Cashew (Anacardium Occidentale L.) is a tree crop of considerable economic importance to Nigeria and other tropical countries. Apart from being a source of useful products and byproducts for food, medicinal and industrial applications, cashew gives also a useful shade, while ornamental and alley trees are suitable for the control of soil erosion, particularly for the protection of watersheds and dams.

Harvest

Cashew nut setting begins in the middle of dry season, while harvesting takes place mainly in February or March. The entire harvest period occupies about 16 weeks. In the Eastern and Western parts of the country, where quality cashew nuts are grown, nuts are allowed to drop to the ground before they are collected. This practice ensures that only ripe nuts are collected. Nuts normally fall to the ground with their apples attached; the two are normally separated with a twisting action during collection. The remnants of the apple flash adhering to the nuts are removed with a sharp knife. After picking, the nuts are dried in the sun for 2 to 3 days, to reduce their moisture content to about 12 %. Properly dried nuts are packed in jute bags and can be kept for 6 to 10 months, if stored in suitable condition.

Specifications

According to SGS (quality inspectors), the standard for raw cashew nuts, unshelled, is specified as follows:
i. Nut count 180-200 per kg
ii. Moisture content 8-10% max
iii. Defective nuts 15% max
iv. Float Rate 18% max
v. Admixture 0.25% max
vi. Foreign matter 0.25% max
vii. KoR, or shelling out-turn 48-50 Ibs/bag
(Obiazu, P. C.,(2000) ‘Quality Requirements for Nigeria Agricultural Products’. Unpublished Seminar Paper.)

Uses

The cashew nut is a popular snack, and its rich flavor means that it is often eaten on its own, lightly salted or sugared. In addition to this, cashew nutshell liquid (CNSL), a by-product of processing cashew, is mostly composed of anacardic acids. These acids have been used effectively against tooth abscesses due to their lethality to bacteria.

1. Out-turn / Yield
It is the quantity of cashew kernel that can be obtained after decorticating (remove the shell of a cashew nut) 80 kg of raw cashew nuts. The count is in pounds per 80kg.
A good out turn is from 43 to 48 lbs
An excellent out turn is from 48 to 55 lbs

2. Nut count
It is the number or raw cashew nuts per kg
170 excellent
180-190 very good
190-200 good
200-210 middle
210-220 low middle
230 limit acceptable
lower: poor
Please note that:
– It is necessary to balance this information with the out-turn
– In West Africa most of the raw cashew nuts, depending the year, have a nut count from 190 to 210.

3. Moisture / Humidity For export 12% and less otherwise there are risks for the goods during the shipping
4. Foreign matter: 5% max
5. Defective: Lower than 10%
6. Float Rate: This is the total number of cashew nuts that will float when poured into water. A good float rate is 18% max