1. CHOOSE THE RIGHT
VARIETY
Photo: S.
Palizada

• Consider the local cropping pattern
and crop adaptability to local
climatic condition
• Potential yield
• Maturity and resistance to insect
pests and diseases
• Viability of the seeds - to avoid
thinning and expensive replanting
• Market demand

Corn Varieties
Open-Polllinated
Varieties (OPV):
• IPB Var. 4
• IPB Var. 6
• IPB Var. 9
• IPB Var. 10
• IES- 8906
• VM 2
• USM Var. 10
• USM Var. 5
• TRADITIONAL VARIETIES
•Tacuro , Kabagtik, Tiniguib, etc.
HYBRIDS:
• PIONEER 30M50
• PIONEER 30B80
• PIONEER 30W40
• PIONEER 30B29
• DEKALB 9051
• DEKALB 818
• GSI 40
• CHINESE (ZF)
• ACM 8000

2. LAND PREPARATION

In areas with continuous
growing of corn
• 1st plowing after harvest
• 2nd plowing 14 days prior to planting
• Make furrows at the day of planting 75
cm. apart at 8 cm. depth

• 1st plowing
• 2nd plowing 15 days from 1st plowing
• 3rd plowing 30 days from the 2nd
plowing
• Make furrows a day or at the day of
planting 75 cm apart at 8 cm depth
In newly open areas potential
for corn

3. FERTILIZATION

• Apply recommended rate of fertilizer,
organic + inorganic combination or
inorganic alone
• Based on soil analysis
• For hybrid corn - 96-69-60 kgs NPK/ha
+ 20 bags organic fertilizer
• For OPV - 74-28-28 kgs NPK/ha + 10
bags organic fertilizer

• Basal (at planting)
– 20 bags organic fertilizer
– 3 bags di-ammonium phosphate (18-46-0)
– 1 bag Urea (46-0-0)
Hybrid: Fertilizer Application
time

• Basal (at planting)
• 10 bags organic fertilizer/ha
• 3 bags complete fertilizer (14-14-14)
OPV: Fertilizer application
time

• Cover the fertilizer with thin layer of
soil of about 2 cm (to avoid fertilizer
burn on the seeds)
• Normal soil pH for corn 5.5 - 7.5
• If soil pH is below 5.5, liming is
necessary at 2.0 - 3.0 t/ha to be applied
at least 4 weeks before planting

4. PLANTING

• For Hybrid = 18 kgs. per hectare
• Planting Distance: 20 - 25 cm between hills
at one seed per hill
• 20 cm x 75 cm : 63,333 hills/ha
• 25 cm x 75 cm : 53,333 hills/ha
Seed requirement per
hectare for Hybrid

• For OPV = 20 kgs. per hectare
• Planting Distance : 25 cm per hill at one
seed per hill
• At 10 - 15 days from sowing, apply
insecticide to prevent whorl maggot
Seed requirement per
hectare for OPV

• If the number of growing plants is
beyond the expected, uproot the excess
ones carefully
• Do shallow cultivation or off-barring to
control weeds
5.THINNING,
CULTIVATION AND
WEEDING (20 DAP)

• Apply the remaining dose of
recommended fertilizer 25 - 30 days
after planting (DAP)
• Hilling-up to cover the fertilizer
applied
6. SIDEDRESSING & HILLING-
UP

• Sidedress ( 4 weeks after sowing or at knee
high)
– 2 bags urea (46-0-0)
– 2 bags muriate of potash (0-0-60)
– Mix the fertilizer on the day of fertilizer
application
– Cover the fertilizer right away (to avoid
Nitrogen loss)
Hybrid: 2nd Fertilizer
Application

• 2 bags urea (46-0-0)
• 1 bag complete fertilizer (14-14-14)
• Mix well the fertilizer
• Apply fertilizer 6 c.m. away on both side
of the plants
• Cover the fertilizer by hilling-up
OPV: 2nd Fertilizer
Application

Photo: S. Palizada
• Corn borer infestation
– Apply biological control by using
Trichogramma Cards ( 50 - 100 cards/ha)
– Detasseling 75% ( 3 rows detasseled: 1 row
intact)
– Synchronous planting ( Plant at same time
your neighbor does. Avoid planting late.
7. PEST, WEEDS AND DISEASE
CONTROL

• Spot weeding to control weeds. Take
care not to injure the plants
Weed Control

• Immediately remove and burn infected
leaves or plant parts (Chlorotic streak,
stalk rot, downy mildew, mosaic, etc.)
Disease Control

8. HARVESTING (95-110 days after
planting)
• Harvest at appropriate stage depending on the
maturity of your variety or hybrid
• 90-95 days- early maturing
• 105-110 days- full season
• Ready for harvesting when black layer
develops at the grain’s point of attachment to
the cobs
• Kernels are glazed
• Leaves and husks are dry

9. POSTHARVEST
• After harvest, promptly dry corn ears to 18%
moisture content prior to shelling 2-3 days
• Mechanical drying 6-8 hours
• Dry shelled kernels to at least 14% moisture
content for better storage
• Corn standard that will command a higher
price : 97% purity, 3% immature seeds, and
>5% damage kernels