Soil quality 2015. Drystock and other pastoral sites

Source:
Auckland Council Research and Evaluation Unit, RIMU
Publication date:
2015
Topics:
Land useSoil

The data is collected by RIMU as part of the soil quality monitoring programme which includes over 160 sites across pastoral, horticultural, urban, plantation forestry and native bush sites for representative soil types of the Auckland region. Soil compaction, measured by macroporosity -10kPa, is the soil quality issue of most concern. Overly compact or pugged up soils have an increased risk of sediment loss to the receiving environment via surface runoff when it rains. This is because a compact soil is less able to drain and infiltrate water. Soil compaction also affects the agronomic potential of pasture.

Frequency: Five-yearly update

 

Site no

NZSC

pH

OC %

TN %

AMN*  mg/kg

Olsen P mg/kg

Bulk density g/cm³

Macro

 ­-10 kPa

2

Granular

6.13

6.89

0.64

172

34

0.81

9

18

Ultic

5.87

5.61

0.50

133

22

0.83

9

21

Brown

5.32

4.29

0.45

155

39

1.02

7

27

Ultic

6.06

8.13

0.77

218

40

0.70

10

30

Recent

5.97

3.45

0.33

134

52

0.98

5

46

Granular

5.59

8.40

0.77

163

89

0.91

8

48

Brown

5.51

4.47

0.37

105

20

1.04

9

50

Recent

5.82

3.53

0.33

79

17

1.27

10

51

Recent

5.55

3.71

0.32

73

18

1.02

19

61

Granular

5.69

6.08

0.55

186

12

0.88

6

63

Allophanic

5.83

8.36

0.76

130

20

0.76

7

69

Granular

5.84

6.54

0.64

157

12

0.80

12

74

Gley

5.62

6.82

0.64

191

29

0.67

9

76

Gley

5.72

4.87

0.46

116

70

0.91

6

78

Ultic

5.95

3.98

0.39

102

22

1.07

4

84

Granular

6.56

6.25

0.58

165

45

0.80

10

The red and blue bold numbers are values that are above recommended and below recommended guidelines, respectively.

*denotes anaerobic mineralisable nitrogen (AMN)

Frequency

Five-yearly

Availability

The data is collected by RIMU as part of the soil quality monitoring programme which includes over 160 sites across pastoral, horticultural, urban, plantation forestry and native bush sites for representative soil types of the Auckland region.

Note

These sixteen pastoral, predominately drystock, sites, were sampled in 2015 and it was the third time they were sampled. They were first sampled pre-2000 and repeated in 2010.

Relevance

Soil compaction, measured by macroporosity -10kPa, is the soil quality issue of most concern. Overly compact or pugged up soils have an increased risk of sediment loss to the receiving environment via surface runoff when it rains. This is because a compact soil is less able to drain and infiltrate water. Soil compaction also affects the agronomic potential of pasture.

Soil quality 2015. Drystock and other pastoral sites


Soil quality 2015 drystock

Soil quality 2015 drystock
Last updated: 2016-05-27

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