This experiment began in 1956 at a cold temperate boreal site. The location is an arable farm field, several hundred years under cultivation. The soil at the site is described as a Medudalf.
The rotations and treatments in the experiment are as follows:
Field 1: 9 year rotation since 1965 - alfalfa, alfalfa, w.wheat, w.wheat, s.barley, potato., w.wheat, w.wheat, s.barley. Fields 2, 3 & 4 (and 1 to 5 until 1964): 9 yr rotation - alfalfa, alfalfa, w.wheat, s.beet, s.barley, potato, w.wheat, s.beet, s.barley. Field 5 (since 1965): 2 yr rotation - spring wheat, sugar beet: Treatments for all fields various combinations of nil inputs, inorganic fertilizer only, straw incorporation, farmyard manure, dungwater+straw, pig slurry, cattle slurry, cattle slurry+straw, compost, poultry slurry.
The measurements made, frequency, and methodology are listed below:
a) Vegetation measurements made and frequency
Yield: yearly Total above-ground dry matter: yearly Total dry matter offtake: yearly Nitrogen content of offtake: yearly P, K, Ca, Mg - content of offtake; yearly
b) Soil sampling
Note: there are several archive samples from 70th and 80th and block 5 (2 year crop rotation) Details of soil sampling method: Spade, 0-22 cm, 4-8 cores from each plot. The cores are mixed. Details of measuring depths and soil layers: Note: There are a few occasional samplings into layers up to 100cm, separation 0-20, 20-60 and 60-100 cm.
c) Soil measurements made and frequency
Total carbon: yearly Method of measuring total carbon: Wet combustion with potassium bichromate; since 1995 LECO analyser Biomass carbon: since 1994 Method of measuring biomass carbon: Fumigation - extraction method Carbon measurements in other organic matter fractions: since 1994 Method of measuring carbon in other organic matter fractions: Hot water soluble carbon Carbon dioxide evolution: block B, twice per year Method of measuring carbon dioxide evolution: disturbed soil samples, laboratory measurements Total nitrogen: yearly Method of measuring total nitrogen: Kjehldal method; since 1995 LECO analyser Total mineral nitrogen: block 5, twice per year Nitrate nitrogen: block 5, twice per year Method of measuring nitrate nitrogen: Ion selective electrode; before 1985 colorimetrically (fenol sulphuric acid) Ammonium nitrogen: block 5, twice per year Method of measuring ammonium nitrogen: Ion selective electrode; distilation Soil bulk density or weight: occasionally Method of measuring soil bulk density or weight: 100 cm3 cylinders Other nutrients: Available P - Enger; K - Schachtschabel; Ca - Mehlich, Schachtschabel; Mg, Schachtschabel Atmospheric inputs: Wet N deposition (NO3 & NH4) is measured in Ruzyne. Data obtained at abaout 100 sites in the Czech Republic are available
d) Details of the meteorological station
Nearest meteorological station to the site: Airport Ruzyne which is 2.5 km from the site at coordinates 50.05 North, 14.20 East The meteorological station is automatic.
e) Meteorological data available and frequency
Rainfall: daily Air temperature: daily Wind speed: daily Net Radiation: daily Sun hours: daily Relative humidity: daily
This information was compiled for the GCTE-SOMNET Database, Pete Smith, Pete Falloon, David Powlson, and Jo Smith. Soil Science Department, IACR-Rothamsted, UK.
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Width of smallest plot is 12 m Length of smallest plot is 12 m Slope: Maximum 1% . Shape: Uniform Details of direction of cultivation: Parallel to long axis Width of Bare Strip around plot: 0 Width of Discard Strip around plot: 2 metres
b) Details of replication, randomization and controls
There are at least 4 replicates in the experiment. The experiment has a restricted randomized plot design. Control plots: without industrial and organic fertilizers, with industrial fertilizers only, with organic fertilizers only.
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Klir, J. (1994) Ucinnost dusiku z hnojiv a jeho bilance z osevnim postupu s leguminozami. (In Czech).
Klir, J. (1995) Long term field experiment, Praha-Ruzyne, Czech Republic. In: Evaluation of Soil Organic Matter Models Using Existing Long-Term Datasets. (eds: D.S. Powlson, P. Smith & J.U. Smith), NATO ASI Series I, Vol. 38, Springer-Verlag, Heidelberg: 363-368.
Klir, J., Kubat, J. & Pova, D. (1995) Stickstoffbilanzen der Daurfeldversuche in Prag. Mitteilungen der Deutschen Bodenkundlichen Gesellschaft, 76: 831-834.
Klir, J., Skarda, M., Markova, J., & Vojtiskova, I. (1992) Effect of organic fertilizing on the nutrients balances in long-term field experiment in Praha-Ruzyne. In: Proceedings of Symposium "Long-term field experiments and nutrient dynamics", Bad Lauchstadt, 1992, Germany
Kubat, J., Lipavsky, J. & Klir, J. (1993) Carbon and nitrogen balance in arable soils as affected by long-term manuring and fertilization. In: Proceedings of Rothamsted 150th Anniversary Conference, Harpenden, U.K., pp101.