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University of Minnesota
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Methods for Experiment 055 -

Fertilization Treatments

For experiments 55 and 70, the following nutrients are added twice each year, once in early May and once in late June:

NutrientAmount
P2O518 g/subplot
K2O18 g/subplot
CaCO318 g/subplot
MgSO418 g/subplot
Trace Metals1/4 teaspoon/subplot
 

Each subplot is 1.44 m2. This will give each subplot a total of 25 g/m2 of each chemical per year.

Field Operations: Burning

Starting in 1991, these plots are burned each spring before the plants start growing. This is to destroy litter so there is no litter effect.

Field Operations: Fencing

A belowground gopher fence (3 feet deep and 1 foot wide) and above-ground rodent/deer fence (6 feet tall) was built around the plots in 1989. Each plot was subdivided into 26 subplots with galvanized sheet metal (26 gauge, 48" x 12") in 1988.

Field Operations: Fertilization

Fertilizer is mixed and spread by hand twice a year, once in early May and once in late June. All plots receive the same fertilizer, with none of them getting any NH4NO3.

Field Operations: Mammal Trapping

Small mammals are trapped in the fall to discourage overwinter inhabitants. Pocket gophers are trapped out of the experiment as soon as they appear (very infrequently).

Field Operations: Soil Added

Different amounts of black soil were added to the different plots. The heavy black soil settled about 1-1.5 inches in some locations. Black soil was added to compensate for the settling. One half inch was added on top of black dirt for plots that received 7, 8 or 9 inches of black dirt. A table listing the different soil recipes for the individual plots follows:

Plot Number N Level=Treatment Soil Remove (in) Black Dirt Added (in)
1402
2745
31279
4634
510 0.3
61168
714810
81057
9200.5
10845
1113810
12946
13301
14503
 

Field Operations: Watering

All plots are watered to receive at least 1.5cm/wk in April, May and October, and 2.5cm/wk in June through September.

Field Operations: Weeding

All plots and aisles are routinely weeded to keep the area free of unwanted plants and future seed sources.

Treatment layout : trmte55

How to read the competetion treatment: a. Each species is represented by two characters (see abstract ). b. The species code is followed by the percentage of this species seeds of the total number of seeds planted. Example: PV30AS70 : 30 % of seeds are from species PV and 70% are from AS. Note: Subplots 24,25, and 26 are no longer in e055

Field Identification Experiment Number Plot Number Subplot Number Treatment Competition Treatment
E551112PV30BG70
E551214SS30AS70
E55132SS100
E55149PV70SS30
E551513PV70BG30
E551616SS30BG70
E551718AS30BG70
E551822AG70BG30
E55194BG100
E5511017SS70BG30
E551115AG100
E5511223BD30PV70
E5511320PV25SS25AS25BG25
E5511415SS70AS30
E5511524BD70PV30
E5511610PV30AS70
E5511711PV70AS30
E551183AS100
E551196BD100
E551201PV100
E551218PV30SS70
E5512221AG30BG70
E5512319AS70BG30
E5512425QR50SS50
E551257QR100
E5512626BAREGROUND
E55214BG100
E552221AG30BG70
E552310PV30AS70
E552419AS70BG30
E55251PV100
E552615SS70AS30
E552724BD70PV30
E552816SS30BG70
E552917SS70BG30
E5521022AG70BG30
E5521112PV30BG70
E5521223BD30PV70
E552136BD100
E5521418AS30BG70
E5521514SS30AS70
E5521620PV25SS25AS25BG25
E552173AS100
E5521813PV70BG30
E552198PV30SS70
E5522011PV70AS30
E552212SS100
E552225AG100
E552239PV70SS30
E5522426BAREGROUND
E5522525QR50SS50
E552267QR100
E553120PV25SS25AS25BG25
E553224BD70PV30
E553312PV30BG70
E553423BD30PV70
E55359PV70SS30
E553615SS70AS30
E55378PV30SS70
E55383AS100
E553916SS30BG70
E5531017SS70BG30
E553114BG100
E5531219AS70BG30
E5531314SS30AS70
E5531413PV70BG30
E5531510PV30AS70
E553162SS100
E553176BD100
E553185AG100
E553191PV100
E5532022AG70BG30
E5532121AG30BG70
E5532211PV70AS30
E5532318AS30BG70
E553247QR100
E5532526BAREGROUND
E5532625QR50SS50
E554119AS70BG30
E55421PV100
E554321AG30BG70
E554422AG70BG30
E554514SS30AS70
E55468PV30SS70
E55473AS100
E554818AS30BG70
E554916SS30BG70
E5541011PV70AS30
E5541123BD30PV70
E5541224BD70PV30
E554134BG100
E554142SS100
E5541517SS70BG30
E5541613PV70BG30
E5541710PV30AS70
E554186BD100
E5541915SS70AS30
E554209PV70SS30
E5542120PV25SS25AS25BG25
E5542212PV30BG70
E554235AG100
E5542426BAREGROUND
E554257QR100
E5542625QR50SS50
E555117SS70BG30
E55526BD100
E555312PV30BG70
E555410PV30AS70
E55554BG100
E555624BD70PV30
E555711PV70AS30
E55581PV100
E555916SS30BG70
E555103AS100
E555118PV30SS70
E5551215SS70AS30
E5551322AG70BG30
E5551419AS70BG30
E5551514SS30AS70
E5551618AS30BG70
E5551723BD30PV70
E555185AG100
E555192SS100
E5552020PV25SS25AS25BG25
E5552121AG30BG70
E5552213PV70BG30
E5552313PV70BG30
E5552425QR50SS50
E555257QR100
E5552626BAREGROUND
E55615AG100
E556215SS70AS30
E556321AG30BG70
E556418AS30BG70
E55654BG100
E556619AS70BG30
E556713PV70BG30
E55682SS100
E556911PV70AS30
E5561023BD30PV70
E556111PV100
E556128PV30SS70
E5561324BD70PV30
E5561410PV30AS70
E556156BD100
E5561617SS70BG30
E5561716SS30BG70
E5561814SS30AS70
E5561922AG70BG30
E556209PV70SS30
E5562120PV25SS25AS25BG25
E5562212PV30BG70
E556233AS100
E5562425QR50SS50
E5562526BAREGROUND
E556267QR100
E557120PV25SS25AS25BG25
E557216SS30BG70
E557319AS70BG30
E55745AG100
E557514SS30AS70
E557621AG30BG70
E55776BD100
E557822AG70BG30
E557910PV30AS70
E5571013PV70BG30
E5571123BD30PV70
E557129PV70SS30
E557134BG100
E5571418AS30BG70
E5571517SS70BG30
E557162SS100
E557178PV30SS70
E5571811PV70AS30
E5571912PV30BG70
E557203AS100
E5572115SS70AS30
E557221PV100
E5572324BD70PV30
E5572426BAREGROUND
E557257QR100
E5572625QR50SS50
E55819PV70SS30
E55822SS100
E558320PV25SS25AS25BG25
E558418AS30BG70
E55854BG100
E558612PV30BG70
E558721AG30BG70
E558816SS30BG70
E558913PV70BG30
E558103AS100
E558115AG100
E558126BD100
E5581319AS70BG30
E5581423BD30PV70
E5581510PV30AS70
E5581619AS70BG30
E5581715SS70AS30
E5581817SS70BG30
E5581924BD70PV30
E558201PV100
E5582114SS30AS70
E5582211PV70AS30
E558238PV30SS70
E5582425QR50SS50
E5582526BAREGROUND
E558267QR100
E55919PV70SS30
E559220PV25SS25AS25BG25
E559323BD30PV70
E55941PV100
E559518AS30BG70
E559616SS30BG70
E55972SS100
E55986BD100
E55994BG100
E559108PV30SS70
E5591113PV70BG30
E5591217SS70BG30
E5591321AG30BG70
E5591424BD70PV30
E5591522AG70BG30
E559163AS100
E5591719AS70BG30
E5591815SS70AS30
E5591911PV70AS30
E5592014SS30AS70
E5592110PV30AS70
E559225AG100
E5592312PV30BG70
E5592426BAREGROUND
E559257QR100
E5592625QR50SS50
E5510115SS70AS30
E551024BG100
E5510311PV70AS30
E5510413PV70BG30
E551052SS100
E5510616SS30BG70
E5510722AG70BG30
E5510814SS30AS70
E551095AG100
E55101019AS70BG30
E55101110PV30AS70
E5510128PV30SS70
E5510139PV70SS30
E5510141PV100
E55101524BD70PV30
E5510163AS100
E55101720PV25SS25AS25BG25
E55101812PV30BG70
E55101923BD30PV70
E55102018AS30BG70
E55102121AG30BG70
E55102217SS70BG30
E5510236BD100
E5510247QR100
E55102526BAREGROUND
E55102625QR50SS50
E551114BG100
E5511222AG70BG30
E5511324BD70PV30
E5511412PV30BG70
E5511521AG30BG70
E5511611PV70AS30
E5511718AS30BG70
E5511816SS30BG70
E5511915SS70AS30
E55111023BD30PV70
E5511118PV30SS70
E55111210PV30AS70
E55111320PV25SS25AS25BG25
E55111413PV70BG30
E5511159PV70SS30
E5511162SS100
E5511171PV100
E5511183AS100
E55111919AS70BG30
E55112014SS30AS70
E5511216BD100
E55112217SS70BG30
E5511235AG100
E55112426BAREGROUND
E55112525QR50SS50
E5511267QR100
E551214BG100
E551221PV100
E5512319AS70BG30
E5512423BD30PV70
E5512513PV70BG30
E5512618AS30BG70
E5512711PV70AS30
E5512816SS30BG70
E5512915SS70AS30
E55121021AG30BG70
E55121114SS30AS70
E55121224BD70PV30
E5512139PV70SS30
E55121422AG70BG30
E55121510PV30AS70
E55121620PV25SS25AS25BG25
E5512178PV30SS70
E5512183AS100
E5512192SS100
E5512205AG100
E55122117SS70BG30
E5512226BD100
E55122312PV30BG70
E5512247QR100
E55122525QR50SS50
E55122626BAREGROUND
E5513118AS30BG70
E5513217SS70BG30
E5513311PV70AS30
E5513412PV30BG70
E551353AS100
E5513621AG30BG70
E5513713PV70BG30
E5513823BD30PV70
E551396BD100
E55131016SS30BG70
E5513112SS100
E55131222AG70BG30
E55131315SS70AS30
E55131419AS70BG30
E55131524BD70PV30
E5513164BG100
E55131710PV30AS70
E5513189PV70SS30
E5513198PV30SS70
E5513205AG100
E55132114SS30AS70
E55132220PV25SS25AS25BG25
E5513231PV100
E55132426BAREGROUND
E5513257QR100
E55132625QR50SS50
E551415AG100
E551426BD100
E5514313PV70BG30
E5514411PV70AS30
E5514519AS70BG30
E551468PV30SS70
E5514714SS30AS70
E5514822AG70BG30
E551492SS100
E5514104BG100
E55141112PV30BG70
E5514123AS100
E55141323BD30PV70
E55141417SS70BG30
E55141515SS70AS30
E5514169PV70SS30
E55141710PV30AS70
E5514181PV100
E55141916SS30BG70
E55142021AG30BG70
E55142120PV25SS25AS25BG25
E55142224BD70PV30
E55142318AS30BG70
E5514247QR100
E55142526BAREGROUND
E55142625QR50SS50
 

Vegetation Sampling

1992: Clipped centered front to back, 35-45 cm from left, strip was 10 cm X 50 cm

1993: Clipped centered from to back, 35-45 cm from right, strip was 10 cm X 50 cm

1994:

1995:

1996: Clipped 45-55 cm from left, 10 cm from front, strip was 10 cm X 1 m

1997:

1998:

1999:

2000: