Variable | Depth | Value (range) | Units | Ref year | Estimated? | Baseline? |
---|---|---|---|---|---|---|
sand content | 0 – 23 Centimetres | 25 | Percent | |||
silt content | 0 – 23 Centimetres | 50 | Percent | |||
clay content | 0 – 23 Centimetres | 25 (19 – 39) | Percent | |||
soil organic carbon | 0 – 23 Centimetres | 1 | Percent | 1843 | ||
total soil nitrogen | 0 – 23 Centimetres | 0.11 | Percent | 1843 | ||
plant available phosphorous (Olsen P) | 0 – 23 Centimetres | 10 | milligram per kilogram | 1843 | ||
soil bulk density | 0 – 23 Centimetres | 1.25 | gram per cubic centimetre | 1843 | ||
soil organic carbon | 0 – 23 Centimetres | 28.8 | tonnes per hectare |
Variable | Time period | Value (range) | Units |
---|---|---|---|
annual total precipitation | 1981 – 2010 | 733 (515 – 973) | mm |
annual mean air temperature | 1981 – 2010 | 9.8 | degree Celsius |
Crop | Years grown |
---|---|
winter wheat |
Variable | Material | Units | Frequency | Scale | Comment |
---|---|---|---|---|---|
yield components | winter wheat | t/ha | annually | Grain and straw yields at field moisture content. Actual dry matter not measured, assumed to be approximately 85% dry matter. | |
weight per bushel dressed corn | winter wheat | lb | annually | Bushel weights can be used to derive Hectolitre weights (HLWT),a measure of grain quality. | |
soil organic carbon | Soil | % | infrequently | Topsoil (0-23cm) from soil sampled in 1865, 1881, 1893 and 1914. | |
soil organic carbon | Soil | t/ha | infreqently | Topsoil (0-23cm) from soil sampled in 1865, 1881, 1893 and 1914. Calculated from % SOC and soil bulk density; adjusted for changes in bulk density in strips given FYM | |
soil total nitrogen | Soil | % | infrequently | Topsoil (0-23cm) from soil sampled in 1865, 1881, 1893 and 1914. | |
plant available phosphorous | Soil | mg/kg | infrequently | Sodium bicarbonate soluble P (Olsen P). Topsoil (0-23cm) from soil sampled in 1865, 1881, 1893 and 1914. | |
soil bulk density | Soil | g/cm3 | infrequently | A single mean value for all plots which do not receive FYM and estimated values for plots which receive FYM, based on measurements made in 1865, 1881, 1893 (Dyer, 1902), 1914 (unpublished) and 2000 (Watts et al, 2006). | |
harvest date | winter wheat | annually | Includes both cutting and carting date, ie dates crop cut and then removed from the field. |
Crop | Years grown |
---|---|
winter wheat | |
fallow |
Variable | Material | Units | Frequency | Scale | Comment |
---|---|---|---|---|---|
yield components | winter wheat | t/ha | annually | Grain and straw yields at field moisture content, approximately 85% dry matter. | |
weight per bushel dressed corn | winter wheat | lb | annually | Bushel weights can be used to derive hectolitre weights (HLWT), a measure of grain quality | |
soil organic carbon | Soil | % | infrequently | Topsoil (0-23cm) from soil sampled in 1936; 1944 and 1966. | |
total soil nitrogen | Soil | % | infrequently | Topsoil (0-23cm) from soil sampled in 1936; 1944 and 1966. | |
plant available phosphorous | Soil | mg/kg | infrequently | Sodium bicarbonate soluble P (Olsen P). Topsoil (0-23cm) from soil sampled in 1936, 1944 and 1966 | |
soil bulk density | Soil | g/cm3 | infrequently | A single mean value for all plots which do not receive FYM and estimated values for plots which receive FYM, based on measurements made in 1865, 1881, 1893 (Dyer, 1902), 1914 (unpublished) and 2000 (Watts et al, 2006). | |
soil organic carbon | Soil | t/ha | infrequently | Topsoil (0-23cm) from soil sampled in 1936, 1944 and 1966. Calculated from % SOC and soil bulk density; adjusted for changes in bulk density in strips given FYM | |
weed species richness | Not specified | Species occurence, selected plots and selected years for all sections (before herbicides were applied) | |||
harvest date | winter wheat | annually | Both cutting date and carting date (ie date crop removed from field) |
Crop | Years grown |
---|---|
winter wheat | 1968— |
oats | 1996— |
beans | 1968—1978 |
potatoes | 1968—1996 |
beans | 2018— |
fallow | |
maize | 1997—2017 |
Variable | Material | Units | Frequency | Scale | Comment |
---|---|---|---|---|---|
yield components | All crops | t/ha | annually | Grain and straw at 85% dry matter. | |
hectolitre grain weight | winter wheat | kilogram per hectolitre | annually | Since 1999 selected plots only | |
thousand grain weight | winter wheat | gram | annually | Since 1974 selected plots only | |
weed species richness | Not specified | annually | Section 8 only (no herbicides) | ||
soil organic carbon | Soil | percent | every five years from 1987 | Topsoil (0-23cm) | |
soil total nitrogen | Soil | percent | every five years from 1987 | Topsoil (0-23cm) | |
plant available phosphorous | Soil | mg/kg | every five years for 1987 | Topsoil (0-23cm) | |
soil bulk density | Soil | gram per cubic centimeter | A single mean value for all plots which do not receive FYM and estimated values for plots which receive FYM, based on measurements made in 1865, 1881, 1893 (Dyer, 1902), 1914 (unpublished) and 2000 (Watts et al, 2006). | ||
nutrient content | All crops | percent | annually | Selected plots since 1968 % N, P, K, Ca, Mg, Na and S. Grain and straw. | |
take-all disease incidence | winter wheat | annually | Selected plots since 1968. Also eyespot, sharp eyespot and brown foot rot. | ||
harvest date | All crops | annually | Sowing and harvest dates of all crops | ||
earthworm abundance | Not specified | occasional | Selected plots, occasional years. |