Overview

Grond

##                
##                 LB Ref SB SS
##   Fibrous roots  2   2  2  2
##   Mixture        2   2  2  2
##   Taproots       2   2  2  2
## Warning: Removed 12 rows containing non-finite values (`stat_boxplot()`).
## Warning: Removed 12 rows containing non-finite values (`stat_summary()`).
## Warning: Removed 12 rows containing non-finite values (`stat_bin()`).

## 
##  studentized Breusch-Pagan test
## 
## data:  md
## BP = 7.3804, df = 5, p-value = 0.1939
## 
## Call:
## lm(formula = ntotaal ~ treatment + blok, data = totaal)
## 
## Coefficients:
##       (Intercept)   treatmentMixture  treatmentTaproots              blok2  
##            248.02              46.36              67.64              26.82  
##             blok3              blok4  
##             26.83              21.74
## Analysis of Variance Table
## 
## Response: ntotaal
##           Df  Sum Sq Mean Sq F value    Pr(>F)    
## treatment  2 19138.8  9569.4 24.9493 6.467e-06 ***
## blok       3  2945.6   981.9  2.5599   0.08716 .  
## Residuals 18  6904.0   383.6                      
## ---
## Signif. codes:  0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1

## 
##  Shapiro-Wilk normality test
## 
## data:  resid(md)
## W = 0.97607, p-value = 0.8139
## $emmeans
##  treatment     emmean   SE df lower.CL upper.CL
##  Fibrous roots    267 6.92 18      252      281
##  Mixture          313 6.92 18      299      328
##  Taproots         335 6.92 18      320      349
## 
## Results are averaged over the levels of: blok 
## Confidence level used: 0.95 
## 
## $contrasts
##  contrast                 estimate   SE df t.ratio p.value
##  Fibrous roots - Mixture     -46.4 9.79 18  -4.735  0.0005
##  Fibrous roots - Taproots    -67.6 9.79 18  -6.907  <.0001
##  Mixture - Taproots          -21.3 9.79 18  -2.173  0.1033
## 
## Results are averaged over the levels of: blok 
## P value adjustment: tukey method for comparing a family of 3 estimates

Totaal

##                
##                 LB Ref SB SS
##   Fibrous roots  3   3  3  3
##   Mixture        3   3  3  3
##   Taproots       3   3  3  3
## Warning: Removed 12 rows containing non-finite values (`stat_boxplot()`).
## Warning: Removed 12 rows containing non-finite values (`stat_summary()`).
## Warning: Removed 12 rows containing non-finite values (`stat_bin()`).

## 
##  studentized Breusch-Pagan test
## 
## data:  md
## BP = 7.3804, df = 5, p-value = 0.1939
## 
## Call:
## lm(formula = ntotaal ~ treatment + blok, data = totaal)
## 
## Coefficients:
##       (Intercept)   treatmentMixture  treatmentTaproots              blok2  
##            248.02              46.36              67.64              26.82  
##             blok3              blok4  
##             26.83              21.74
## Analysis of Variance Table
## 
## Response: ntotaal
##           Df  Sum Sq Mean Sq F value    Pr(>F)    
## treatment  2 19138.8  9569.4 24.9493 6.467e-06 ***
## blok       3  2945.6   981.9  2.5599   0.08716 .  
## Residuals 18  6904.0   383.6                      
## ---
## Signif. codes:  0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1

## 
##  Shapiro-Wilk normality test
## 
## data:  resid(md)
## W = 0.97607, p-value = 0.8139
## $emmeans
##  treatment     emmean   SE df lower.CL upper.CL
##  Fibrous roots    267 6.92 18      252      281
##  Mixture          313 6.92 18      299      328
##  Taproots         335 6.92 18      320      349
## 
## Results are averaged over the levels of: blok 
## Confidence level used: 0.95 
## 
## $contrasts
##  contrast                 estimate   SE df t.ratio p.value
##  Fibrous roots - Mixture     -46.4 9.79 18  -4.735  0.0005
##  Fibrous roots - Taproots    -67.6 9.79 18  -6.907  <.0001
##  Mixture - Taproots          -21.3 9.79 18  -2.173  0.1033
## 
## Results are averaged over the levels of: blok 
## P value adjustment: tukey method for comparing a family of 3 estimates

Knol

##                
##                 LB Ref SB SS
##   Fibrous roots  3   3  3  3
##   Mixture        3   3  3  3
##   Taproots       3   3  3  3
## Warning: Removed 12 rows containing non-finite values (`stat_boxplot()`).
## Warning: Removed 12 rows containing non-finite values (`stat_summary()`).
## Warning: Removed 12 rows containing non-finite values (`stat_bin()`).

## 
##  studentized Breusch-Pagan test
## 
## data:  md
## BP = 8.5246, df = 5, p-value = 0.1296
## 
## Call:
## lm(formula = n_inhoud ~ treatment + blok, data = knol)
## 
## Coefficients:
##       (Intercept)   treatmentMixture  treatmentTaproots              blok2  
##           153.380             21.812             23.033              7.207  
##             blok3              blok4  
##            17.450             16.144
## Analysis of Variance Table
## 
## Response: n_inhoud
##           Df Sum Sq Mean Sq F value   Pr(>F)    
## treatment  2 2687.3 1343.66 15.9345 0.000104 ***
## blok       3 1205.3  401.77  4.7647 0.012901 *  
## Residuals 18 1517.8   84.32                     
## ---
## Signif. codes:  0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1

## 
##  Shapiro-Wilk normality test
## 
## data:  resid(md)
## W = 0.96929, p-value = 0.6495
## $emmeans
##  treatment     emmean   SE df lower.CL upper.CL
##  Fibrous roots    164 3.25 18      157      170
##  Mixture          185 3.25 18      179      192
##  Taproots         187 3.25 18      180      193
## 
## Results are averaged over the levels of: blok 
## Confidence level used: 0.95 
## 
## $contrasts
##  contrast                 estimate   SE df t.ratio p.value
##  Fibrous roots - Mixture    -21.81 4.59 18  -4.751  0.0004
##  Fibrous roots - Taproots   -23.03 4.59 18  -5.016  0.0003
##  Mixture - Taproots          -1.22 4.59 18  -0.266  0.9619
## 
## Results are averaged over the levels of: blok 
## P value adjustment: tukey method for comparing a family of 3 estimates

Stoloon

##                
##                 LB Ref SB SS
##   Fibrous roots  3   3  3  3
##   Mixture        3   3  3  3
##   Taproots       3   3  3  3
## Warning: Removed 12 rows containing non-finite values (`stat_boxplot()`).
## Warning: Removed 12 rows containing non-finite values (`stat_summary()`).
## Warning: Removed 12 rows containing non-finite values (`stat_bin()`).

## 
##  studentized Breusch-Pagan test
## 
## data:  md
## BP = 10.175, df = 5, p-value = 0.07042
## 
## Call:
## lm(formula = n_inhoud ~ treatment + blok, data = stoloon)
## 
## Coefficients:
##       (Intercept)   treatmentMixture  treatmentTaproots              blok2  
##            1.8656             0.2586             0.4346             0.4079  
##             blok3              blok4  
##            0.2454             0.4181
## Analysis of Variance Table
## 
## Response: n_inhoud
##           Df  Sum Sq Mean Sq F value    Pr(>F)    
## treatment  2 0.76470 0.38235 12.1481 0.0004579 ***
## blok       3 0.68659 0.22886  7.2714 0.0021402 ** 
## Residuals 18 0.56654 0.03147                      
## ---
## Signif. codes:  0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1

## 
##  Shapiro-Wilk normality test
## 
## data:  resid(md)
## W = 0.96406, p-value = 0.5252
## $emmeans
##  treatment     emmean     SE df lower.CL upper.CL
##  Fibrous roots   2.13 0.0627 18     2.00     2.27
##  Mixture         2.39 0.0627 18     2.26     2.52
##  Taproots        2.57 0.0627 18     2.44     2.70
## 
## Results are averaged over the levels of: blok 
## Confidence level used: 0.95 
## 
## $contrasts
##  contrast                 estimate     SE df t.ratio p.value
##  Fibrous roots - Mixture    -0.259 0.0887 18  -2.916  0.0239
##  Fibrous roots - Taproots   -0.435 0.0887 18  -4.900  0.0003
##  Mixture - Taproots         -0.176 0.0887 18  -1.984  0.1449
## 
## Results are averaged over the levels of: blok 
## P value adjustment: tukey method for comparing a family of 3 estimates

Loof

##                
##                 LB Ref SB SS
##   Fibrous roots  3   3  3  3
##   Mixture        3   3  3  3
##   Taproots       3   3  3  3
## Warning: Removed 12 rows containing non-finite values (`stat_boxplot()`).
## Warning: Removed 12 rows containing non-finite values (`stat_summary()`).
## Warning: Removed 12 rows containing non-finite values (`stat_bin()`).

## 
##  studentized Breusch-Pagan test
## 
## data:  md
## BP = 9.3271, df = 5, p-value = 0.09671
## 
## Call:
## lm(formula = n_inhoud ~ treatment + blok, data = loof)
## 
## Coefficients:
##       (Intercept)   treatmentMixture  treatmentTaproots              blok2  
##            47.196             14.792              5.421             11.204  
##             blok3              blok4  
##             8.472              6.179
## Analysis of Variance Table
## 
## Response: n_inhoud
##           Df  Sum Sq Mean Sq F value  Pr(>F)  
## treatment  2  896.02  448.01  3.7707 0.04288 *
## blok       3  410.20  136.73  1.1508 0.35567  
## Residuals 18 2138.66  118.81                  
## ---
## Signif. codes:  0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1

## 
##  Shapiro-Wilk normality test
## 
## data:  resid(md)
## W = 0.92983, p-value = 0.09664
## $emmeans
##  treatment     emmean   SE df lower.CL upper.CL
##  Fibrous roots   53.7 3.85 18     45.6     61.8
##  Mixture         68.5 3.85 18     60.4     76.5
##  Taproots        59.1 3.85 18     51.0     67.2
## 
## Results are averaged over the levels of: blok 
## Confidence level used: 0.95 
## 
## $contrasts
##  contrast                 estimate   SE df t.ratio p.value
##  Fibrous roots - Mixture    -14.79 5.45 18  -2.714  0.0361
##  Fibrous roots - Taproots    -5.42 5.45 18  -0.995  0.5895
##  Mixture - Taproots           9.37 5.45 18   1.719  0.2253
## 
## Results are averaged over the levels of: blok 
## P value adjustment: tukey method for comparing a family of 3 estimates

Tabel

wortels_loof Mechanical treatment Cover crop treatment N in soil [kg/ha] N potato plant [kg/ha] Total N [kg/ha]
grond LB Fibrous roots 43 NaN NaN
grond LB Mixture 55 NaN NaN
grond LB Taproots 89 NaN NaN
grond Ref Fibrous roots 47 NaN NaN
grond Ref Mixture 59 NaN NaN
grond Ref Taproots 76 NaN NaN
grond SB Fibrous roots 51 NaN NaN
grond SB Mixture 58 NaN NaN
grond SB Taproots 100 NaN NaN
grond SS Fibrous roots 49 NaN NaN
grond SS Mixture 56 NaN NaN
grond SS Taproots 80 NaN NaN
grond,knol, stoloon, loof LB Fibrous roots NaN NaN 265.1014
grond,knol, stoloon, loof LB Mixture NaN NaN 314.9925
grond,knol, stoloon, loof LB Taproots NaN NaN 358.4809
grond,knol, stoloon, loof Ref Fibrous roots NaN NaN 270.0108
grond,knol, stoloon, loof Ref Mixture NaN NaN 325.2658
grond,knol, stoloon, loof Ref Taproots NaN NaN 328.0198
grond,knol, stoloon, loof SB Fibrous roots NaN NaN 263.8949
grond,knol, stoloon, loof SB Mixture NaN NaN 316.7427
grond,knol, stoloon, loof SB Taproots NaN NaN 357.8940
grond,knol, stoloon, loof SS Fibrous roots NaN NaN 268.4842
grond,knol, stoloon, loof SS Mixture NaN NaN 295.9398
grond,knol, stoloon, loof SS Taproots NaN NaN 293.6493
knol LB Fibrous roots NaN 166.243572 NaN
knol LB Mixture NaN 189.518355 NaN
knol LB Taproots NaN 201.571485 NaN
knol Ref Fibrous roots NaN 176.146569 NaN
knol Ref Mixture NaN 190.419348 NaN
knol Ref Taproots NaN 186.848041 NaN
knol SB Fibrous roots NaN 152.180439 NaN
knol SB Mixture NaN 184.387998 NaN
knol SB Taproots NaN 190.035788 NaN
knol SS Fibrous roots NaN 159.748568 NaN
knol SS Mixture NaN 177.240464 NaN
knol SS Taproots NaN 167.994238 NaN
loof LB Fibrous roots NaN 53.829734 NaN
loof LB Mixture NaN 68.087164 NaN
loof LB Taproots NaN 65.298064 NaN
loof Ref Fibrous roots NaN 44.319922 NaN
loof Ref Mixture NaN 73.517133 NaN
loof Ref Taproots NaN 62.501266 NaN
loof SB Fibrous roots NaN 58.671486 NaN
loof SB Mixture NaN 71.678194 NaN
loof SB Taproots NaN 65.063830 NaN
loof SS Fibrous roots NaN 57.817237 NaN
loof SS Mixture NaN 60.523817 NaN
loof SS Taproots NaN 43.458984 NaN
stoloon LB Fibrous roots NaN 2.028086 NaN
stoloon LB Mixture NaN 2.386983 NaN
stoloon LB Taproots NaN 2.611308 NaN
stoloon Ref Fibrous roots NaN 2.544339 NaN
stoloon Ref Mixture NaN 2.329349 NaN
stoloon Ref Taproots NaN 2.670506 NaN
stoloon SB Fibrous roots NaN 2.043001 NaN
stoloon SB Mixture NaN 2.676468 NaN
stoloon SB Taproots NaN 2.794394 NaN
stoloon SS Fibrous roots NaN 1.918378 NaN
stoloon SS Mixture NaN 2.175568 NaN
stoloon SS Taproots NaN 2.196093 NaN