black oats / SS Black oats        0.847 0.1082 224    1  -1.299  0.9786
 LB Black oats / Ref Tall fescue      1.092 0.1396 224    1   0.692  0.9999
 LB Black oats / LB Tall fescue       1.110 0.1521 224    1   0.758  0.9998
 LB Black oats / SB Tall fescue       1.008 0.1288 224    1   0.059  1.0000
 LB Black oats / SS Tall fescue       0.853 0.1111 224    1  -1.219  0.9870
 SB Black oats / SS Black oats        0.902 0.1152 224    1  -0.808  0.9997
 SB Black oats / Ref Tall fescue      1.163 0.1487 224    1   1.182  0.9899
 SB Black oats / LB Tall fescue       1.181 0.1612 224    1   1.221  0.9868
 SB Black oats / SB Tall fescue       1.073 0.1371 224    1   0.549  1.0000
 SB Black oats / SS Tall fescue       0.908 0.1179 224    1  -0.740  0.9999
 SS Black oats / Ref Tall fescue      1.289 0.1647 224    1   1.990  0.6996
 SS Black oats / LB Tall fescue       1.310 0.1800 224    1   1.963  0.7178
 SS Black oats / SB Tall fescue       1.189 0.1521 224    1   1.355  0.9705
 SS Black oats / SS Tall fescue       1.007 0.1313 224    1   0.055  1.0000
 Ref Tall fescue / LB Tall fescue     1.016 0.1410 224    1   0.112  1.0000
 Ref Tall fescue / SB Tall fescue     0.922 0.1183 224    1  -0.630  1.0000
 Ref Tall fescue / SS Tall fescue     0.781 0.1024 224    1  -1.884  0.7680
 LB Tall fescue / SB Tall fescue      0.908 0.1223 224    1  -0.716  0.9999
 LB Tall fescue / SS Tall fescue      0.769 0.1000 224    1  -2.020  0.6791
 SB Tall fescue / SS Tall fescue      0.847 0.1092 224    1  -1.289  0.9798

jaar = 2022:
 contrast                             ratio     SE  df null t.ratio p.value
 Ref Fodder radish / LB Fodder radish 0.911 0.1178 224    1  -0.719  0.9999
 Ref Fodder radish / SB Fodder radish 1.009 0.1288 224    1   0.071  1.0000
 Ref Fodder radish / SS Fodder radish 1.500 0.1964 224    1   3.095  0.0900
 Ref Fodder radish / Ref Black oats   1.081 0.1409 224    1   0.595  1.0000
 Ref Fodder radish / LB Black oats    1.117 0.1483 224    1   0.837  0.9995
 Ref Fodder radish / SB Black oats    1.050 0.1388 224    1   0.366  1.0000
 Ref Fodder radish / SS Black oats    0.947 0.1259 224    1  -0.412  1.0000
 Ref Fodder radish / Ref Tall fescue  1.221 0.1637 224    1   1.488  0.9426
 Ref Fodder radish / LB Tall fescue   1.240 0.1592 224    1   1.675  0.8777
 Ref Fodder radish / SB Tall fescue   1.126 0.1474 224    1   0.906  0.9990
 Ref Fodder radish / SS Tall fescue   0.954 0.1222 224    1  -0.372  1.0000
 LB Fodder radish / SB Fodder radish  1.107 0.1431 224    1   0.789  0.9997
 LB Fodder radish / SS Fodder radish  1.646 0.2106 224    1   3.892  0.0071
 LB Fodder radish / Ref Black oats    1.186 0.1516 224    1   1.333  0.9738
 LB Fodder radish / LB Black oats     1.226 0.1578 224    1   1.585  0.9131
 LB Fodder radish / SB Black oats     1.152 0.1480 224    1   1.100  0.9945
 LB Fodder radish / SS Black oats     1.039 0.1338 224    1   0.296  1.0000
 LB Fodder radish / Ref Tall fescue   1.340 0.1733 224    1   2.260  0.5085
 LB Fodder radish / LB Tall fescue    1.361 0.1796 224    1   2.332  0.4570
 LB Fodder radish / SB Tall fescue    1.236 0.1581 224    1   1.652  0.8872
 LB Fodder radish / SS Tall fescue    1.046 0.1339 224    1   0.354  1.0000
 SB Fodder radish / SS Fodder radish  1.486 0.1946 224    1   3.026  0.1081
 SB Fodder radish / Ref Black oats    1.071 0.1396 224    1   0.525  1.0000
 SB Fodder radish / LB Black oats     1.107 0.1470 224    1   0.768  0.9998
 SB Fodder radish / SB Black oats     1.040 0.1376 224    1   0.297  1.0000
 SB Fodder radish / SS Black oats     0.938 0.1248 224    1  -0.480  1.0000
 SB Fodder radish / Ref Tall fescue   1.210 0.1622 224    1   1.420  0.9586
 SB Fodder radish / LB Tall fescue    1.229 0.1578 224    1   1.604  0.9060
 SB Fodder radish / SB Tall fescue    1.116 0.1461 224    1   0.836  0.9995
 SB Fodder radish / SS Tall fescue    0.945 0.1211 224    1  -0.443  1.0000
 SS Fodder radish / Ref Black oats    0.721 0.0920 224    1  -2.566  0.3054
 SS Fodder radish / LB Black oats     0.745 0.0953 224    1  -2.301  0.4793
 SS Fodder radish / SB Black oats     0.700 0.0894 224    1  -2.793  0.1904
 SS Fodder radish / SS Black oats     0.631 0.0808 224    1  -3.596  0.0200
 SS Fodder radish / Ref Tall fescue   0.814 0.1044 224    1  -1.605  0.9056
 SS Fodder radish / LB Tall fescue    0.827 0.1113 224    1  -1.413  0.9600
 SS Fodder radish / SB Tall fescue    0.751 0.0958 224    1  -2.245  0.5188
 SS Fodder radish / SS Tall fescue    0.636 0.0820 224    1  -3.512  0.0262
 Ref Black oats / LB Black oats       1.034 0.1324 224    1   0.262  1.0000
 Ref Black oats / SB Black oats       0.971 0.1243 224    1  -0.228  1.0000
 Ref Black oats / SS Black oats       0.876 0.1123 224    1  -1.033  0.9968
 Ref Black oats / Ref Tall fescue     1.130 0.1451 224    1   0.948  0.9985
 Ref Black oats / LB Tall fescue      1.147 0.1535 224    1   1.028  0.9969
 Ref Black oats / SB Tall fescue      1.042 0.1330 224    1   0.321  1.0000
 Ref Black oats / SS Tall fescue      0.882 0.1135 224    1  -0.973  0.9981
 LB Black oats / SB Black oats        0.939 0.1199 224    1  -0.491  1.0000
 LB Black oats / SS Black oats        0.847 0.1082 224    1  -1.299  0.9786
 LB Black oats / Ref Tall fescue      1.092 0.1396 224    1   0.692  0.9999
 LB Black oats / LB Tall fescue       1.110 0.1521 224    1   0.758  0.9998
 LB Black oats / SB Tall fescue       1.008 0.1288 224    1   0.059  1.0000
 LB Black oats / SS Tall fescue       0.853 0.1111 224    1  -1.219  0.9870
 SB Black oats / SS Black oats        0.902 0.1152 224    1  -0.808  0.9997
 SB Black oats / Ref Tall fescue      1.163 0.1487 224    1   1.182  0.9899
 SB Black oats / LB Tall fescue       1.181 0.1612 224    1   1.221  0.9868
 SB Black oats / SB Tall fescue       1.073 0.1371 224    1   0.549  1.0000
 SB Black oats / SS Tall fescue       0.908 0.1179 224    1  -0.740  0.9999
 SS Black oats / Ref Tall fescue      1.289 0.1647 224    1   1.990  0.6996
 SS Black oats / LB Tall fescue       1.310 0.1800 224    1   1.963  0.7178
 SS Black oats / SB Tall fescue       1.189 0.1521 224    1   1.355  0.9705
 SS Black oats / SS Tall fescue       1.007 0.1313 224    1   0.055  1.0000
 Ref Tall fescue / LB Tall fescue     1.016 0.1410 224    1   0.112  1.0000
 Ref Tall fescue / SB Tall fescue     0.922 0.1183 224    1  -0.630  1.0000
 Ref Tall fescue / SS Tall fescue     0.781 0.1024 224    1  -1.884  0.7680
 LB Tall fescue / SB Tall fescue      0.908 0.1223 224    1  -0.716  0.9999
 LB Tall fescue / SS Tall fescue      0.769 0.1000 224    1  -2.020  0.6791
 SB Tall fescue / SS Tall fescue      0.847 0.1092 224    1  -1.289  0.9798

jaar = 2023:
 contrast                             ratio     SE  df null t.ratio p.value
 Ref Fodder radish / LB Fodder radish 0.911 0.1178 224    1  -0.719  0.9999
 Ref Fodder radish / SB Fodder radish 1.009 0.1288 224    1   0.071  1.0000
 Ref Fodder radish / SS Fodder radish 1.500 0.1964 224    1   3.095  0.0900
 Ref Fodder radish / Ref Black oats   1.081 0.1409 224    1   0.595  1.0000
 Ref Fodder radish / LB Black oats    1.117 0.1483 224    1   0.837  0.9995
 Ref Fodder radish / SB Black oats    1.050 0.1388 224    1   0.366  1.0000
 Ref Fodder radish / SS Black oats    0.947 0.1259 224    1  -0.412  1.0000
 Ref Fodder radish / Ref Tall fescue  1.221 0.1637 224    1   1.488  0.9426
 Ref Fodder radish / LB Tall fescue   1.240 0.1592 224    1   1.675  0.8777
 Ref Fodder radish / SB Tall fescue   1.126 0.1474 224    1   0.906  0.9990
 Ref Fodder radish / SS Tall fescue   0.954 0.1222 224    1  -0.372  1.0000
 LB Fodder radish / SB Fodder radish  1.107 0.1431 224    1   0.789  0.9997
 LB Fodder radish / SS Fodder radish  1.646 0.2106 224    1   3.892  0.0071
 LB Fodder radish / Ref Black oats    1.186 0.1516 224    1   1.333  0.9738
 LB Fodder radish / LB Black oats     1.226 0.1578 224    1   1.585  0.9131
 LB Fodder radish / SB Black oats     1.152 0.1480 224    1   1.100  0.9945
 LB Fodder radish / SS Black oats     1.039 0.1338 224    1   0.296  1.0000
 LB Fodder radish / Ref Tall fescue   1.340 0.1733 224    1   2.260  0.5085
 LB Fodder radish / LB Tall fescue    1.361 0.1796 224    1   2.332  0.4570
 LB Fodder radish / SB Tall fescue    1.236 0.1581 224    1   1.652  0.8872
 LB Fodder radish / SS Tall fescue    1.046 0.1339 224    1   0.354  1.0000
 SB Fodder radish / SS Fodder radish  1.486 0.1946 224    1   3.026  0.1081
 SB Fodder radish / Ref Black oats    1.071 0.1396 224    1   0.525  1.0000
 SB Fodder radish / LB Black oats     1.107 0.1470 224    1   0.768  0.9998
 SB Fodder radish / SB Black oats     1.040 0.1376 224    1   0.297  1.0000
 SB Fodder radish / SS Black oats     0.938 0.1248 224    1  -0.480  1.0000
 SB Fodder radish / Ref Tall fescue   1.210 0.1622 224    1   1.420  0.9586
 SB Fodder radish / LB Tall fescue    1.229 0.1578 224    1   1.604  0.9060
 SB Fodder radish / SB Tall fescue    1.116 0.1461 224    1   0.836  0.9995
 SB Fodder radish / SS Tall fescue    0.945 0.1211 224    1  -0.443  1.0000
 SS Fodder radish / Ref Black oats    0.721 0.0920 224    1  -2.566  0.3054
 SS Fodder radish / LB Black oats     0.745 0.0953 224    1  -2.301  0.4793
 SS Fodder radish / SB Black oats     0.700 0.0894 224    1  -2.793  0.1904
 SS Fodder radish / SS Black oats     0.631 0.0808 224    1  -3.596  0.0200
 SS Fodder radish / Ref Tall fescue   0.814 0.1044 224    1  -1.605  0.9056
 SS Fodder radish / LB Tall fescue    0.827 0.1113 224    1  -1.413  0.9600
 SS Fodder radish / SB Tall fescue    0.751 0.0958 224    1  -2.245  0.5188
 SS Fodder radish / SS Tall fescue    0.636 0.0820 224    1  -3.512  0.0262
 Ref Black oats / LB Black oats       1.034 0.1324 224    1   0.262  1.0000
 Ref Black oats / SB Black oats       0.971 0.1243 224    1  -0.228  1.0000
 Ref Black oats / SS Black oats       0.876 0.1123 224    1  -1.033  0.9968
 Ref Black oats / Ref Tall fescue     1.130 0.1451 224    1   0.948  0.9985
 Ref Black oats / LB Tall fescue      1.147 0.1535 224    1   1.028  0.9969
 Ref Black oats / SB Tall fescue      1.042 0.1330 224    1   0.321  1.0000
 Ref Black oats / SS Tall fescue      0.882 0.1135 224    1  -0.973  0.9981
 LB Black oats / SB Black oats        0.939 0.1199 224    1  -0.491  1.0000
 LB Black oats / SS Black oats        0.847 0.1082 224    1  -1.299  0.9786
 LB Black oats / Ref Tall fescue      1.092 0.1396 224    1   0.692  0.9999
 LB Black oats / LB Tall fescue       1.110 0.1521 224    1   0.758  0.9998
 LB Black oats / SB Tall fescue       1.008 0.1288 224    1   0.059  1.0000
 LB Black oats / SS Tall fescue       0.853 0.1111 224    1  -1.219  0.9870
 SB Black oats / SS Black oats        0.902 0.1152 224    1  -0.808  0.9997
 SB Black oats / Ref Tall fescue      1.163 0.1487 224    1   1.182  0.9899
 SB Black oats / LB Tall fescue       1.181 0.1612 224    1   1.221  0.9868
 SB Black oats / SB Tall fescue       1.073 0.1371 224    1   0.549  1.0000
 SB Black oats / SS Tall fescue       0.908 0.1179 224    1  -0.740  0.9999
 SS Black oats / Ref Tall fescue      1.289 0.1647 224    1   1.990  0.6996
 SS Black oats / LB Tall fescue       1.310 0.1800 224    1   1.963  0.7178
 SS Black oats / SB Tall fescue       1.189 0.1521 224    1   1.355  0.9705
 SS Black oats / SS Tall fescue       1.007 0.1313 224    1   0.055  1.0000
 Ref Tall fescue / LB Tall fescue     1.016 0.1410 224    1   0.112  1.0000
 Ref Tall fescue / SB Tall fescue     0.922 0.1183 224    1  -0.630  1.0000
 Ref Tall fescue / SS Tall fescue     0.781 0.1024 224    1  -1.884  0.7680
 LB Tall fescue / SB Tall fescue      0.908 0.1223 224    1  -0.716  0.9999
 LB Tall fescue / SS Tall fescue      0.769 0.1000 224    1  -2.020  0.6791
 SB Tall fescue / SS Tall fescue      0.847 0.1092 224    1  -1.289  0.9798

P value adjustment: tukey method for comparing a family of 12 estimates 
Tests are performed on the log scale 

Extra fields

                
                 2021 2022 2023
  Ref               0    6    4
  Compost           4    6    4
  LB                0    0    0
  LB extensive      4    6    4
  LB Sand           4    6    4
  SB                0    0    0
  SS                0    0    0
  SS Caterpillar    0    9    6