site-specific wild oat operation program (swoop)
DESCRIPTION
Site-specific Wild Oat Operation Program (SWOOP). C Fernandez-Quintanilla, J Barroso, D Ruiz Centre for Environmental Studies, CSIC A Ribeiro, B Diaz, MC Garcia Alegre, D Guinea Institute of Automatics , CSIC. 1. Associations among site properties and abundance of wild oats. Soil types. - PowerPoint PPT PresentationTRANSCRIPT
Site-specific Wild Oat
Operation Program (SWOOP)
C Fernandez-Quintanilla, J Barroso, D RuizCentre for Environmental Studies, CSIC
A Ribeiro, B Diaz, MC Garcia Alegre, D GuineaInstitute of Automatics , CSIC
1. 1. Associations Associations
among site among site properties properties
and and abundance ofabundance of
wild oatswild oats
2 0 4 0 6 0 8 0 1 0 0
2 0
4 0
6 0
8 0
1 0 0
1 2 0
1 4 0
2 0 4 0 6 0 8 0 1 0 0
2 0
4 0
6 0
8 0
1 0 0
1 2 0
1 4 0
Soil types Wild oat density
1
23
2. 2. Detection Detection systems for systems for wild oat wild oat patchespatches
Counting contactsCounting contacts
Visual assesment / walkVisual assesment / walk
Visual assesment / combineVisual assesment / combine
Economic comparison Economic comparison (C/ha)(C/ha) between the three between the three assessment methodsassessment methods
Method Contacts Visual/walk Visual/combine
Sampling cost 36 36 9
Herbicide cost 33 25 18
Fixed costs 289 289 289
Yield benefit 390 387 382
NET RETURN 32 37 66
3. Testing the 3. Testing the SWOOP SWOOP conceptconcept
Infestation levelInfestation level
00 (<0,1 panícules/m2)(<0,1 panícules/m2)
11 (0,1-1 panícules/m2)(0,1-1 panícules/m2)
22 (1-10 panícules/m2)(1-10 panícules/m2)
33 (> 10 panícules/m2)(> 10 panícules/m2)
Infestation mapInfestation map
Treatments:Treatments:
NoneNone 28 28
Assert 0.6 l/ha 43Assert 0.6 l/ha 43
Assert 1.25 l/ha 22Assert 1.25 l/ha 22
Assert 2.5 l/ha 7Assert 2.5 l/ha 7
% of area:% of area:
Treatment map Treatment map
0
1000
2000
3000
4000
Full rate 1/2 rate SSWM
Bar
ley
yiel
d (k
g/ha
) aa
Effects on barley yieldsEffects on barley yields
4. Studying 4. Studying the spatial the spatial stability of stability of wild oat wild oat patchespatches
Relationship between: Relationship between: - panicle density (at harvest time) and - panicle density (at harvest time) and - seedling density (at treatment time, next year)- seedling density (at treatment time, next year)
R2 = 0,75
0
20
40
60
80
100
0 1 2 3
Panicle density
Se
ed
ling
pro
po
rtio
n
0
1
2
0 1 2 3
Panicle density
Se
ed
ling
de
ns
ity
R2 = 0,59
PresencePresence AbundanceAbundance
From season to seasonFrom season to season
0 10 20 30 40 500
10
20
30
40
50
60
70
80
90
100
0
500
1000
1500
2500
0 10 20 30 40 500
10
20
30
40
50
60
70
80
90
100
0
50
150
280
500
0 10 20 30 40 500
10
20
30
40
50
60
70
80
90
100
0
10
20
28
50
0 10 20 30 40 500
10
20
30
40
50
60
70
80
90
100
0
10
30
50
70
1999 2000 2001 2002
N
STABILITY IN LOCATIONSTABILITY IN LOCATION
Among various seasonsAmong various seasons
STABILITY IN LOCATIONSTABILITY IN LOCATION
Test for stability of spatial distribution (Syrjala, 1996)
2000 2001 2002
P P P
1999 0,175 0,012 0,085
2000 ..... 0,138 0,174
2001 ..... ..... 0,535
1999 2000 2001 2002
STABILITY IN DENSITYSTABILITY IN DENSITY
0 10 20 30 40 500
10
20
30
40
50
60
70
80
90
100
0
10
100
1000
0 10 20 30 40 500
10
20
30
40
50
60
70
80
90
100
0 10 20 30 40 500
10
20
30
40
50
60
70
80
90
100
0 10 20 30 40 500
10
20
30
40
50
60
70
80
90
100Seedlings/m2
STABILITY IN DENSITYSTABILITY IN DENSITY
y = -1,0424x + 2086
R2 = 0,81
y = -0,9756x + 1951,9
R2 = 0,69
y = -0,587x + 1174,5
R2 = 0,610
1
2
3
4
1997 1998 1999 2000 2001
Years
log
seed
lin
gs/m
2