Hazelnut varieties are grown in our country according to fruit shape and properties are collected in three groups.

THE ROUND HAZELNUTS
SHARP HAZELNUTS
ALMOND HAZELNUTS

Types of Groups in Round Hazelnut:
a.Plump hazelnut: The most important types of nuts in our country is growing. Rather, as widely grown in the Giresun province is. Fruit quality is very good in the international markets simply have to hold the world and the Turkish hazelnuts has become the country is called by. Showing the type of features plump hazelnuts Periyodisite good condition and well cared for garden each year and regularly gives very high efficiency. Mature, and regular-shaped fruit is plump. Fruit is grooved on the obvious. The average length of 17.58 mm. 17.04 mm and width. The efficiency is % 50-52 of plump hazelnuts. Shell open, bright, brown, half from the end of the average flock to off-white shell thickness 1.10 mm. and are fragile. Tray is large, splayed, middle of the fluffy, fruit on the one hand, this part is to stop aslope. Internal fruit cortex (testa) light brown, shiny, smooth, thin, light streaked on meat and are cohesive. Fat to a high mechanical resistance to reduce pressure and easy to cause corruption. Therefore, breaking, packaging, storage and in transit is needed to be careful.
b.Palaz Hazelnut: Taste and quality rather than the middle of that kind of hazelnut in Ordu province is to become widespread. The fruit from the very large chubby plump hazelnuts, round and flattened, the table is large, extreme is downy side. 16. Average shell thickness of 1.66 mm. and easily breakable.01 mm average. length and 19.26 mm. width of the fruit shell is opaque brown color. Internal fruit on the coffee-colored, thin and adherent to the membrane is not. Fruit is white and the belly cavity is relatively large. 600 - 650 pieces 1kg shelled hazelnuts. come and efficiency of 49-51%, fat ratio is 64-68And face more side rooted to the soil depth of less than improved, clay, sand and gravel in the soil can be cultivated even. Than other types of nuts in the spring before the freeze for more than awaken more insect damage and fruit loss is suffered.
c. Hazelnut Foşa: Grown more in the Trabzon region is large and ostentatious kind of a nut. Shell reddish-kahverenkte, average 1.20 mm. thickness and mid-grade is hard. Average 17.87 mm. width has shelled fruit. Internal fruit dice dark brick, brown, on the coarse-grained, thickish, not attached to fruit, ivory in color, rough, and is larger inside the belly cavity, the well-filled fruit shells. Internal efficiency and oil rate is of 50-53% 66.69%.475-550 of this kind of narrow tray unit is 1kg shelled fruit.
d. Hazelnut Çakıldak: Army to become widespread in the province of this kind of nuts in the Western Black Sea region are recognized by name and Delisava are produced in large extent.
 Wake up much later to other kinds of nuts that late spring frost damage is less than all kinds of weather and soil conditions are easily able to meet is very high efficiency of this type. Flavor of the fruit is quite large and relatively long and the quality is not good. Fruit shell open brown, 1.2 mm. in thickness and are fragile. Tray portion broad, flat and made out relatively camber. Inside the well filled with fruit shell. Be attached to fruit, and the remaining dice are streaky. Fruit flesh ivory color, crisp and hub of the space is very large. Length and width of 17.76 mm 18:41 mm shelled fruit is average. One is 1kg shelled hazelnuts 580-610.
e. Hazelnut Kalınkara: Other varieties of hazelnuts grown difficult even in the weak soil easily grow easily in this kind of hazelnut in hazelnut orchards are common and life is less. Shell dull, dirty brown color, and break down and head is covered with the base. Fruit of the round, fluffy, and this part of the center of the tray on the fruit can be prone to stop. Attached to the inner fruit of the fruit, thick membrane is rough and dark brown. Opaque white color and the fruit flesh is crisp and quick for the big belly of space is distorted. Average 1.3 mm in thickness as shell of this nut-shelled fruit varieties 19.27 mm in length and width of 19.03. 450-525 pieces 1kg shelled hazelnuts comes. Internal 30-44% of the fruit to be twins, and reduce unwanted commercial value to this feature.
f. Hazelnut Kargalak: Are grown in very large part due to Trabzon and Hopa is a kind of hazelnut. Shell is thick and low culture do not drink to fill, even if less in hazelnut orchards had been found. Shelled fruit tray from end flattened and averaged 18.58 mm. length and 23.75 mm. in width. The shell is very thick and hard 1.33 mm average in thickness. Internal fruit is on a thick, brown membrane is. Fruit flesh white, crisp, belly cavity is large and easily damaged. 340-370 pieces  shelled hazelnuts is 1kg.
g. Hazelnut Uzunmusa: More space in the Army are trained in local varieties of these nuts big, plump, thin-shelled, is very efficient and high quality. Average 0.99 mm reddish brown fruit shell in thickness and has jut out tray. Shelled fruit average 18.85 mm. length and 17.52 mm. in width. Internal fruit fills out the shell. Internal fruit to be attached on top of a thin, shiny and smooth membrane is. The inner flesh of fruit suitable for whitening white, crunchy, delicious, and the belly cavity is small. 620-670 piecesshelled hazelnuts is 1kg.
h.Mincane hazelnut: Trabzon have been cultivated in the regionEfficiency is low and periyodisite. Relatively open to outside of the brown shell and the tray is out. Average shell thickness of 1.2 mm. and is easy to break. Shelled fruit average 18.96 mm. length and 17.50 mm. in width. Inner membrane open fruit-colored, thin, white pulp, crispy, and the belly cavity is relatively large. 730-760 piecesshelled fruit is 1kg.
ı.Cavcava hazelnut: This area has very few are cultivated varieties of hazelnut brown shell, the average 0.9-1 mm. in thickness. Tray is protruding out of these kinds of hazelnuts shelled fruit average 18:46 mm. length and 17:33 mm. in width. Fruit and brown on the inner membrane is thickly. Fruit flesh is ivory color and sizeable belly cavity. 700-780 units of shelled hazelnuts is 1kg.
i.hazelnut blood: This is very delicious varieties of hazelnut shell, dark red - brown in color. The hazelnut orchards in the region where relatively Trabzon had been found.   Average shell is thickness of 0.9 mm. Attached to the fruit of inner and red, thick membrane is. Fruit flesh ivory color, crisp and hub of the space is. 680-715 pieces of shelled fruit İs 1kg.

Sharp Hazelnut Varieties
a.Hazelnut Sharp: Almost all regions produced hazelnut hazelnut varieties that had been encountered. Mature fruit basıkca from both sides, is long and pointed. Fruit shell bright, light brown, dirty white downy head relatively average 1:05 mm. thick and brittle. Jut out tray, and fruit can not stand upright on this part. Shelled fruit average 20.71 mm. length and 14.88 mm. in width. Internal fruit on the thin membrane, to be attached, and on open-grained brown to bright. Fruit is sweet and crunchy flesh is ivory in color. Umbilical cavity is relatively large. 580-650 pieces of shelled hazelnuts is 1kg.
b.Hazelnut Thinblack: Other kinds of nuts in the garden where hazelnut is produced by this kind of occurrence is low soil-At even can be grown easily. Is small and fluffy on the outside table. Fruit of the tip of a larger place in the pile layer is occupied. Shell color is dull and dark coffee. Fruit is large and sharp. Shell thin and 0.96 mm is in thickness. Brittle shell of this kind of fruit sloughy 21:19 mm. length and 17:47 mm. İs in width. Well suited to the inner shape of fruit shell, not attached to fruit, and brown remaining dice are available. Fruit flesh crisp, ivory color and the belly is bigger gap. This kind of nuts to create the mirror more than nuts and this feature is not desirable to reduce the commercial value.
c. Hazelnut Pain: Yield and low quality of the fruit of that age is kind of nuts are bitter. Shell is indented protrusive this type of hazelnut, beaked hazelnut, and more broadly than is the large flat. Inside the fruit and the remaining membrane is brown on. Fruit flesh is dirty white, medium-sized space in the belly is.
d.Hazelnut bird: Very similar to that of hazelnut beaked hazelnut varieties and the shell thin and flat tray by birds took this name for the frail and efficiency is very low. Shell light brown, average 1.1 mm. thickness, fruit and 19.08 mm. length and 16.28 mm. in width. Fruit of the end of the layer is off-white fuzz. Internal fruit color on the membrane is thin and brown and the belly open space is big.

Almond Hazelnut Group Variants:
a.Round of Almond Hazelnut: Fruit is very long and sharp, these are thin shells of hazelnut varieties. Shelled fruit average 24.35 mm. length and 15:14 mm. 1mm width and thickness of the shell. to around. Fruit is long and cylindrical with one end pointed ends. Tray was a flat camber out partially. Brown on the inner membrane is fruit, fruit flesh is crisp and the belly cavity relatively large.
b.The flat almonds hazelnuts:
Very low yield of the fruit of that kind of nuts and is very long as each side is receding from. Fruit tray, and then shelled to expand from a narrow end with a bang ends. Shell glossy brown, average 1.3 mm. and 24.45 mm in thickness. length, 14.93 mm. in width. How to adapt to the inner shell of fruit on the brown, thickly covered with a membrane is. Interior space is quite big belly of the fruit.
c.Hazelnut Değirmendere: Consumed as fresh, large, thick-shelled, forward and is very tasty but rather a kind of nuts are grown around İzmit.