This is a copy of Resolution No. 15 adopted at Meeting No. 171 of the Board of Directors of the İzmir Commodity Exchange, held on January 14, 2026.
2025-2026 Season — Cotton Ginning Yield and Loss Rates
Cotton Ginning Yield and Loss Rates
It has been resolved to redetermine, exclusively for the area of operation of our Exchange and for the 2025-2026 season, the ginning yield rates required for agricultural withholding tax calculations relating to lint cotton registrations submitted to our Exchange, as well as the loss rates applicable to machine-harvested cotton.
It has been resolved that the cotton ginning yield rates specified below shall be taken as the basis according to the rollergin-rotobar and sawgin ginning systems, and that agricultural withholding tax controls conducted during registration procedures shall be calculated on the basis of these rates.
Cotton Ginning Yield Rates
| CLASS | TYPES | ROLLERGIN-ROTOBAR SYSTEM | SAWGIN SYSTEM |
|---|---|---|---|
| WHITE | Standard 1 | May vary between 37% and 41%. | May vary between 36% and 40%. |
| Standard 2 | May vary between 35% and 40%. | May vary between 34% and 39%. | |
| Standard 3 | May vary between 33% and 38%. | May vary between 32% and 37%. | |
| Standard 4 | May vary between 30% and 36%. | May vary between 29% and 35%. | |
| SPOTTED | Standard 1 | May vary between 36% and 40%. | May vary between 35% and 39%. |
| Standard 2 | May vary between 35% and 38%. | May vary between 34% and 37%. | |
| Standard 3 | May vary between 34% and 37%. | May vary between 33% and 36%. | |
| Standard 4 | May vary between 32% and 38%. | May vary between 31% and 37%. |
Cotton Loss Rates
It has been accepted that the loss rate occurring during the storage of seed cotton ranges between 2% and 5%.
It has been resolved that the loss rate for machine-harvested cotton shall be set between 5% and 10%.
It has been accepted that the trash loss rate occurring during the processing of hand-picked seed cotton ranges between 2% and 6%.
It has been accepted that cottonseed may incur losses of up to 2% to 5%, depending on storage duration and conditions, due to the presence of sand, dust and moisture.
It has been resolved that a loss rate of between 2% and 4% shall be deducted for baled cotton to be stored, depending on storage duration and conditions.
This is a copy of Resolution No. 7 adopted at Meeting No. 226 of the Board of Directors of the İzmir Commodity Exchange, held on June 8, 2022.
Olive Yield and Loss Rates
A-) Brined Black Olives
| PROCESS TYPE | OLIVE VARIETY | FINISHED PRODUCT LOSS (%) | RAW MATERIAL LOSS (%) |
|---|---|---|---|
| Untreated Black Olives | Gemlik | 16% - 18% | 8% - 10% |
| Uslu | 16% - 18% | 8% - 10% | |
| Memecik | 12% - 14% | 10% - 12% | |
| Ayvalık | 10% - 12% | 8% - 10% | |
| Treated (Lye-Cured) Black Olives (Confit) | Memecik | 14% - 16% | 8% - 10% |
| Ayvalık | 14% - 16% | 6% - 8% | |
| Uslu | 14% - 16% | 8% - 10% | |
| Gemlik | — | 6% - 8% | |
| Manzanilla | 12% - 14% | 6% - 8% |
B-) Brined Green Olives
| PROCESS TYPE | OLIVE VARIETY | FINISHED PRODUCT LOSS (%) | RAW MATERIAL LOSS (%) |
|---|---|---|---|
| Lye-Cured Green Olives | Domat | 10% - 12% | 8% - 10% |
| Memecik | 10% - 12% | 8% - 10% | |
| Yamalak Kabası | 16% - 18% | 10% - 12% | |
| Ayvalık | 10% - 12% | 8% - 10% | |
| Manzanilla | 8% - 10% | 8% - 10% | |
| Slit Olives | Ayvalık | 10% - 12% | 8% - 10% |
| Domat | 10% - 12% | 8% - 10% |
C-) Dry-Salted Olives
| PROCESS TYPE | OLIVE VARIETY | FINISHED PRODUCT LOSS (%) | RAW MATERIAL LOSS (%) |
|---|---|---|---|
| Natural Dry-Salted Olives | Gemlik | 26% - 28% | 8% - 10% |
| Uslu | 26% - 28% | 8% - 10% | |
| Memecik | 26% - 28% | 8% - 10% | |
| Ayvalık | 26% - 28% | 8% - 10% | |
| Treated (Lye-Cured) Dry-Salted Olives (Greek Style) | Gemlik | 26% - 28% | 8% - 10% |
| Uslu | 26% - 28% | 8% - 10% | |
| Memecik | 26% - 28% | 8% - 10% | |
| Ayvalık | 26% - 28% | 8% - 10% |
D-) Stuffed Olives
| PRODUCT TYPE | FINISHED PRODUCT LOSS (%) | RAW MATERIAL LOSS (%) |
|---|---|---|
| Pepper-Stuffed Olives | 10% - 12% | 22% - 26% |
| Almond-Stuffed Olives | 10% - 12% | 22% - 26% |
| Carrot-Stuffed Olives | 10% - 12% | 22% - 26% |
E-) Olive Paste
| PRODUCT TYPE | FINISHED PRODUCT LOSS (%) | RAW MATERIAL LOSS (%) |
|---|---|---|
| Olive Paste | 10% - 12% | 44% - 52% |
F-) Pitted Olives
| OLIVE VARIETY | FINISHED PRODUCT LOSS (%) | RAW MATERIAL LOSS (%) |
|---|---|---|
| Domat | 10% - 12% | 36% - 38% |
| Memecik | 10% - 12% | 36% - 38% |
| Manzanilla | 10% - 12% | 36% - 38% |
Olive Oil Loss and Wastage Rates
Loss and Wastage Rates Arising During Olive Oil Production Stages
| PRODUCTION STAGE | LOSS AND WASTAGE RATE (%) |
|---|---|
| Transportation of harvested olives | Minimum 2%, maximum 5% |
| Leaf removal and washing | Minimum 1%, maximum 5% |
| Transportation | 0% - 1% |
| Storage of olive oil | Minimum 0%, maximum 2% |
| Filtration and packaging of extra virgin and virgin olive oils | Minimum 1%, maximum 5% |
Loss and Wastage Rates Arising During the Olive Oil Packaging Process
| PACKAGING STAGE | LOSS AND WASTAGE RATE (%) |
|---|---|
| Oil loss during the packaging process | Minimum 0.5%, maximum 3% |
| Metal packaging materials | Minimum 0.2%, maximum 3% |
| Glass packaging materials | Minimum 0.5%, maximum 3% |
| PET packaging materials | Minimum 1%, maximum 3% |
| Other packaging materials | Minimum 1%, maximum 5% |
Loss and Wastage Rates Arising During the Olive Oil Filtration Process
| FILTRATION STAGE | LOSS AND WASTAGE RATE (%) |
|---|---|
| Filtration of virgin oils by decantation or sedimentation | Minimum 1%, maximum 2% |
| Filtration of virgin oils using paper filters | 0.5% |
| Filtration of virgin oils using earth filters | Minimum 0.5%, maximum 1% |
Loss and Wastage Rates Arising During the Olive Oil Refining Process
| REFINING TYPE | PROCESS STAGE | LOSS AND WASTAGE RATE (%) |
|---|---|---|
| Physical Refining | Washing / pre-cleaning | 0.5% |
| Degumming (removal of gums) | 0% | |
| Bleaching (color removal / lightening) | Minimum 0.5%, maximum 1.5% | |
| Deodorization (acid and odor removal) | Minimum 5.25%, maximum 5.7% | |
| Chemical Refining | Washing / pre-cleaning | 0% |
| Degumming (removal of gums) | Maximum 1% | |
| Neutralization (acid removal) | Maximum 10% | |
| Bleaching (color removal / lightening) | Maximum 0.5% | |
| Deodorization (odor removal) | Maximum 0.5% | |
| Vacuum system water and separator washing water | Minimum 0.2%, maximum 0.5% | |
This is a copy of Resolution No. 10 adopted at Meeting No. 52 of the Board of Directors of the İzmir Commodity Exchange, held on May 14, 2014.
Loss and Yield Rates for Lamb Liver and Tail Fat
Loss and Yield Rates for Lamb Liver and Tail Fat
Pursuant to Article 37 of the Exchange Transactions Regulation, and following an assessment conducted taking into account the opinions of the relevant professional committees, it has been resolved that the following rates shall apply to sales of lamb liver and tail fat.
| PRODUCT / PROCESS | LOSS AND YIELD RATE |
|---|---|
| Liver yield from live lambs | Between 4% and 6% of body weight |
| Loss rate for lamb liver | Between 4% and 5% |
Tail Fat Yield Rates
The amount of tail fat obtained from live lambs raised in the Aegean Region varies depending on the breed and weight of the lamb.
| LAMB BREED | TAIL FAT YIELD |
|---|---|
| Karaman Lamb | Between 2 and 3 kg |
| Kıvırcık Lamb | Between 300 and 800 grams |
It has been resolved that the figures specified above shall be accepted as the applicable loss, wastage and yield rates.
Agricultural withholding tax checks performed during registration procedures are calculated based on these values.
