Cashew Nut

By Tamilnadu Treepedia on 11 Aug 2018




General Information :

•    It is a medium-sized tree, spreading, evergreen, much branched.•    Leaves are spirally arranged green in color.•    Flowers are Pale green to reddish in color•    Fruit is a Psedocarp, pearshaped.•    The true fruit is single seeded.

Distribution :

  • It is cultivated widely throughout the tropics for its kernels.

Habitat : Dry deciduous forestSoil : Prefers deep, fertile, sandy soils but will grow well on most soils except pure clays or soils that are otherwise impermeable, poorly drained or subject to periodic flooding.Soil pH : 4.3 to 8.7Altitude : Up to 1000 m (MSL)Rainfall :500-3500 mmTemperature : 17-38°CTerrain : Plains/Coastal plainsTree Characteristics :
  • It  requires high temperatures; frost is deleterious. Distribution of rainfall is more important than the amount of it.
Habit : Evergreen tree
Natural Regeneration :

  • Natural regeneration by coppice.

Artificial Regeneration :

  • Propagation is generally by seeds and vegetative from grafting, air-layering or inarching.

Seed collection and Storage :

•    Seed collected during Apirl –May•    Freshly collected seeds are stored in guny bags for 8 months.•    Medium sized nut are best for regeneration.•    Germination capacity is 70 – 80%•    Seeds 150 to 200 / Kg.

Seed Treatment :

  • No pretreatment is necessary.

Nursery Technique :

•    Soft wood grafting is most successful and commercially viable technique, giving 70% success rate. •    It is similar to that of epicotyl grafting, except the age of the rootstock.

Plantation technique :

•    Pits are completely with top soil mixed FYM.•    Planting done after the onset of monsoon, plant the graft in the center of each pit and support it with appropriate staking.•     Take care that graft union is 10 –15 cm above the ground level. •    Ensure regular removal of side shoots arising below the graft joint.•    Normal planting in Square system: Pits of 60 cm X 60 cm X 60 cm size at a spacing of 7m X 7 m. (204 grafts / ha).•    High density Planting in square system: Pit of 60 cm X 60 cm X 60 cm size at a spacing of 5m X 5m ( 400 grafts / ha)

Care & Disease Control :

•    Allow the trunk to grow up to a height of 1 m by removing side branches.•     Prune the dried, diseased and chris-crossing lower branches every year.

Recommended Harvest :

•    Cropping starts from 4th year.•    The harvesting commences from February and continues till May.

Yield :

•    About 10 – 15 kg per tree (2- 3 tonnes/ha) of raw nut yield may be expected from 10th year onwards, •    About 70 – 100 kg per tree (15 –20 tonnes/ ha.) of cashew apple yield can be expected.

Agro Forestory :

Intercropping: 

  • Has been intercropped with cowpea, groundnuts and horsegram in India

Major uses :

•    It is cultivated for its Nuts•    The cake remaining after oil has been extracted from the kernel serves as animal food. •    Seed coats are usedas poultry feed.•    Wood is used for making wheel hubs, yoke, fishing boats, furniture, false ceilings and interior decoration.

Other uses :

Fodder:  The cake remaining after oil has been extracted from the kernel serves as animal food. Seed coats are used as poultry feed. Fuel:  The wood is popular for firewood and charcoal. The residue of the shell is often used as fuel in cashew nut shell liquid extraction plants. Fibre:   Pulp from the wood is used to fabricate corrugated and hardboard boxes.

Market details :

  • The raw cashew nuts fetch a price of Rs.65-70 per kg in the internal market, and Processed cashew nuts fetch a price of Rs.480.00 per kg.