When AgriCraft-1.7.10-1.3.1 is used in conjunction with the plantmegpack mod version 4.23 for 1.7.10, the following crash occurs :

Caused by: java.lang.NoSuchFieldError: seedBeet
at com.InfinityRaider.AgriCraft.reference.SeedInformation.init(SeedInformation.java:91)

see also :

http://pastebin.com/UpV9BkuF

Not sure which mod is at fault though...

Has been fixed long time ago, either rollback pmp or wait for my new release