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Development of Package of Technology for Sustainable Organic Sweet potato Production in Central Luzon

Researchers: Jonathan L. Galindez, Fe L. Porciuncula,

Rodolfo D. Martin and Mietch G. Dela Cruz, Lani Lou Mar A. Lopez

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High cost of inorganic fertilizers commonly used by farmers
Low yield due to insufficient nutrient application

Brief Description of Technology Information

Support OA agenda of DA by developing a package technology with ecologically C sustainable for sweet potato production

RDE Agenda Addressed

Develop a package of technology for organic sweet potato production in Central Luzon

Technology Developed Information Generated

Reduce the expenses

of sweet potato growers

in the selected municipalities and the whole province.

Increase yield of SP farmers
Contribute to adoption strategies for coping with the erratic environmental condition

Potential

Impact

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Introduction

Sweet potato is one of the major crops grown in the Region, particularly in Tarlac, Bataan, Nueva Ecija and Zambales
Tarlac province contributes the highest production with an average of 35, 672.96 tons while Bataan, Zambales and Nueva Ecija obtained an average production of 2,609.00, 2,276.35 and 1,137.36 tons, respectively (PSA, 2017).

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Introduction

Among the varieties of sweetpotato, Super bureau, Taiwan and Bentong are the most acceptable varieties among the sweet potato growers in Central Luzon

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Objectives

To identify sweet potato variety/ies that were perform well under organic condition.

To develop nutrient management for organic sweet potato production.

To develop pest and disease

management for organic sweet

potato production

To develop efficient water

management for organic sweet

potato production

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Objectives

To Assess costs and returns and production efficiency of sweet potato and package the development technology into techno guide and develop other information, education and communication materials for use in eventual promotion

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METHODOLOGY

STUDY 1. Varietal Screening for Organic Sweet potato Production

Study 2. Development of Bio-pesticides for Insect Pest Management for

Organic Sweet potato Production

STUDY3. Effect of Irrigation Frequency on the Yield of Sweet potato under Organic System

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On-station Varietal Evaluation/ Technology Packaging

STUDY 1 Varietal Screening and Organic Fertilizer and Microbial rate for Organic Sweet potato Production

Collection of identified five high yielding varieties of sweet potato

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STUDY 1 Varietal Screening and Organic Fertilizer and Microbial rate for Organic Sweet potato Production

Objectives

To identify promising varieties of sweet potato under organic system.

To determine

the appropriate amount and combination of

organic

fertilizer and Tricho

plus

for organic sweetpotato

production.

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Varietal Characteristics

Days to maturity (110 DAP)
Yield (34.94 tons/ha)

Skin color: dark purple

Flesh color: dark purple

JAPONITA

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Varietal Characteristics

Days to maturity (110)
Yield (27.02 tons/ha)
Skin color (dark purple)
Japan variety, a new line introduce in Tarlac
Twinning an spreading vine and green vine with elliptic and dark purple leaves
Color cream flesh color with disperse arrangement

SPJ

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Varietal Characteristics

PSB- SP30

Days to maturity (110 days)
Yield (13.41 tons/ha)
Light Orange Flesh

Yellow orange Skin color

Green Old Leaves

Purplish Young Leaves

Green Petiole

Green Vine

Early Maturing

Creeping Growth Heart Shape Leaves

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Varietal Characteristics

Early Maturity (110-120 DAP)

Average Yield (11.08 tons/ha) Green/Purple foliage

Purple Tuber Skin

White Tuber Flesh

Semi-Spreading with moderate leaf lobbing

Green Vine

VSP6

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Varietal Characteristics

KINEROTS

Early maturity (90-100 DAP)
Yield (18.53 tons/ha)
White skin color
Orange flesh

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ON –STATION and On-Farm

Study Site: CLSU RM- CARES, Science City of Muñoz, N. E

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Baseline Information (station)

Initial crop : Onion
Soil Analysis :N- Low, P-Medium and K- Sufficient, pH-5.8
Type of Soil: Clay loam
Area of Production: 1274 sq m
Distance of planting: between hill 0.30 m and between row 0.75 m
Irrigation:2 times a week or depend on the

soil moisture

Cultivation done at 30 DAP
Fertilization: Split Application (Basal and

at 30 DAP)

Source of Fertilizer: RM-CARES Organic Fertilizer and Trichoderma

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Establishment of the study and Off- site Trial (BATAAN)

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Baseline Information (Bataan)

Initial crop : 1 year vacant
Soil Analysis :N- Low, P-Low and K- Sufficient, pH-5
Type of Soil: Clay
Area of Production: 1274 sq m
Distance of planting: between hill 0.30 m and between row 0.75 m
Irrigation: No irrigation for 1^stmonth
Cultivation done at 30 DAP
Fertilization: Split Application (Basal and at 30 DAP)
Source of Fertilizer: RM-CARES Organic Fertilizer and Trichoderma

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Establishment of the study and Off- site Trial (TARLAC)

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Baseline Information (Tarlac)

Initial crop : 1 year vacant
Soil Analysis :N- Low, P-Low and K- Sufficient, pH-5
Type of Soil: Clay
Area of Production: 1274 sq m
Distance of planting: between hill 0.30 m and between row 0.75 m
Irrigation: No irrigation for 1^stmonth
Cultivation done at 30 DAP
Fertilization: Split Application (Basal and at 30 DAP)
Source of Fertilizer: RM-CARES Organic Fertilizer and Trichoderma

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Establishment of the study and Off- site Trial (ZAMBALES)

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Baseline Information (Zambales)

Initial crop : Rice
Soil Analysis :N- Low, P-Low and K-Low, pH-5
Type of Soil: Sandy Loam
Area of Production: 1274 sq m
Distance of planting: between hill 0.30 m and between row 0.75 m
Irrigation: 45 days start of irrigation
Cultivation done at 30 DAP
Fertilization: Split Application (Basal and at 30 DAP)
Source of Fertilizer: RM-CARES Organic Fertilizer and Trichoderma

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Treatments (V1,V2,V3,V4&V5)	Rate of Organic Fertilizer/plot	Rate of Trichoderma/plot	Timing of Application
OF1 - 4 tons/ha	4 kg	250 g	Basal and 30 DAP
OF2 - 6 tons/ha	6 kg
OF3 - 8 tons/ha	8 kg
OF4 -10 tons/ha	10 kg

Treatments followed by the timing of application

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Cultural Management Practices

Pest management

Weeding

Irrigation

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On-site

RESULT OF THE STUDY

Treatment		Percent Survival		Days to maturity		Vine length
Treatment		Percent Survival		Days to maturity		30 DAP		Harvest
A. Variety		Year 1	Year 2	Year 1	Year 2	Year 1	Year 2	Year 1	Year 2
V1-SPJ		91.76^c	96.67^c	110	110	68.50^a	51.56^a	201.37^a	114.63^b
V2-PSB SP30		87.41^e	94.86^c	110	110	53.53^b	45.65^b	186.53^b	144.72^a
V3-VSP6		100.00^a	95.97^b	110	110	44.34^d	46.33^b	162.82^c	114.37^b
V4-Kinerots		89.58^d	97.91^a	90	110	50.28^c	46.60^b	140.95^e	100.95^c
V5-Japonita		96.35^b	94.31^b	110	110	53.19^b	44.01^b	145.95^d	83.64^d
B.Organic Fertilizers
OF1-2 t/ha	-		95.28^c	-	110	-	ns	-	113.24^b
OF2-4 t/ha	93.97^a		93.33^d	106	110	ns	ns	168.08^b	123.97^a
OF3-6 t/ha	93.26^a		96.24^bc	106	110	ns	ns	159.53^c	110.20^b
OF4-8 t/ha	93.19^a		97.08^ab	106	110	ns	ns	177.88^a	111.16^b
OF5-10 t/ha	91.67^a		97.78^a	106	110	ns	ns	164.36^b	99.79^c

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On-site

RESULT OF THE STUDY

Treatment	No. of tubers		Wt. of tubers		Yield(t/ha)
A. Variety	Year 1	Year 2	Year 1	Year 2	Year 1	Year 2
V1-SPJ	2.85^b	2.67^cd	607.92^b	323.67^d	27.02^b	14.39^b
V2-PSB SP30	2.25^c	3.71^b	301.67^d	335.73^b	13.41^d	14.92^b
V3-VSP6	2.72^b	2.57^d	249.50^e	284.80^e	11.08^e	12.70^c
V4-Kinerots	2.82^b	4.43^a	409.50^c	440.87^a	18.53^c	19.58^a
V5-Japonita	4.78^a	3.13^c	793.75^a	331.40^c	34.94^a	14.68^b
B.Organic Fertilizers
OF1-2 t/ha	-	ns	-	345.07^b	-	15.34^b
OF2-4 t/ha	ns	ns	453.60^c	371.00^a	ns	16.49^a
OF3-6 t/ha	ns	ns	427.47^d	323.53^c	ns	14.37^c
OF4-8 t/ha	ns	ns	535.47^a	314.33^d	ns	14.19^c
OF5-10 t/ha	ns	ns	473.33^b	312.53^d	ns	13.88^c

Kinerots & Japonica

with 4t/ha

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Off-site (Tarlac)

RESULT OF THE STUDY

Treatment	Percent Survival	Days to maturity	Vine length at 30 DAP	Vine length at harvest	No. of tubers	Wt of tubers	Yield/ha
A. Variety	Year 1	Year 1	Year 1	Year 1	Year 1	Year 1	Year 1
V1- PSBSP30	71.53^d	108	73.29^b	347.01^a	1.89^c	179.67^e	7.99^d
V2- SPJ	94.44^bc	108	95.69^a	315.23^b	2.13^bc	345.31^a	15.35^a
V3-Japonita	98.47^a	108	71.55^b	344.09^a	2.68^a	239.20^c	10.62^c
V4-Kinerots	95.90^ab	108	56.60^c	236.67^c	2.83^a	280.80^c	12.41 ^b
V5- VSP6	91.95^c	108	57.17^c	242.13^c	2.52^ab	290.03^b	12.89^b
B.Organic Fertilizers
OF1-2 t/ha	90.83	108	68.40^c	295.74^b	2.56	273.53^b	12.15^b
OF2-4 t/ha	90.42	108	75.55^a	315.41^a	2.47	309.47^a	13.75^a
OF3-6 t/ha	90.42	108	65.23^c	289.87^b	2.13	238.53^e	10.60^c
OF4-8 t/ha	90.28	108	72.00^b	297.88^b	2.44	250.47^d	11.07^b
OF5-10 t/ha	90.34	108	73.13^a	286.23^b	2.45	263.00^c	11.69^b

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Off-site (Tarlac)

RESULT OF THE STUDY

Treatment	Percent Survival	Days to maturity	Vine length at 30 DAP	Vine length at harvest	No. of tubers	Wt of tubers	Yield/ha
C. A X B
V1OF1	69.44^f	108	_63.00hijkl	304.63^de	2.00	213.33^l	9.48^kl
V2OF1	95.14^abcd	108	87.87^bcd	341.40^abc	2.07	350.00^c	15.56^c
V3OF1	98.61^a	108	79.27^def	355.07^ab	2.87	197.67^m	8.74^lm
V4OF1	97.22^ab	108	53.20^lm	234.00ⁱ	3.40	313.33^e	13.93^de
V5OF1	93.75^abcd	108	58.67^kl	243.60^hi	2.47	293.33^f	13.04^ef
V1OF2	77.78^e	108	71.27^fghi	360.80^a	1.93	181.67ⁿ	8.07^lm
V2OF2	90.97^bcd	108	118.20^a	363.93^a	2.33	473.87^a	21.06^a
V3OF2	98.61^a	108	72.40^efgh	354.07^ab	2.73	271.67ⁱ	12.07^fghi
V4OF2	95.14 ^abcd	108	54.93l^m	262.00^gh	2.80	336.67^d	14.97^cd
V5OF2	89.58 ^cd	108	60.93^jkl	236.27ⁱ	2.53	283.47^gh	12.60^efgh
V1OF3	70.83 ^f	108	_65.53ghijk	349.73^ab	1.67	148.33^o	6.59ⁿ
V2OF3	90.97 ^bcd	108	84.80^cd	272.20^fg	2.20	384.33^b	17.08^b
V3OF3	100.00^a	108	73.27^efg	362.80^a	2.20	210.00^l	9.33 ^kl
V4OF3	93.75^abcd	108	56.00^klm	236.13ⁱ	2.27	196.67^m	8.74 ^lm
V5OF3	96.53^abc	108	46.53^m	228.47ⁱ	2.33	253.33 ^j	11.26 ^hij

SPJ with 4t/ha

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Off-site (Bataan)

RESULT OF THE STUDY

Treatment	Percent Survival	Days to maturity	Vine length at 30 DAP	Vine length at harvest	No. of tubers	Wt. of tubers	Yield/ha
A. Variety	Year 1	Year 1	Year 1	Year 1	Year 1	Year 1	Year 1
V1- PSB SP30	79.30^d	110	48.72^a	119.85^a	2.07^bc	238.33^b	10.59^b
V2- SPJ	83.33^b	110	40.51^c	98.77^c	2.41^ab	249.00^a	11.08^a
V3- Kinerots	86.95^a	110	44.63^b	91.57^e	2.67^a	219.33^c	9.75^c
V4-Japonita	80.56^c	110	41.36^c	95.84^d	2.21^bc	214.00^c	9.51^c
V5- VSP6	78.20^e	110	40.24^c	105.92^b	1.92^c	182.33^d	8.10^d
B.Organic Fertilizers
OF1-2 t/ha	80.97^c	110	40.47^d	101.45^cd	2.09^b	185.67^d	8.27^c
OF2-4 t/ha	86.25^a	110	42.59^c	101.88^c	2.12^b	231.33^b	10.28^b
OF3-6 t/ha	77.92^e	110	44.15^b	100.97^d	2.13^b	193.73^c	8.61^c
OF4-8 t/ha	80.69^d	110	46.97^a	103.01^b	2.49^a	238.93^b	10.62^b
OF5-10 t/ha	82.50^b	110	41.28^d	104.64^a	2.44^ab	253.33^a	11.26^a

SPJ &PSB SP30

with 10t/ha

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RESULT OF THE STUDY					Off-site (Bataan)
Treatment	Percent Survival	Days to maturity	Vine length at 30 DAP	Vine length at harvest		No. of tubers	Wt. of tubers	Yield/ha
C. A X B
V1OF1	80.55^fgh	110	51.27^ab	120.80^b		_2.07defgh	176.67^g	7.85^h
V2OF1	88.19^bc	110	38.13^hij	101.13^h		_2.47bcdefg	135.00^h	6.08ⁱ
V3OF1	84.72^cde	110	_41.33efghi	92.33^k		_1.87efgh	176.67^g	7.85^h
V4OF1	75.70^ij	110	31.87^j	82.47ⁿ		_2.13defgh	206.67^de	9.19^def
V5OF1	75.70^ij	110	39.73^fghi	110.53^e		_1.93defgh	233.33^c	10.37^c
V1OF2	79.86^gh	110	50.47^abc	108.47^f		_2.27defg	238.33^c	10.59^c
V2OF2	87.50^bcd	110	38.40^ghij	95.53^j		_2.00defgh	320.00^a	14.22^a
V3OF2	93.75^a	110	48.07^abc	103.00^g		_2.60abcdef	186.67^efg	8.30fg^h
V4OF2	86.11^cd	110	39.87^fghi	104.53^g		1.60^gh	210.00^de	9.33^de
V5OF2	84.03 ^def	110	36.13^ij	97.87ⁱ		_2.13defgh	201.67^ef	8.96^efg
V1OF3	78.47^ghi	110	54.73^a	115.13^d		_2.07defgh	226.67^cd	10.07^cd
V2OF3	77.08^hij	110	_41.13efghi	97.67ⁱ		_1.93defgh	203.33^def	9.04^ef
V3OF3	78.50^ghi	110	42.40^defg	85.87^m		_2.80abcd	186.67^efg	8.30^fgh
V4OF3	81.94^efg	110	44.33^bcde	92.53^k		_1.87efgh	176.67^g	7.85^h
V5OF3	73.61^j	110	38.13^hij	113.67^d		_2.00defgh	175.33^g	7.79^h

SPJ with 6t/ha

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Off-site (Bataan)

RESULT OF THE STUDY

Treatment	Percent Survival	Days to maturity	Vine length at 30 DAP	Vine length at harvest	No. of tubers	Wt. of tubers	Yield/ha
C. A X B
V1OF4	79.86^gh	110	48.80^abcd	117.33^c	_2.20defg	240.00^c	10.67^c
V2OF4	79.17^ghi	110	44.20^cdef	104.60^g	_2.47bcdefg	316.67^a	14.07^a
V3OF4	86.81^cd	110	45.60^bcd	87.13^m	3.40^a	273.33^b	12.15^b
V4OF4	79.17^ghi	110	50.87^abc	96.27^ij	3.13^abc	243.33^c	10.81^c
V5OF4	78.47^ghi	110	45.40^bcd	109.73^ef	1.27^h	121.33^h	5.39ⁱ
V1OF5	77.78^hi	110	38.33^ghij	137.53^a	1.73^fgh	310.00^a	13.78^a
V2OF5	84.72^cde	110	40.67^fghi	94.93^j	3.20^ab	270.00^b	12.00^b
V3OF5	90.97^ab	110	45.73^bcd	89.53^l	_2.67abcde	273.33^b	12.15^b
V4OF5	79.86^gh	110	39.87^fghi	103.40^g	_2.33cdefg	233.33^c	10.37^c
V5OF5	79.17^ghi	110	_41.80efghi	97.80ⁱ	_2.27defg	180.00^fg	8.00^gh

SPJ &PSB SP30

with 8t/ha 10t/ha

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Off-site (Zambales)

RESULT OF THE STUDY

Treatment	Percent Survival	Days to maturity	Vine length at 30 DAP	Vine length at harvest	No. of tubers	Wt of tubers	Yield/ha
A. Variety
V1- PSB SP30	87.41^a	110	41.41^b	166.31^a	2.53^b	338.33^c	15.04^c
V2- SPJ	83.95^b	110	46.97^a	162.65^b	2.37^b	562.00^a	25.18^a
V3- Kinerots	49.38^d	110	19.39^e	84.62^e	2.06^bc	227.00^d	10.09^d
V4-Japonita	73.38^c	110	34.17^c	102.16^c	3.34^a	470.00^b	20.89^b
V5- VSP6	44.20^e	110	21.07^d	98.76^d	1.74^c	235.17^d	10.45^d
A. Organic Fertilizers
OF1-2 t/ha	66.42^c	110	34.00^a	126.98^a	2.35	328.22^b	14.85^b
OF2-4 t/ha	68.15^b	110	29.59^c	123.32^b	2.46	386.50^a	17.11^a
OF3-6 t/ha	71.36^a	110	33.97^a	121.36^bc	2.44	375.44^a	16.69^a
OF4-8 t/ha	64.69^d	110	30.75^b	123.41^b	2.43	366.67^a	16.30^a

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Off-site (Zambales)

RESULT OF THE STUDY

Treatment	Percent Survival	Days to maturity	Vine length at 30 DAP	Vine length at harvest	No. of tubers	Wt of tubers	Yield/ha

C. A X B
V1OF4	85.19^cd	110	40.00^f	167.87^b	2.53	343.33^def	15.26^ef
V2OF4	80.25 ^e	110	46.60^bc	164.53^bc	2.60	666.67^a	29.63^a
V3OF4	51.85 ^hi	110	17.00^kl	80.13^k	1.93	203.33^ij	9.04^jk
V4OF4	70.37 ^g	110	32.53^h	102.67^efg	3.47	463.33^c	20.59^d
V5OF4	35.80 ^m	110	17.60^kl	101.83^efg	1.63	156.67^j	6.96^k
V1OF5	93.83 ^a	110	48.00^b	157.53^d	2.27	280.00^fgh	12.45^gh
V2OF5	85.19 ^cd	110	44.00^de	159.33^cd	2.20	536.67^bc	23.85^bc
V3OF5	50.62 ^hij	110	19.53^k	88.30^ij	2.37	268.33^ghi	11.93^ghi
V4OF5	69.14 ^g	110	36.73^g	99.53^fg	2.87	493.33^c	21.93^cd
V5OF5	41.97 ^l	110	25.27ⁱ	93.52^hi	1.53	300.00^efg	13.34^fg

SPJ with 8t/ha

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On-station biopesticide development/ Technology Packaging

STUDY 2 Development of Bio- pesticides for insect pest management for Organic Sweet Potato Production

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Preparation of Plant Materials

Gliricidia sepium

Leaves

1:1 ratio (1 kg of plant part used:1 liter of water)

Capsicum annuum

Fruit

Curcuma longa

Rhizome

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Insect Pest

Insect Defoliators

Cutworm

Webworm

Sweetpotato

Weevil

Sweetpotato

weevil

Infected fruit

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Virus “Kulot”

Infected plant

Infected Plant

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RESULTS

Treatment	Non-marketable Tubers		Marketable Tubers		Computed Yield (t/ha)
Treatment	Number	Weight (kg)	Number	Weight (kg)	Computed Yield (t/ha)
T1 – YG	10.00	0.80	70.33	10.77	10.72
T2 – HP	13.67	2.87	57.33	7.68	9.77
T3 – K	3.00	0.30	69.67	9.77	9.32
T4 – YG + HP	7.00	0.57	59.00	9.70	9.51
T5 – YG + K	11.33	2.02	67.33	10.58	11.67
T6 – HP + K	8.67	1.83	46.33	6.57	7.78
T7 – HP + K + YG	5.00	0.93	56.00	11.07	11.11

Table 1. Yield of organic sweetpotato as influence by different bio-pesticides

Formulation (cutworm)

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Irrigation Frequency/ Technology Packaging

STUDY 3 F

Frequency on

Effect of the Yield

Irrigation of Sweet

Potato under Organic System

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TREATMENTS OF THE STUDY

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RESULTS

PERCENT SURVIVAL
Treatment	7 DAP	21 DAP	45 DAP	Harvesting
No irrigation	19.58 ^c	10.42 ^c	5.00 ^b	0.83 ^c
Irrigate once at 7 days after planting	31.25 ^b	23.75 ^b	13.75 ^a	1.66 ^bc
Irrigate twice at 21 days after planting	46.25 ^a	30.33 ^a	17.08 ^a	3.33 ^ab
Irrigate thrice at 45 days after planting	51.25 ^a	27.50 ^ab	14.16 ^a	4.58 ^a

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RESULTS

YIELD (TONS/HA)
Treatment	I	II	III	Mean
No irrigation	1.78	1.33	0.00	1.04 ^b
Irrigate once at 7 days after planting	1.78	0.00	2.22	1.33 ^b
Irrigate twice at 21 days after planting	4.44	3.56	4.00	4.00 ^a
Irrigate thrice at 45 days after planting	4.44	4.89	5.78	5.03 ^a

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Summary

Area	Variety	Recommended Organic Fertilizer	Yield
On campus (Nueva Ecija)	Japonica Kenerots	4t/ha organic fertilizer + microbials	34.99t/ha (34.94 tons/ha) 19.58 t/ha (18.53 t/ha)
Tarlac	SPJ	4t/ha organic fertilizer + microbials	15.35 t/ha (27.02 t/ha)
Bataan	SPJ	8t/ha organic fertilizer + microbials	11.08 t/ha
Zambales	SPJ	8t/ha organic fertilizer + microbials	25.18 t/ha
Insect Pest Management
Combination of Hot Pepper, Kakawate and Yellow Ginger
Water Management
Irrigate thrice at 25 days after planting

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COST & RETURN ANALYSIS (ON-STATION)

	Quantity	Unit	Rate/unit	Value
I. GROSS INCOME
Production Yield	34,000	kg	10	340,000
II. EXPENSES
A. Labor
Plowing	1	pass	1500	1500
Harrowing(2x)	2	pass	750	1500
Preparation of planting materials	4	MD	250	1000
Planting	8	MD	250	2000
Off -barring	1	MA	500	500
Hillling -up	1	MA	500	500
1st Weeding	10	MD	250	2500
2nd Weeding	10	MD	250	2500
First Application	2	MD	250	500
Second Application	2	MD	250	500
Detopping	3	MD	250	750
Uprooting/bagging	12	MD	250	3000
Cleaning	12	MD	250	3000
B. Materials/ Inputs
Planting Materials	44444	cuttings	0.5	22222
Organic Fertilizer	80	bags	200	16000
Trichoderma	250	kg	50	12500
Hauling	340	sacks	10	3400
C. Others
Irrigation Expenses				3500.00
Interest of Capital				5000
Total Expenses				82372.00
Net Income				257,628
Return to total expenses (%)				312.76
Average cost of production				2.42
Breakeven yield				8237.20

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COST & RETURN ANALYSIS (OFF-SITE)


	Quantity	Unit	Rate/unit	Value
I. GROSS INCOME
Production Yield	18,000	kg	12	216000.00
II. EXPENSES
A. Labor
Land Preparation (Tractor)	1	MD	5000	5000.00
Gayat (Harrowing)	1	MAD	3500	3500.00
Furrow	1	MAD	500	500.00
Planting	7	MD	350	2450.00
Off -barring	1	MAD	500	500.00
Hillling -up	1	MAD	500	500.00
Basal Application	2	MD	350	700.00
Second Application	3	MD	350	1050.00
Balasbas	5	MD	350	1750.00
Tastas	1	MAD	500	500.00
Harvest	21	MD	350	7350.00
Cleaning	10	MD	350	3500.00
B. Materials/ Inputs
Planting Materials	150	bigkis	100	15000.00
16-20-0	2	bags	1300	2600.00
14-14-14	3.5	bags	1130	3955.00
Insecticide (Karate)	1000	li	1	1000.00
Sacks	80	pcs	12	960.00
C. Others
Irrigation Expenses				3500.00
Interest of Capital				5000

Total Expenses				59315.00
Net Income				156685.00
Return to total expenses (%)				264.16
Average cost of production				3.30
Breakeven yield				4942.92

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COST & RETURN ANALYSIS

	Farmers Practice	Organic technology
Expenses	PHP 59,315.00	PHP 82,372.00
Yield	18,000 kg/ha	34,000 kg/ha
Net income	PHP 156,000.00 @ php 12/kg	PHP 257,628.00 @ php 10/kg

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Farmers’ field day,

COST & RE

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Sweet potato Fiesta

Sweet potato magazine

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Cabanatuan

Bulacan

Gapan

Bulacan

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Acknowledgement

The CLSU is very thankful to the Department of Agriculture-Bureau of Agricultural Research for giving the financial support to this project to come-up with the technology on organic sweetpotato production to help our sweetpotato growers in Central Luzon.

Likewise, to the DA-RFO3, Tarlac City, Municipal Agriculturist of Castillejos, Zambales for helping us identifying their organic farmer practitioners who served as our farmer co-operators in this project. The farmer’s participants and beneficiaries of this project. The CLSU administration for supporting our RCD endeavours. To all of you….Thank you very much and may our good LORD bless us all always…..

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THANK YOU