vegetables in agroforestry systems
DESCRIPTION
A summary of recent esearch by AVRDC - The World vegetable Center on growing vegetables in agroforestry systems in the PhilippinesTRANSCRIPT
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Can Vegetables Be More Productive
Under Tree-Based Systems?
AVRDC-WVC Thursday Seminar, 12 June 2008
Manuel C. Palada, Ph.D.Crop & Ecosystem Management Specialist
Photo by Mandy Lin
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Outline• Overview of the SANREM CRSP Vegetable
Agroforestry Project (VAF)• Early studies on VAF• Tree-vegetable crop interface/interactions• Performance of AVRDC-WVC vegetable
varieties under VAF• Other results from the Philippines, Indonesia
and Vietnam• Summary• VAF TMPEGS Team
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Agroforestry and Sustainable Vegetable Production in Southeast Asian Watersheds (2005-2009)
SUSTAINABLE AGRICULTURE AND NATURAL RESOURCES MANAGEMENT
COLLABORATIVE RESEARCH SUPPORT PROGRAM(SANREM CRSP)
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Strong Partnership
UPLBUPLBNCA&T
UC Berkeley
De La Salle
Don Bosco
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AVRDC – The World Vegetable Center
Greg Luther Flordeliza FaustinoLiwayway Engle
Manny Palada Mubarik Ali
AVRDC – WVCSANREM Team
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Problem Statement
Communities in many forest and vegetable producing watersheds in Southeast Asia are suffering from poverty, and forest, soil and water resources degradation
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NghiaNghia TrungTrung, , BudangBudang District, District, Binh Binh PhuocPhuoc Province VietnamProvince Vietnam
May 11, 2006
VEGETABLE AGROFORESTRY PROJECT SITES
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NanggungNanggung, Indonesia, IndonesiaMay 3, 2006
VEGETABLE AGROFORESTRY PROJECT SITES
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LantapanLantapan, Philippines, PhilippinesMay 24, 2008
VEGETABLE AGROFORESTRY PROJECT SITES
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Binh Phouc Province
VIETNAM
VAF: Cacao, cashew, coffee, bananas, timber trees, vegetables
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IndonesiaNanggung Sub-DistrictNear Jakarta
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VAF: Bananas, vegetables, mix trees
Indonesia
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Lantapan, BukidnonIsland of Mindanao
Philippines
VAF: alley cropping, vegetables, bananas, timber trees
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Problem Statement
Communities in many forest and vegetable producing watersheds in Southeast Asia are suffering from poverty, and forest, soil and water resources degradation
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Response
TMPEGSTMPEGS““TeaMPEGSTeaMPEGS””
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SANREM CRSP VAF TMPEGS
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TMPEGSStands for our TeaM’s
Philosophy
Vegetable Agroforestry Systems in Southeast Asian Watersheds
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PEGS• A peg is a pin
forming a projection that may be used as a support
TMPEGS Philosophy:TMPEGS Philosophy:““We are We are ‘‘PEGSPEGS’’ supporting small scale supporting small scale farmers both farmers both womenwomen and menand men””
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TMPEGS
echnology‘complementarity’
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TMPEGS
arketing‘value chain’
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TMPEGS
olicy‘incentives’
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TMPEGS
nvironmentalnvironmental &&conomicconomic--social impactsocial impact
‘‘it worksit works’’
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TMPEGS
ender ‘equity’
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TMPEGS
caling-up‘contagiousness’
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Scaling-up
Vegetables
Trees
Complementary agroforestry systems
Technology
Marketing
GenderPolicy Stakeholders mainly Small Scale
Farmers both Women and Men
Predominant flowFeedback flow
Baseline studies
Conceptual Framework
Environmental and Socio-Economic
Impacts
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Overall hypothesisOverall hypothesis
In intensive vegetable In intensive vegetable production system in the production system in the uplands, monoculture uplands, monoculture systems are not systems are not sustainable, but sustainable, but integrating trees is integrating trees is feasible and offers better feasible and offers better prospects.prospects.
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Alley Cropping
Vegetable Agroforestry (VAF) systems is inevitably the most Vegetable Agroforestry (VAF) systems is inevitably the most appropriate technology for the uplands to enhance the productiviappropriate technology for the uplands to enhance the productivity, ty, profitability and protective functions of vegetable production sprofitability and protective functions of vegetable production system in ystem in a sustainable manner, while reducing production risks and a sustainable manner, while reducing production risks and environmental hazards of vegetable production system. environmental hazards of vegetable production system.
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Early Studies on Vegetable Agroforestry Systems
• International Institute of Tropical Agriculture (IITA) Nigeria (1985-90)
• University of the U.S. Virgin Islands, St. Croix (1991-2001)• Center for Subtropical Agroforestry,
University of Florida (2002-2005)
Vegetable Agroforestry Systems in Southeast Asian Watersheds
Alley cropping Leucaena with leafy Chinese cabbage (Pai-tsai)Chen, Y.S., B.T. Kang and F.E. Caveness. 1989. Alley cropping vegetable crops with Leucaena in Southern Nigeria. HortScience 24(5):839-940.
No alley With alley
No alleyNo alley
With alleyWith alley
IITA, Nigeria
Alley cropping with amaranthus, celosia, tomato and okra
Treatments: Alley (+Fertilizer)Alley (-Fertilizer)No Alley (+Fertilizer)No Alley (-Fertilizer)
Leucaena hedgerows: 4 mAlley width: 4 m
Palada, M.C., B.T. Kang and S.L. Claassen. 1992. Effect of alley cropping Leucaenaleucocephala and fertilizer on yield of vegetable crops. Agroforestry Systems 19:139-147.
IITA, Nigeria
Hedgerow intercropping pigeonpea with bell pepper
Pruning hedgerows Pruning applied as mulch
Palada, M.C., S.M.A. Crossman and C.D. Collingwood. 1992. Effect of pigeonpea hedgerows on soil water and yield of intercropped pepper. Proc. Caribbean Food Crops Soc. 28:517-532.
St. Croix, U.S. Virgin Islands
Alley cropping Moringa with medicinal plants and culinary herbs Palada, M.C., B.N. Becker, J.M. Mitchell and P.K.R. Nair. 2003. Cultivation of medicinal plants in alley cropping system with Moringa oleifera in the Virgin Islands. Pp. 60-76 In: Y.N. Clement and C.E. Seaforth (eds). Proc. 6th Int’l Workshop on Herbal Medicines for the Caribbean. Univ. of the West Indies, St. Augustine, Trinidad & Tobago.
St. Croix, U.S. Virgin Islands
Rao, M.R., M.C. Palada and B.N. Becker. 2004. Medicinal and aromatic plants in agroforestry systems. Agroforestry Systems 61:107-122.
Palada, M.C., J.M. Mitchell, B.N. Becker and P.K.R. Nair. 2005. The integration of medicinal plants and culinary herbs in agroforestry systems for the Caribbean: A study in the U.S. Virgin Islands. Acta Hort. 676:147-153.
St. Croix, U.S. Virgin Islands
Hedgerow intecropping eggplant and sweet corn with Leucana, Gliricia, Moringa and Pigeonpea.
Palada, M.C., J.J. O’Donnell, S.M.A. Crossman and J.A. Kowalski. 1994. Influence offour hedgerow species on yield of sweet corn and eggplant in an alley cropping system. Agron. Abst. 1994:7.
Maize in Moringa hedgerows
Maize in Leucaena hedgerows
Hedgerow/alley plot
No hedgerow plot
Morinda hedgerows
Hot pepper
5 m
1 mRow 3
Row 4 Row 1
Row 2
Palada, M.C., B.N. Becker and J.M. Mitchell. 2004. Growth and yield of hot pepper in hedgerow intecropping with Morinda (Morinda citrifolia L.) during early establishment. Proc. Caribbean Food Crops Soc. 40:22-28.
St. Croix, U.S. Virgin Islands
Palada, M.C., S.M.A. Crossman and J.J. O’Donnell. 2004. Integrating high value horticultural crops into agroforestry systems in the tropics with focus on alley cropping. Proc. Symp. On Celebrating Minority Professionals in Forestry and Natural Resources Conservation. Florida A&M Univ. Tallahassee, Florida.
Photo by Mandy Lin
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TMPEGS
Technology objective:Develop economically viable and ecologically-sound vegetable-agroforestry (VAF) systems
Evolution of the AF system in Southern Philippines (Mindanao) (hedgerow intercropping)
1970-90:Pruned hedgerow
1990-2000: NVS –Natural Veg. Strips
2000- present: commercial trees
PositiveControl soil erosionProvide organic fertilizerFodder for animalNegativeLabor intensiveCompetes with crops:space, growth resources, labor, etc
PositiveVery cheap to establishControl soil erosion effectivelyNegativeNo economic benefits
?Potentials:Productivity/ProfitabilitySustainabilityDiversityEnvironmental services
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Environmental services
Reduction of soil loss..Effect of different hedgerow types on soil loss
===============================Hedgerow systems Soil loss (Mg ha-1)-----------------------------------------------------Grasses 2.20 cForage legumes 9.80 cShrubs 5.70 cTrees 6.50 cContour cultivation 40.0 bTraditional cultivation 350.0 a
(up & down the slope)
Tolerable rate 12.0=============================================Rainfall: 3000 mm annually “The greatest immediate impact of timber hedgerow system is reducing soil loss about 55 times than traditional up and down the slope cultivation thus making soil nutrients that will become available to the food crops”.
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Relative yield of maize over six cropping periods as influenced by different timber tree species as hedgerows spaced at 8m x 3m
Yield of control
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Tree-Crop Interactionin
Hedgerow Intercropping
Vegetable Agroforestry Systems in Southeast Asian Watersheds
Safety-net zone
Schematic diagram of tree-crop interaction in hedgerow intercropping system
+reduction of negative effects through silvicultural management
N 2 - fixation C0 2 - fixation
Yield of control (monocropping systems)
tree-crop nutrient transfer through pruning and roots and nodules turn-over.
leaching of nutrients to lower depths 0 - 100 cm depth
> 100 cm depth
uptake from safety- net zone (nutrient pumping below root zone of annual crops)
+
fertility, micro-climae, erosion control, nutrient pumping, safety-net, tree biomass and soil C stocks
=+competition: light, water nutrient=-
--
Net benefit = 2T+ (Y2-2Y1)-2Dwhere: T = value of tree products (inc above and below C stocks, N2
fixation)
Y1 = yield loss Y2 = yield gain D = value of displaced crop
D
Y1 Y1
Y2
Schematic diagram of tree-crop interaction under parkland system
N 2 - fixation C0 2 - fixationScenario 1. Competition
> 100 cm depth
0 - 100 cm depth
leaching of nutrient
+
+ uptake of H20, nutrients
- Tree is competitive
-
Scenario 2. Complementary
+ +
Net benefit = T + (Y2 - D)
Schematic diagram of tree-crop interaction under boundary planting system
> 100 cm depth
0 - 100 cm depth
+ Y2
Y1
Y = T + (Y2 - Y1) - D
-
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Vegetable Agroforestry System ResearchGoal:
Tree-vegetable integration on farm with minimal negative interaction but optimal positive interaction, thus increasing productivity, economic profitability, nutrient use efficiency and environmental services
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Tree integration on intensive vegetable based systems with minimal negative interaction
Approaches:• Tree-vegetable
matching• Tree management• Crop management
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Methodology
1. Assessment of existing VAF systems covering 21 farms, 2 AF systems, 6 tree species, 8 vegetables, 4 aspects. Data collected were tree parameters (stem diameter, tree height, canopy height and width), spatial performance of vegetables (height, stem diameter, crown width, biomass), spatial light transmission (fish eye photography/quantum light meter)
2. Focus group discussion with 15 VAF farmers on various ways of integrating trees on vegetable farms and their practices and experiences on tree and vegetable management addressing tree-vegetable competition and complementarity
3. Evaluation of 5 commercial, 20 indigenous, and 5 tree vegetables under tree-based system.
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Eucalyptus- tomato interaction under boundary planting system
Tomato height
0102030405060708090
100110120130140150
0 3 6 9 12 15
Distance from the tree
heig
ht (c
m)
Competition Complementarity Neutral
Average height at neutral zone
(m)
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White bean yield under Maesopsis eminii hedge trees
0
5
10
15
20
0 5 10 15 20
Distance from the tree
Bea
ns (g
/plt)
M. eminii hedge
Competition zone Complementarity zone Neutral zone
Three zones of tree-crop interaction in vegetable agroforestry systems
Average yield
(m)
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Net complementarity as a simple tool in assessing appropriate tree-vegetable integration
• Net complementarity = degree of complementarity-degree of competitiveness
• Degree of complementarity = relative yield (at complementary zone) -1 x distance of influence (0= no complementarity)
• Degree of competitiveness = 1- relative yield (at competition zone) x distance of influence (0= no competition)
• Relative yield at complementarity zone = yield at complementarity zone divided by yield at neutral zone
• Relative yield at competition zone = yield at competition zone divided by yield at neutral zone
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Influence of timber tree species on VAF net complementarity under farmer management
(tree-vegetable matching)
-0.23
0.48
-0.30
-0.85
-1.67
Acacia mangium
Eucalyptus robusta
Eucalyptus torillana
Gmelina arborea
Maesopsis emini
Net complementarityTree species
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Influence of vegetable crops on net complementarity under farmers management (tree-vegetable matching)
0.14
-7.54
0.98
0.44
0.57
-0.48
-1.67
-1.55
Bell pepper
Brocolli
Cabbage
Cauliflower
Chinese cabbage
Tomato
White beans
Maize
Net complementarity indexVegetables
Influence of aspects on VAF net complementarity
North (vegetable on south side) South (vegetable on north side)
East (vegetable on west side)West (vegetable on east side)
North
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-2.09- 0.54-1.06-1.74
East (vegetable on west side)
West (vegetable on east side)
North (vegetable on south side)
South (vegetable on north side)
Net complementarity
Aspects
Influence of aspects on net complementarity under farmer’s crop management
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Relationship between tree height (m) and net complementarity
y = 0.3034x + 12.696R2 = 0.14
0
2
4
6
8
10
12
14
16
18
20
(10.00) (5.00) - 5.00 10.00
Net complementarity
Tree
hei
ght (
m)
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Relationship between proportion of canopy left after pruning vs net complementarity
y = 2.0991x + 62.359R2 = 0.03
0
20
40
60
80
100
120
(10.00) (5.00) - 5.00 10.00
Net complementarity
Prop
ortio
n of
can
opy
left
(%)
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Relationship between tree canopy width and net complementarity
y = -14.254x + 560.37R2 = 0.08
0
100
200
300
400
500
600
700
800
900
(10.00) (5.00) - 5.00 10.00
Net complementarity
Can
opy
wid
th (c
m)
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Vegetable-tree matching• Evaluation of 5 commercial, 20
indigenous (from AVRDC GRSU), and 5 tree vegetables under tree-based system involving leafy, fruit and root vegetables.
• Vegetables were planted 2 rows perpendicular to the 6-year old Eucalytus torillana tree row 25 cm from tree trunk.
• Vegetable entries were arranged in RCB design replicated 3 times.
• Vegetables were harvested spatially row by row.
• Zones of interaction were calculated in each plot.
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Promising vegetables at competition zone (4.5 ±1.2 m from tree hedge)
Type Species Scientific name VarietyLeafy Amaranthus (5) Amaranthus caudatus TOT 2272 0.80 a
Jute (4) Corchorus olitorius TOT 4721 0.53 cCabbage Brassica oleracea Resest crown 0.73 abChinese cabbage Brassica rapa Blues 0.63 b
Fruit Eggplant (3) Solanum melongena S00- 633 0.67 b
Bellpepper Capsicum annuum 9950-5197 0.80 aOkra Abelmoschos esculentus 0.60 bTomato Lycopersicon esculentumWVCT-1 0.73 ab
Climbing Alugbati (3) Basella alba TOT 5274 0.73 ab
Yardlong bean (3) Vigna unguiculata TVO 2074 0.40 dTree (4) Malunggay M oringa oleifera local 0.57 bc
Chinese malunggay Sauropus androgynous local 0.80 aRoot Carrots Daucus carota local 0.80 a
In a column, means having a common letters are not significantly different by
by Tukey's test at 5% level
Adaptability index
Adaptability index = Yield at competition zone (Y1) / yield at neutral zone (Y0)Where: 1 = adapted
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Promising vegetables at complementarity zone(from 5 – 15 (±2) m from tree hedge)
Type Species Scientific name VarietyComplementarity
indexLeafy Amaranthus (5) Amaranthus caudatus TOT 2272 Taiwan 2.10
Jute (4) Corchorus olitorius TOT 6667 2.70Cabbage Brassica oleracea Resest crown 1.33Chinese cabbage Brassica rapa Blues 1.60
Fruit Eggplant (3) Solanum melongena S00- 633 1.50Bellpepper Capsicum annuum 9950-5197 1.57Okra Abelmoschos esculentus 1.57Tomato Lycopersicon esculentumWVCT-1 1.33
Climbing Alugbati (3) Basella alba TOT 5274 1.87Yardlong bean (3) Vigna unguiculata TVO 2141 Philippines 2.27
Tree Malunggay (4) Moringa oleifera local 1.43Chinese malunggay Sauropus androgynous local 1.17Katuray Sesbania grandiflora local 3.37
Root Carrots Daucus carota local 1.57
Complementarity index = Yield at complementarity (Y2) / yield at neutral zone (Y0)Where: 1= no complementarity effect
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Net complementarity indices of selected vegetables planted perpendicular to the tree line (researcher-managed)
Net complementarity index = Y2-Y1Where: 0 = no benefit
Type Species Scientific name VarietyLeafy Amaranthus (5) Amaranthus caudatus TOT 2272 1.30 abc
Jute (4) Corchorus olitorius TOT 6667 2.40 a
Cabbage Brassica oleracea Resest crown 0.60 bc
Chinese cabbage Brassica rapa Blues 0.97 bc
Fruit Eggplant (3) Solanum melongena S00- 168 1.27 abc
Bellpepper Capsicum annuum 9950-5197 0.50 c
Okra Abelmoschos esculentus 0.97 bc
Tomato Lycopersicon esculentum WVCT-1 0.67 bc
Climbing Alugbati (3) Basella alba TOT 1578 1.13 abc
Yardlong bean (3) Vigna unguiculata TVO 2141 1.97 ab
Tree (3) Malunggay Moringa oleifera local 0.83 bc
Alikway Sauropus androgynous local 1.03 abc
Katuray Sesbania grandiflora local 3.10 a
Root Carrots Daucus carota local 0.77 bc
In a column, means having a common letters are not significantly different by Tukey's test at 5% level
Net complementarity index
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INDONESIA•Effect of shading on yields of vegetables under mixed-tree species
Vegetable Agroforestry Systems in Southeast Asian Watersheds
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Indonesia – mixed tree species
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Indonesia – mixed tree species
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Adaptation of vegetables under different shading regimes in multi-storey agroforestry system in Indonesia.
Increase in yield over no shade
9Chili5Tomato
71Eggplant90Kangkong180Amaranth spp
Medium light(%)
Vegetables
Note: Under heavy shade (Low light: 32-174*1000 lux), the growth and yield of 10 vegetables evaluated were negatively affected. (Medium light: 43-540*1000 lux). Adapted from Manurong et al 2008. Can vegetables be productive under tree shade management in West Java?
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VIETNAM•Shading effect on yield of vegetables•Termite Biocontrol on Cacao Seedlings: Vetiver Grass Application
Vegetable Agroforestry Systems in Southeast Asian Watersheds
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Vietnam - Cashew
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Vietnam: Cashew - Vegetables
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Vietnam: Cashew - Vegetables
1.1. Amaranth, Amaranth, kangkongkangkong, okra, and , okra, and bitter gourd achieved highest yield bitter gourd achieved highest yield under full sun light condition under full sun light condition
2.2. Mustard and French bean have Mustard and French bean have highest yield under medium highest yield under medium light conditionlight condition
3.3. Average yield of cashew trees Average yield of cashew trees located between two vegetable located between two vegetable rows was recorded to be 17% rows was recorded to be 17% more than average yield without more than average yield without vegetables planted.vegetables planted.
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Biocontrol of Termite in Cacao Trees
Termite damage on cacao treeVetiver grass
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Percent mortality in cacao seedlings due to termite damage as influenced by biocontrol methods
330Manure + Vetivergrass compost + Vetiver plants
7017Manure + Lime
700Farmer’s Practice(Chemical)
7039Manure
Site 2Mortality (%)
Site 1Mortality (%)
Treatment
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PHILIPPINES•Vegetable variety trials •Drip irrigation•Minimum tillage – cover crop
Vegetable Agroforestry Systems in Southeast Asian Watersheds
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Tomato Variety Trial
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Tomato Variety Trial
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Evaluation of Indigenous Vegetables
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Indigenous Vegetables
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Indigenous Vegetables
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Indigenous Vegetables
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Conventional Vegetables
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Medicinal Trees
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Medicinal Trees
Vegetable farmers performing evaluation of the performance of different tomato superior lines against tomato leaf curl virus under tree based system during the farmers’ field day at Claveria, Misamis Oriental, Philippines. These tomato lines were provided by AVRDC.
AVRDC tomatoes and eggplants evaluated under tree based system were shown to vegetable farmers during farmers’ field day at Lantapan, Bukidon, Philippines.
Farmers posed at the experimental billboard after evaluating different tomato lines which are resistant to tomato leaf curl virus (ToLCV) during the farmers field at Claveria, Misamis Oriental, Philippines
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Henry BinahonOutstanding Agroforestry Farmer
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Binahon Farm Model Vegetable Agroforestry Farm
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Drip irrigation
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Miniumum tillage with cover crop
Perennial peanut (Arachis pintoi)
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Taiwan
AVRDC-WVC Vegetable AgroforestryResearch Field ( Established in 2005)
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Tropical Fruit Trees
AbiuPouteria caimito Radlk*CanistelPouteria campechiana*Star AppleChrysophyllum caimito*
Nam Pheung HoneySyzygium samarangense*Strawberry guavaPsidium littorale RaddiSurinam cherryEugenia unifloraBrasil cherryEugenia brasiliensisJackfruitArtocarpus heterophyllus*TamarindTamarindus indica*MafaiBaccaurea ramifloraBiribaRollinia mucosaBullock’s HeartAnona reticulataCommon nameSpecies
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Pouteria camechiana - Canistel
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Pouteria caimito - Abiu
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Chrysophyllum caimito – Star Apple
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Artocarpus heterophyllus – Jack Fruit
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Tamarindus indica - Tamarind
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Syzygium samarengense – Wax Apple
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Sequential cropping of vegetable crops
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Sequential cropping of vegetable crops
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Question
Can Vegetables Be More Productive Under Tree-Based Systems?
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Answer
Of course, the answer is YES!
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Summary and Recommendations
1. Reduce competition between trees and vegetables (Y1) by:• - Using vegetables that have high adaptability indices, adapted
to low light environment, at competition zone (up to 4.5m from tree line)
• - Using trees which are less competitive- Employing tree root pruning and root barrier (chili yield was
significantly higher in with root barrier treatment)
Can Vegetables Be More Productive Under Tree Based Systems?
3 ways of improving economic viability of vegetable agroforestry systems
Yes!
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2. Increase tree-vegetable complementarity (Y2)-Using vegetables with high complementarity response indices at
complementarity zone (4.6 – 15 m away from the tree line)- Employing appropriate pruning regime, leaving 40- 60% of the
tree canopy- favorable for both trees and crops- Using optimum tree lines/hedges spacing, 25-30 meters apart
and 3 meters between trees, having approximately 110- 130 trees per hectare
3. Use valuable trees (T)- Premium timber trees (indigenous species)- Adapted fruit trees (Taiwan)- Rubber trees
3 ways of improving economic viability of vegetable agroforestry systems
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Acknowledgement
This study was funded and supported by the Sustainable Agriculture and Natural Resources Management – Collaborative Research Support Program (SANREM-CRSP) under U.S. Agency for International Development (USAID).
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TMPEGS VAF Collaborators
• Agustin Mercado, Jr. - World Agroforestry entre• Caroline Duque World Agroforestry Centre• Manuel Palada – World Vegetable Centre• Liwayway Engle - World Vegetable Centre• Flordeliza Faustino - World Vegetable Centre • Gregory Luther - World Vegetable Centre • Gerhard Manurong - World Agroforestry Centre• James Roshetko - World Agroforestry Centre• Bambang Purwoko - Bogor Agricultural University • Anas Susila - Bogor Agricultural University • Try Van My - Nong Lam University, Vietnam • Manuel Reyes - North Carolina A&T State University
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SANREM CRSP VAF TMPEGSThank you for joining us!
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Photo by Mandy Lin