Lelystad Phosphate Trial

Objective
Long-term effects of phosphate management on crop yields, phosphate fractions in the soil, organic matter content of soil and phosphate leaching.
Description
Effects of different phosphate fertilization levels on crop yield, phosphate levels of phosphate soil fractions and risks of phosphate leaching. Levels of fertilization are monitored: 0, 70, 140 and 280 kg P2O5/ha. Since 2005, half of the fields are not fertilized any more. Measured soil phosphorus fractions are P-CaCl2, Pw, P-Al, P-ox and total P.
Data Access Statement
Don't know
Data license
Don't know
Data policy
Don't know
Organizations
Person
Janjo de Haan
Project leader & researcher Soil Water Fertilization

Site: Lelystad Phosphate Trial

Location
Lelystad
Netherlands
Geographic location
52.512878, 5.483435
© OpenStreetMap contributors
Visits permitted?
No
Soil description
Marine light clay soil

Design period: Current period from start of experiment in 1990 (1990—)

Description
Long-term effects of phosphate fertilization on crop yields, soil and leaching. Part of larger project with other long-term grassland and arable experiments. Four P-levels with yearly fertilization (TSP). Since 2005 plots split in two with one half no fertilization.
Crops
CropYears grown
potatoes
onions
vegetable crops
Factor
Factor name
Factor levels
phosphate fertilizer exposure
P0  (0 kgP/ha)
1990—
P70  (70 kgP/ha)
1990—
P140  (140 kgP/ha)
1990—
P280  (280 kgP/ha)
1990—
Measurements
VariableMaterialUnitsFrequencyScaleComment
YieldsNot specified
Soil phosphorous fractionsNot specifiedP-CaCl2, Pw, P-Al, P-ox and total P
Phosphate leachingNot specified

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