Apple Tree
Fertilizer Fertilization Point
1. Basal application
of fertilizer – Fertilize before root becomes active
If basal
application of fertilizer is late, risk of defect and epinasty rises since
fertilizer response will appear late.
Excessive
fertilization of poorly decomposed compost or organic fertilizer is the main
cause of nutrient imbalance and salt accumulation.
⇒ Soil application with CERES (4-2-1+70% organic matter)
1000KG/1ha between the time leaves fall and the resting stage.
(Soil application
with 100KG/1ha if NUTRI POWER was not fertilized after harvest)
2. Additional
Fertilizer - Determination must be made according to tree vigor
⇒ For excessive nitrogen, overgrowth, and small fruit
setting amount – Irrigation
with TOP PLANT PKCAB 100KG/1ha.
⇒ When fruit setting amount is large, or when there is a
shortage of fertilizer – Soil
application with NK CALMA 300KG/1ha.
⇒ When fruit setting is normal and fruit vigor is stable -
Soil application with NK CALMA 200KG/1ha
3. Thanksgiving
fertilization – Replenishes consumed nutrients after fruit harvest
Fertilize by
considering the fruit setting amount and tree vigor and skip fertilizing for
trees with strong tree vigor.
⇒ After harvest - Soil application with NK CALMA 100KG/1ha
+ soil application with NUTRI POWER 100KG/1ha
Various
Physiological Disorders and Problems in Cultivation that Occur During Apple
Cultivation
1. Excessive nitrogen
prevention: Vulnerable to succulent growth, defective blooming, defective coloring,
and pests
⇒ Main causes are late basal fertilization and excessive
organic fertilizer -
Soil application
with CERES (4-2-1+70% organic matter) 1000KG/1ha + NUTRI POWER 100KG/1ha during
the resting stage.
2. Standardized fruit
and large fruit production – Activate blooming, pollination, fruit setting
period cell division
⇒ It makes flowers plentiful, flower stalks longer, and
pollen abundant - Foliar spraying with GS-BIG 1000x when flower buds billow,
during full bloom and when flower drops.
⇒ Young fruit period after fruit setting - Foliar spraying
by mixing FRUITFUL 500x + POLY CAB 1000x
⇒ Prevent excessive nitrogen – Soil application with NUTRI POWER 100KG/1ha
3. Russeting prevention – A phenomenon in which cork cell forms due to internal
and external stimulation because the cuticle layer that protects the fruit skin
is in undeveloped state
⇒ Spray POLYCAB within
10 days after flower drops
4. Bitter Pit,
corkspot prevention – Mainly occurs in trees with strong tree vigor, occurs
when calcium content in the fruit skin is lower than 400ppm
⇒ Calcium absorption is fast and the required amount is
large during the young fruit period - Foliar spraying with POLYCAB 1000x + irrigation
with CALSTAR GOLD 30L/1ha
5. Dehiscent fruit
prevention – Mainly occurs at the pedicel part, a symptom due to moisture
unbalance
⇒ Increase the buffer power by improving the physical
property of the soil - Soil
application with CERES (4-2-1+70% organic
matter) 1000KG/1ha in the resting stage
⇒ Make the tissue dense by inducing robust cell division -
Fertilization with GS-BIG 1000x during blooming time
⇒ Make the cell membrane hard - Foliar spraying with
POLYCAB 1000x + irrigation with CALSTAR GOLD 30L/1ha
6. Water core
prevention – Occurs one month before harvest and spreads. Problem in storage
occurs.
⇒ Supply calcium and potassium in a stable manner during
the growing period - Soil application with NK CALMA 200KG/1ha + foliar spraying
with POLYCAB 1000x during the 2nd enlargement stage
7. Coloring is not occurring properly, and sugar content is
dropping.
⇒ Excessive nitrogen during the coloring
period - Foliar spraying with CAP2018 500x or BALANCE PRO 1000x
⇒ While the amount of fruit setting is
large, weak tree vigor is a problem- Foliar spraying with DOUBLE PK 250x + LUK
S 500x
⇒ Sugar content and color enhancement – Foliar spraying with COLOR
MADE 1000x and foliar spraying with COMBI Ⅱ 2000x
8. Cold weather
damage and frost damage prevention and recovery
⇒ If sufficient stored nutrient has not been secured due
to excessive fruition and early defoliation - Soil application with NK CALMA
100KG/1ha + NUTRI POWER 100KG/1ha after harvest
⇒ When occurrence of cold weather damage is expected – Foliar spraying with CWD DOWN 1000x
⇒ When rapid recovery is needed because cold weather
damage occurred – Foliar
spraying by mixing SEAWEED F 500x and RECOVER 1000x
9. Shoot withering,
defective shoot growth and development prevention and recovery: Manage
nutrients
⇒ Deficiency of micronutrients like iron, boron, etc. – Foliar spraying with COMBI Ⅰ2000x
10. Sagging leaf
phenomenon prevention and recovery
⇒ If root is defective during the high temperature period
after the rainy season – Irrigation
with THE ROOTS 30L/1ha
11. Brown spot, early defoliation prevention and recovery
⇒ Malnourished leaf due to provision of
nutrient to fruits during the fruit enlargement period
1st - Foliar spraying with
DOUBLE K 250x +SEAWEED F 1000x
2nd – Foliar spraying with MAG
MICRO 1000x + SEAWEED F 1000x
12. Floral initiation
stage overgrowth prevention and recovery
⇒ Foliar spraying with CAP2018 500x or BALANCE PRO 1000x
13. Sunscald fruit
prevention
⇒ Protect the fruit from
strong ultraviolet rays – Foliar spraying with SUNNY
CAL 1000x +SPEED UP 5000x
⇒ Foliar spraying with
SSR-ALL or MOLD OUT 1000x
⇒ Foliar spraying with
SSR-I(1,2) or JJB GOLD 1000x