Underpinning Terroir with Data: Integrating Vineyard Performance Metrics with Soil and Climate Data to Better Understand Within-Region Variation in Marlborough, New Zealand

Table 4

Analysis of differences between yield-harvest date zones when based on raw vineyard data for yield (kg/m) and harvest date (day; Julian numbers) from locations corresponding to the clusters identified in Figure 4(e)^A.

Cluster^B

2014

2015

2016

2017

2018

2019

n

Yield

Day

n

Yield

Day

n

Yield

Day

n

Yield

Day

n

Yield

Day

n

Yield

Day

89

3.67d

98.9q

134

2.76bc

94.4pq

142

3.43d

100.1q

159

3.03d

102.1qr

158

3.14d

89.4r

168

3.09c

90.0q

88

3.82cd

104.9p

124

2.74bc

95.9p

125

3.80c

107.1p

131

3.48c

108.6p

130

3.77b

95.7p

129

3.65b

96.3p

56

4.27bc

94.4rs

103

2.62c

92.2q

113

4.46b

100.6q

107

3.96b

103.4q

112

3.36cd

91.9q

119

3.19c

85.9r

172

4.39b

91.3s

202

2.88b

85.4r

208

4.30b

94.9r

226

3.55c

92.6s

220

3.50bc

81.5s

221

3.12c

80.1s

73

5.31a

97.5qr

97

3.73a

94.5pq

94

5.05a

104.5p

105

4.70a

100.7r

152

4.64a

90.8qr

116

4.25a

87.2r

^AFor any individual year, yields and Julian days marked with different letters are significantly different ( < 0.05). n denotes the number of data values in each cluster. ^BThe colour coding of cluster numbers matches that in the source figures.