Hi Eric I will send you few papers published by Shahal Abbo on this topic.

regards

Petr

Thanks Petr!  I of course know Shahal's work, but had not seen him quantify yield loss.  Its great that he has.

The following may be of any help.

https://www.researchgate.net/publication/27791897_Determination_Of_Field_Yield_Loss_And_Effect_Of_Environment_On_Pod_Shattering_In_Soybean

http://www.nrcresearchpress.com/doi/pdfplus/10.4141/CJPS07028

http://www.google.co.in/url?sa=t&rct=j&q=&esrc=s&source=web&cd=3&cad=rja&uact=8&ved=0ahUKEwiO9oHkrK7LAhVQGY4KHU91BJQQFggxMAI&url=http%3A%2F%2Fwww.scirp.org%2Fjournal%2FPaperDownload.aspx%3FpaperID%3D16651&usg=AFQjCNHlTBzv0wYb8Are5OltQfQqZCiujQ&bvm=bv.116274245,d.c2E

http://oar.icrisat.org/3414/

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4685391/pdf/srep18835.pdf

http://www.nature.com/ncomms/2014/140219/ncomms4352/full/ncomms4352.html

Article Determination Of Field Yield Loss And Effect Of Environment ...