Mr. Rodrigo Bongolan

Climate Change
most serious
threat of the world
Due to greenhouse
gases emitted
from human
activities

Global
warming
Floods
Droughts

• Compromises food production
of the country esp. in the Ilocos
region.
• Since agriculture is the most
important sector of the economy
that is highly dependent on
climate.

With the present environmental
scenario, it is necessary to
identify agricultural crops and
production systems that are
suited to the locality and have a
potential to sequester CO2
the atmosphere.
from

To determine and compare
short-duration pigeon pea (ICPL
88039) and mungbean as to the:
amount of carbon dioxide
sequestered
agronomic characteristics

interaction effects of
production systems, planting
distances and seeding rates
economic performance as to
net income and return of
investment (ROI)

Independent Variables
Short-duration Pigeon pea
(ICPL 88039)
Production System
Monocropping
Row intercropping
Planting Distances
20 cm x 50 cm
30 cm x 50 cm
20 cm x 70 cm
30 cm x 70 cm
Planting Density
2 seeds/hill
3 seeds/hill
4 seeds/hill
Dependent Variables
Carbon Sequestration
Agronomic
Performance
‣Yield
‣Growth
Economic Potential
Land Equivalent Ratio
(LER)

Santiago, Ilocos Sur, Philippines

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FC FC FC FC FC FC
FC FC FC FC FC FC
Experimental Design: 2 x 4 x 3 in Split Split Plot Design
Treatments:
Main Plot – Production Systems Sub Plot – Planting Distances Sub sub Plot – Seeding Rates
A1 – Monoculture B1 – 20 cm x 50 cm C1 – 2 seeds/hill
A2 – Intercropping with mungbean B2 – 30 cm x 50 cm C2 – 3 seeds/hill
B3 – 20 cm x 70 cm
C3 – 4 seeds/hill
B4 – 30 cm x 70 cm
FC – Floating Control
Experimental Layout of the Study.

Land Preparation
Conventional tillage
method
Seed Requirements
2 ½ kg of pigeon pea
1 kg of mungbean
Seed sowing
Based on planting
distance and seeding
rates
4-5 cm deep

Irrigation
Prior to seed sowing
Early growth
Early podding stage
Weed
Management
20-30 DAP
50-60 DAP
Pest and Disease
Management
Flower initiation
Early podding stage

Harvesting
‣ manual picking
‣ 75% of the
pods were
matured

Carbon Sequestration
Walkley-Black method
Oven-dried samples/treatment
Computation:

Data Gathered:
A. Agronomic Parameters
‣ Plant Height at Maturity
‣ Days to Flower
‣ Days to Maturity
‣ Yield/ha

B.
CO2 sequestration
C. Land Equivalent Ratio
(LER)
D. Economic Parameters
‣ Net Income (Php)
‣ Return of Investment

1. Intercropped pigeon peas at 4
seeds/hill registered the highest
amount of CO2 sequestered at a
rate of 13.25 t/ha which was
comparable to monocropped
pigeon peas with a mean of
13.24 t/ha.

2. Monocropped pigeon peas at a
seeding rate of 4 seeds/hill in a
planting distance of 20cm x 70cm
and 30cm x 50cm produced higher
yield with a mean of 1,032.81kg/ha
and 1,000.00 kg/ha, respectively
which was significantly higher when
compared to intercropped pigeon
peas.

3. A maximum seeding rate of 3
seeds/hill at a planting distance
of 30cm x 70cm planted in
monocropping system produced
taller pigeon peas of 144.53cm
which was significantly higher
when compared to intercropped
pigeon peas.

4. Pigeon peas planted 4 seeds/hill
were found to be the earliest to flower
(48.69 days) and mature (76.69 days).
5. Higher LER was computed for pigeon
peas planted 2 seeds/hill at 20cm x
70cm planting distance having a value
of 1.44. This means that
intercropping is more efficient than
monocropping system.

6. Monocropped pigeon peas generally
generated higher net income and
positive ROI as compared to
intercrops. Further, higher number of
seeding rate of 4 seeds/hill at 30cm x
70cm obtained the highest income of
Php 42,318.60 with an ROI of 2.154.
However, all treatment combinations
have a positive income and ROI.

1. A substantial amount of carbon
dioxide was sequestered by
pigeon peas at 4 seeds/hill
regardless of planting distances.
2. Monoculture of pigeon peas at 4
seeds/hill produced the highest
yield.

3. Pigeon peas planted at 4 seeds/hill
have flowered and matured earlier.
4. Pigeon peas in the 20cm x 50cm,
30cm x 50cm and 20cm x 70cm at 2
seeds/hill and 30cm x 70cm at 3 and
4 seeds/hill have comparable land
equivalent ratio (LER).

5. Highest net income and return
of investment was observed on
monocropped pigeon peas
planted 20cm x 70cm at a
seeding rate of 4 seeds/hill.

1. Short duration pigeon pea is a
potential sequestrant of carbon
dioxide, positively increased farmer’s
income and food supply, thus
planting of pigeon pea is
recommended;
2. 4 seeds/hill in monocropping system
for higher yield.

3. 20cm x 50cm, 30cm x 50cm
and 20cm x 70cm at 2
seeds/hill and 30cm x 70cm
at 3 and 4 seeds/hill in
pigeon pea production for
higher land equivalent ratio
(LER).

4. Highest net income and return of
investment (ROI) was observed
on monocropped pigeon peas
planted 20cm x 70cm at a
seeding rate of 4 seeds/hill,
hence, it is also recommended.

5. The same research endeavors should be
conducted using other agricultural crops
and locations to validate and generate a
more conclusive results.
6. Moreover, conduct of study on delaying
or minimizing the release of CO2
sequestered by pigeon pea after
harvesting.

Comments and suggestions are welcome…
RODRIGO L. BONGOLAN JR.
Agusan del Sur State College of Agriculture and Technology
Mobile No.: 09059232730
Email Add: bhongski11277@yahoo.com