What is Dura Pisifera and Tenera?

There are three major varieties of oil palm: dura, pisifera, and tenera. The dura palms have kernels with a thick shell, while the pisifera palms have kernels with no shell. The tenera palm is the cross between the two palm varieties (dura and pisifera). It has kernels with a thin shell.

What is Tenera oil palm?

Tenera is the recommended variety grown all over the world. It is cross between thick shelled ‘dura’ (mother palm) and shell less ‘pisifera’ (pollen parent). Tenera (T) has thin shell, medium to high mesocarp content and high oil content.

What is Pisifera?

The Pisifera is a small fruit with no shell. By crossing the Dura with Pisifera a fruit is obtained with a thick mesocarp containing much more oil and fat (chemically saturated oil) than either of its parents. The Tenera nut is small and is easily shelled to release the palm kernel.

What are the characteristics of Dura?

Dura mater is a thick membrane made of dense irregular connective tissue that surrounds the brain and spinal cord. It is the outermost of the three layers of membrane called the meninges that protect the central nervous system. The other two meningeal layers are the arachnoid mater and the pia mater.

Which variety of oil palm is best?

Tenera palms are considered the best palms because:

  • Each fruit produces a large quantities of oil (which is in the mesocarp, the yellow ‘flesh’);
  • The palms produce a large amount of fruit bunches.

What is a Tenera?

Tenera is a genus of moth in the family Gelechiidae. It contains the species Tenera vittata, which is found in the Russian Far East.

What is Dura palm oil?

Oil palm has three naturally occurring fruit forms (dura, pisifera, and tenera) which vary in oil yield depending on the presence and thickness of the distinct lignified shell surrounding the fruit kernel. Dura fruits have a thick shell (2–8 mm) and produce approximately 5.3 tons of oil per hectare per year.

What is dura made of?

It is the outermost layer of the three meninges that surround and protect the brain and spinal cord. The dura mater is made up of fibroblasts and large amounts of extracellular collagen. The dura mater is composed of two layers: the periosteal/endosteal layer and the meningeal layer.

What is dura mater function?

Your dura mater contains a drainage system, called the dural venous sinuses, which allows blood to leave your brain and allows cerebrospinal fluid to re-enter the circulation. Your dura mater receives its blood supply from your middle meningeal artery and vein, and your trigeminal nerve runs through it.

How many years do palm oil trees live?

Oil palm is a perennial crop, with trees potentially producing economically viable volumes of fresh fruit bunches (FFB) over a lifespan of 30 years or so. Peak crop yields are achieved from the age of 9-18, and gradually decline thereafter.

How do you grow Tenera palm oil?

Oil Palm Seedlings

  1. The crop requires 1800-2000 sunlight hours annually, more than 300 cal/cm2/per day, constant sunlight of at least 5 hours per day for better oil palm yield.
  2. Moist, deep and well-drained medium-textured soils rich in humus content are considered ideal for propagation of these crops.

What is the function of dura?