Variable | Depth | Value (range) | Units | Ref year | Estimated? | Baseline? |
---|---|---|---|---|---|---|
soil organic carbon | 0 – 7.5 Centimetres | 2.7 | Percent | 1952 | ||
plant available phosphorous | 0 – 7.5 Centimetres | 7 | parts per million | 1952 | ||
soil pH | 6.1 (5.7 – 5.9) | 1952 |
Variable | Time period | Value (range) | Units |
---|---|---|---|
air temperature | 12 | degree Celsius | |
precipitation | 745 (419 – 949) | millimeter |
Crop | Years grown |
---|---|
rye grass | |
white clover |
Variable | Material | Units | Frequency | Scale | Comment |
---|---|---|---|---|---|
plant biomass | All crops | 1 | pasture production was measured using exclusion cages (3.25 x 0.61 m), with two cages per plot | ||
soil organic carbon | Soil | 1 | A composite soil sample of 10 cores (2.5 cm diameter) was collected from each plot to a depth of 7.5 cm. These were initially collected at 3-month intervals (July, October, January and April) but in the later years were collected either at 6-month intervals or annually (July) prior to fertiliser application (1948-1952) |
Crop | Years grown |
---|---|
rye grass | |
white clover |
Crop | Years grown |
---|---|
rye grass | |
white clover |
Variable | Material | Units | Frequency | Scale | Comment |
---|---|---|---|---|---|
soil total carbon | Soil | ||||
total soil nitrogen | Soil | ||||
total soil phosphorous | Soil | ||||
plant available phosphorous | Soil | ||||
potassium content | Soil | ||||
sulphur content | Soil | ||||
soil organic matter | Soil | ||||
cadmium | Soil | ||||
fluorine | Soil | ||||
earthworm | Soil | ||||
yield | All crops | monthly | Monthly mean dry matter yield for each treatment 1980-2019 and annual dry matter yield for each plot from 1994-2019 (n=494) | ||
botanical composition | All crops | annually | Seasonal or annual botanical composition and yield from 1952-2019 (n=3351) and from each plot and cut from 2005-2019 (n=2944) |