Current witness qualification:
Currently, sister Becca Biderman of Ancient Path New Moon is the only barley inspector who seems to understand what a proper wave sheaf is (and why you should not let the true Firstfruits fall to the ground, so you can take your “first” fruits offering from the middle of the harvest, as other groups do).

Disclaimer: For reasons explained in our studies, NI does not support Messianic doctrine. For more on this topic, please see NI’s 2025 explanation in “Babylon Mystery Calendars“.) However, Becca documents her barley inspections, and her definitions of aviv barley seem accurate according to our understanding of Scripture. 

Other barley groups:
There are several other (Amalekite) barley groups whose work we cannot recommend in any way. They ignore Deuteronomy 16:9, they define “Firstfruits” as a random sheaf from the middle of the harvest, and they add rules and definitions that Yahweh does not add. They are seemingly always a month (or sometimes two months) late.

New moon witnesses:
Several groups sight the first crescent sliver of the new moon well. Various new moon witnesses are recorded each month in the new moon reports. Again, as far as we can tell, only sister Becca Biderman publishes accurate barley reports. 

Declaring Rosh HaShanah at the correct time:
As we explain in our studies (see list above), there only needs to be enough aviv barley ready for the omer (wave sheaf) Firstfruits offering by either the 15th or the 21st day of the first month. As explained in these studies, it is a disaster if we declare Rosh HaShanah too late, because it would force farmers in the land of Israel who have the earliest ripening barley to do one of two things: 

A) Either they must break Devarim (Deuteronomy) 16:9 and begin harvesting their crop BEFORE the Firstfruits offering has been presented unto Yahweh for the nation. Or 
B) Lose all or part of their barley crop, while they wait an extra month for the leaders to declare Rosh HaShanah!

By declaring the true Firstfruits unto Yahweh Elohim as He commands, and keeping His appointed days according to His perfect timing, the farmers do not need to lose their crops; neither are they encouraged to break any of Yahweh’s commandments.

For studies on declaring Rosh HaShanah, aviv barley, and the Torah Calendar, please see section 2a. 
For more on the current barley inspections and various calendar news, please visit NI Torah Calendar News.