Hi Arshad

I hope these publications will help you

1- "Effects of sowing date and pinching on broccoli seed production"

(A. A. El-Yazied et al., 2007)

for a copy please send a message to my friend hany gamal on his researchgate page

https://www.researchgate.net/profile/Hany_Abd_El-Gawad

2- Effect of head decapitation and planting density on quality seed production

of sprouting broccoli (Brassica oleracea var. italica L.)

(Mehta et al., 2015)

download this link

http://www.ansfoundation.org/Uploaded%20Pdf/71/471-476.pdf

Dear Dr Mohamed,

thank you you so much for your answer I really appreciate it

I hope this can help you

http://www.cabdirect.org/abstracts/20113350452.html

http://www.ansfoundation.org/Uploaded%20Pdf/71/471-476.pdf

http://www.academicjournals.org/article/article1380879204_Udengwu.pdf

http://www.tandfonline.com/doi/abs/10.1080/19315260.2014.937022