Nitrogen Availability and Uptake by Sugarbeet in Years Following a Manure Application
Table 2
The influence of treatment on the total cumulative biomass for 2007 sugarbeet plant components. Table gives values for treatment effects, and single-degree-of-freedom orthogonal comparisons derived from an analysis of variance.
Accumulated sugarbeet biomass
Source of variation
Tops
Roots
Whole plant
1 June
13 July
20 Aug
27 Sept
1 June
13 July
20 Aug
27 Sept
1 June
13 July
20 Aug
27 Sept
values
Treatment (TRT)
**
***
***
**
0.36
**
***
**
0.02
***
***
***
Orthogonal contrasts†
No manure versus manure
0.64
0.26
0.7
0.5
0.9
0.6
0.8
0.25
0.7
0.4
0.9
0.23
Man: m1 versus m3
**
**
***
0.06
**
0.07
***
0.13
**
*
***
*
Man: y1 versus y2 & y3
0.9
***
**
0.29
0.82
**
**
*
0.9
***
**
*
Man y2 & y3: m1 versus m3
**
**
***
*
**
*
***
*
**
**
***
**
†No manure: NEFert + control + Fert; Man: manure = m1 + m3 where m1: manure-1x; m3: manure-3x; y1, y2, y3: fall manure applied 1, 2, and 3 years in the past, respectively.
*
,**,***.
