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Keszthely - Hungarian long-term fertilizer experimental network - LTSE

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Subnetworks: 
Hungarian long-term fertilizer experimental network
Location:
Hungary
Latitude: 46.766667
Longitude: 17.233333
Background
Continent: 
Europe
Year LTSE Began: 
1966
Comments: 
Native ecosystem: forest. Previous crops: wheat, barley, maize (sunflower), pea, (wheat). Site geology: alluvium+loess. Land use: Rotation 1 - wheat,maize,maize,pea. Rotation 2 - wheat,maize,maize,wheat. Treatments: NPK fertilizers (20-40 treatments). solid - a) Soil description Apl 0-22cm: reddish-brown loam with polyhedric crumb structure, very compact, non-calcareous. BC 22-40 cm: reddish-brown compact loam, calcareous. C1 40-65 cm: yellowish light brown sandy loess with slight lime precipitation, strongly calcareous. C2 65-135 cm: yellow sandy loess with lime concretions and ferric spots, strongly calcareous. b) Soil properties * Approximate soil organic matter content: 1.7% * Approximate carbon:nitrogen ratio: 10 * Approximate soil bulk density: 1.46 g/cm3 * Approximate ground water level: 300 cm * Percent clay (i.e. particles less than 2 um): 26% * Percent silt (i.e. particles between 2 um and 20 um): 19% * Percent sand (i.e. particles greater than 20 um): 55% * Approximate soil pH: 5.9 * Approximate minimum soil pH: 5.9 * Approximate maximum soil pH: 5.9 * Method of determining soil pH: 1% KCl soil solution ratio 1:2.5 glass electrode. b) Soil sampling * Time zero soil measurements taken. Samples from the genetic layers, at least 4 profiles: pH (H2O), pH (KCl), CaCO3%, hydrolitic acidity, plasticity index according to Arany, hygroscopy at 35.2% relative humidity, lifting of capillary water in 5 and 20 hrs, humus%, total N%, calcium lactate soluble P2O5, ammonium lactate soluble K2O, (exchangeable Ca & Mg). Sampling after the harvest of previous crops, samples were not stored. * Details of soil sampling method: Sampling after the harvest of previous crops, at least 10 auger samples (approx 1 kg) unified, air dried, sieved 2mm, point samples are taken from the net plot. c) Soil measurements made and frequency * Total carbon: Annually (plots in last year of rotation only) * Method of measuring total carbon: C measurement with bichromate method according to Tyurin. Humus% = C%x1.724 * Total nitrogen: Annually (plots in last year of rotation only) * Method of measuring total nitrogen: Kjeldahl method after H2SO4 digestion. * Total mineral nitrogen: Annually (plots in last year of rotation only) * Method of measuring total mineral nitrogen: 1% KCl solution, soil solution ratiio 1:2.5 after reduction measurement with Kjeldahl method. * Soil bulk density or weight: Once or twice during experiment * Method of measuring soil bulk density or weight: Special sampling cylinder (200 cu cm) dried at 105 deg C. * Other nutrients: Soluble P, K, Mg, Na, Zn, Cu, Mn, SO4--. water - Approximate ground water level: 300 cm
Environment
Annual Precipitation (mm): 
400-800
Dominant plant species (latin genus and species): 
Previous crops: wheat, barley, maize (sunflower), pea, (wheat).
Landuse: 
Arable
Ecoregion: 
Cool Temperate
Slope (%): 
0-2%
Geological material: 
Site geology: alluvium+loess.
Experimental Design
Design (short description): 
a) Details of the plots Width of smallest plot is 10 m Length of smallest plot is 6 m Slope: <1% * Details of direction of cultivation: Changed yearly Width of Bare Strip around plot: 1-1.5 m Width of Discard Strip around plot: 0.5-0.7 m b) Details of replication, randomization and controls There are at least 4 replicates in the experiment. The experiment has a restricted randomized plot design. Split-plot, incomplete block. There are control plots described as follows: * Unfertilized control cultivated and planted as the treated plots. Deletion of data which differ from the average by more than 3 SDs, and replacement with treatment average over blocks. Original data are also available.
Permanent plot area (square meters): 
1000-3000
Soil Classification
soilorder: 
Inceptisol
Soil taxa (ex, Great Group of Soil Taxonomy): 
Eutrochrept (USDA)
Soil/Data Archive
Sample frequency: 
Never
Soil Solid Data
pH and acidity: 
Yes
Organic Carbon: 
Yes
Nitrogen: 
Yes
Other macronutrients: 
Yes
Bulk Density: 
Yes
Mineralogy: 
Yes