Dear Marziye Yousefi,

I suggest you to see links and attached file on topic.

Onion Harvesting machines: Topping windrowing, loading, grading ...

https://www.ics-agri.com/onion-equipment-harvesting-storing-han...

assessment of the postharvest systems and losses of bulb onions in ...

https://www.researchgate.net/.../328331412_ASSESSMENT_OF_T...

Patently Good Ideas: Innovations and Inventions in US Onion ... - Jstor

https://www.jstor.org/stable/23145818

Minimizing postharvest losses in onion through effective handling ...

https://www.bar.gov.ph/.../news.../5157-2014-01-onions-postharve...

Assessment Studies on Food Losses/Wastes in the Philippines*

61.63.232.42:38131/.../2%20SR_2016_C_S3-07_Dr.%20Amelita...

Best regards

I have no idea about this topic

Dear Marziye Yousefi,

I suggest you to see this link

Conference Paper Onion: harvesting and post-harvesting mechanized operations.

Best regards

Mam, one suggestion in my knowledge similarly like turmeric harvesting process using mechanical system

turmeric ploughing with hooper system. simple process

thank you for your attention and responds.

Best

good morning mam,

i will collect all details after send to you .

dry onions or wet onions.

machines etc

thanks for this quetion.

in Algeria we have also this problem, because these kind of machine is heavy but our soil is sandly so the machine could stopped by the sand