Table 3 The effect of nitrogen addition on sugar level (g L⁻¹), Total Acidity (g tartrate eq. L⁻¹), pH and malic acid content (g L⁻¹) in grape musts prior to harvest in 2013 and 2014

 Control

193 ^a

10.9 ^a

2.99 ^a

4.7 ^a

205 ^a

7.9 ^a

3.17 ^a

3.8 ^a

 Soil N100

174 ^a

11.7 ^a

3.01 ^a

6.0 ^a

190 ^b

7.6 ^a

3.20 ^a

3.8 ^a

 Control

204 ^a

10.8 ^a

3.08 ^a

5.1 ^a

205 ^a

9.0 ^a

3.05 ^a

4.6 ^a

 Soil N100

198 ^b

11.4 ^b

3.10 ^a

5.8 ^b

204 ^a

9.4 ^a

3.07 ^a

5.1 ^b