Thyrow Endurance Field Experiments: Static nutrient deficiency test

Local identifier
Thy_D4
Years operational
1937—
Objective
Influence of long-term differentiated organic and mineral fertilization on soil properties and yield performance of a sandy soil.
Description
When the experiment was carried out in 1937, the aim was to determine which changes occur in the soil and plant as a result of long-term failure to fertilize and limescale or what maximum yield increase can be achieved by organic-mineral full fertilization. Among other things, the results available over many years make it possible to make statements about the potential for nutrient replenishment and buffering, the yield potential and the carbon storage capacity of this sandy soil typical of the region. In 1949, the experiment was divided into two sections: Section 1 continues unchanged to this day (Thy_D41). On section 2 (Thy_D42) it was examined whether and how quickly the soil fertility on the former deficiency variants can be regenerated by reintroducing fertilization and liming. After that, there was a renewed lack of fertilization, but from 1971 the fertilization was repeated with the introduction of changed fertilization variants. Since this experimental part has not been able to provide any new findings in recent years, it was expanded in 1997 in its question. Since 1997, winter rye has been grown in monoculture on section 2, which means that additional plant cultivation and phytosanitary issues can be dealt with. For fertilization variants, identical to those of section 1, crop rotation effects can be identified in addition to the fertilization effects.
Data Access Statement
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Data license
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Data policy
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Organization
Humboldt University Berlin
People

Site: Thyrow

Location
Thyrow
Germany
Geographic location
52.150812, 13.140826
© OpenStreetMap contributors
Visits permitted?
No
Soil type
luvisol
Soil description
Albic Luvisol
Soil properties
VariableDepthValue (range)UnitsRef yearEstimated?Baseline?
sand 83.1 Percent
silt content 16.2 Percent
clay content 2.7 Percent
soil pH (5.5 – 8)

Design period: First period (1937—1948)

Design Type
Latin square
Description
The aim when the experiment was set up in 1937 was to investigate in the long term what changes can be seen in soil and plants, if individual macronutrients get to the minimum on a light soil.
Design description
Latin square design with eight fertilizer treatments. Treatments were replicated four times in 10×7·2m plots.
Crops
CropYears grown
potatoes
barley
maize
Crop Rotation
Unnamed
  • 1
    potatoes
  • 2
    barley
  • 3
    maize
  • 4
    barley
Factors
Factor name
Factor levels
Unfertilized
farmyard manure exposure
nitrogen fertilizer exposure
N60  (60 kgN/ha)
phosphate fertilizer exposure
P24  (24 kgP/ha)
potassium fertilizer exposure
K100  (100 kgK/ha)
calcium exposure
C250  (250 kg calcium per hectare)
Application frequency: every 3 or 4 years
Factor combinations
unfertilized
fym
farmyard manure exposure: -
NPKCa + fym
nitrogen fertilizer exposure: N60
phosphate fertilizer exposure: P24
potassium fertilizer exposure: K100
calcium exposure: C250
farmyard manure exposure: -
NPKCa
nitrogen fertilizer exposure: N60
phosphate fertilizer exposure: P24
potassium fertilizer exposure: K100
calcium exposure: C250
NPK (minus Ca)
nitrogen fertilizer exposure: N60
phosphate fertilizer exposure: P24
potassium fertilizer exposure: K100
NPCa (minus K)
nitrogen fertilizer exposure: N60
phosphate fertilizer exposure: P24
calcium exposure: C250
NKCa (minus P)
nitrogen fertilizer exposure: N60
potassium fertilizer exposure: -
calcium exposure: C250
PKCa (minus N)
phosphate fertilizer exposure: P24
potassium fertilizer exposure: K100
calcium exposure: C250

Design period: Second period; D IV/1 (1949—)

Design Type
Randomized complete block design
Description
In 1949 the experiment was divided into two parts; D IV/1 continued unchanged and D IV/2 was fertilized with P, K and lime until a normal nutrient supply and pH level were achieved.
Design description
Randomization limited
Number of plots
32
Crops
CropYears grown
potatoes
maize
spring barley
winter rye
Crop Rotation
Unnamed
  • 1
    potatoes
  • 2
    spring barley
  • 3
    maize
  • 4
    spring barley
Factors
Factor name
Factor levels
liming exposure
lime fertilisation as required to maintain pH 5.5-8
lime
nitrogen fertilizer exposure
N90  (90 kgN/ha)
phosphate fertilizer exposure
P24  (24 kgP/ha)
potassium fertilizer exposure
K100  (100 kgK/ha)
farmyard manure exposure
fym300  (300 )
Factor combinations
a1
unfertilized / without lime
a2
manure / without lime
farmyard manure exposure: fym300
a3
NPK / manure / lime
nitrogen fertilizer exposure: N90
phosphate fertilizer exposure: P24
potassium fertilizer exposure: K100
farmyard manure exposure: fym300
liming exposure: lime
a4
NPK / lime
nitrogen fertilizer exposure: N90
phosphate fertilizer exposure: P24
potassium fertilizer exposure: K100
liming exposure: lime
a5
NPK / without lime
nitrogen fertilizer exposure: N90
potassium fertilizer exposure: K100
potassium fertilizer exposure: K100
a6
NP / lime
nitrogen fertilizer exposure: N90
phosphate fertilizer exposure: P24
liming exposure: lime
a7
NK / lime
nitrogen fertilizer exposure: N90
potassium fertilizer exposure: K100
liming exposure: lime
a8
PK / lime
phosphate fertilizer exposure: P24
potassium fertilizer exposure: K100
liming exposure: lime
Measurements
VariableMaterialUnitsFrequencyScaleComment
yield componentsNot specifiedassessment of stock development, yields and yield structure
soil nutrientsNot specifiedP, K, Mg
soil pHNot specified
soil organic carbonNot specified

Design period: Second period; D IV/2 (1949—)

Design Type
Randomized complete block design
Description
In 1949 the experiment was divided into two parts; D IV/1 continued unchanged and D IV/2 was fertilized with P, K and lime until a normal nutrient supply and pH level were achieved. Winer rye monoculture from 1998.
Design description
Randomization limited
Number of plots
32
Crops
CropYears grown
winter rye
potatoes
maize
spring barley
Factors
Factor name
Factor levels
liming exposure
lime fertilisation as required to maintain pH 5.5-8
lime
nitrogen fertilizer exposure
N1 (60)  (60 kgN/ha)
N2 (120)  (120 kgN/ha)
phosphate fertilizer exposure
P24  (24 kgP/ha)
potassium fertilizer exposure
K100  (100 kgK/ha)
farmyard manure exposure
fym 150  (150 )
Factor combinations
a1
unfertilized / without lime
a2
PK / manure / lime
phosphate fertilizer exposure: P24
potassium fertilizer exposure: K100
farmyard manure exposure: fym 150
liming exposure: lime
a3
N1PK / manure / lime
nitrogen fertilizer exposure: N1 (60)
phosphate fertilizer exposure: P24
potassium fertilizer exposure: K100
farmyard manure exposure: fym 150
liming exposure: lime
a4
N2PK / lime
nitrogen fertilizer exposure: N2 (120)
phosphate fertilizer exposure: P24
potassium fertilizer exposure: K100
liming exposure: lime
a5
N1PK/lime
nitrogen fertilizer exposure: N1 (60)
phosphate fertilizer exposure: P24
potassium fertilizer exposure: K100
liming exposure: lime
a6
N1P / lime
nitrogen fertilizer exposure: N1 (60)
phosphate fertilizer exposure: P24
liming exposure: lime
a7
N1PK / without lime
nitrogen fertilizer exposure: N1 (60)
phosphate fertilizer exposure: P24
potassium fertilizer exposure: K100
a8
N1PK / without lime
nitrogen fertilizer exposure: N1 (60)
phosphate fertilizer exposure: P24
potassium fertilizer exposure: K100
Measurements
VariableMaterialUnitsFrequencyScaleComment
yield componentsNot specifiedassessment of stock development, yields and yield structure
soil nutrientsNot specifiedP, K, Mg
soil pHNot specified
soil organic matterNot specified

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