The All Blacks squad will assemble on Wednesday this week for a two-day camp on Auckland's North Shore minus the eight players in the Crusaders, who will be preparing for this weekend's Super Rugby Final. In their absence, a number of other players will be brought into the camp: hookers Harris and the Hurricanes' Motu Matu'u; props Pauliasi Manu from the Chiefs and Highlander Kane Hames; Hurricanes lock Jeremy Thrush; loose forwards Liam Squire from the Chiefs and Shane Christie from the Highlanders.
All Blacks coach Steve Hansen said the selectors had faced a difficult task in trimming the squad down to 31.
"In doing so, we had to leave out players who are performing at a very, very high level and they could consider themselves unlucky not to be selected. But while we feel for those guys, unfortunately, we have to make the hard decisions."
Hansen also said the selectors had been hugely impressed with the way the All Blacks players had been playing in the last month for their Investec Super Rugby teams and it augured well for the Investec Rugby Championship.
"We are now looking forward to bringing the players together and building on the progress we made in the Steinlager Series against England.
"The Investec Rugby Championship gives us the next opportunity to see where we are at and it doesn't get much bigger than back-to-back Bledisloe Cup tests to kick it off.
"It's going to be another intense competition. South Africa and Australia are ranked second and third in the world and both had successful June test series, while Argentina will again bring the physicality and passion which we know they are renowned for. They will also bring the knowledge and experience which comes from playing in The Rugby Championship and we are expecting them to improve further."
The squad features representation across all New Zealand's Super Rugby teams with three Highlanders players, eight Crusaders, seven Hurricanes, five Chiefs and eight Blues, while ten provinces are represented, led by Auckland and Canterbury (seven players each) with Wellington (six); Waikato, Bay of Plenty, Hawke's Bay and Manawatu (two each); and Taranaki, North Harbour and Otago (one each).
Following the two-day camp this week, the All Blacks will re-assemble in Auckland on Thursday 7 August to prepare for the opening test of the competition, the Bledisloe Cup clash against Australia in Sydney on Saturday 16 August.
All Blacks Rugby Championship squad
Forwards:
Hookers
Dane Coles Wellington / Hurricanes (18)
Keven Mealamu Auckland / Blues (113)
Props
Wyatt Crockett Canterbury / Crusaders (27)
Charlie Faumuina Auckland / Blues (20)
Ben Franks Hawke's Bay / Hurricanes (31)
Owen Franks Canterbury / Crusaders (57)
Tony Woodcock North Harbour / Blues (110)
Locks
Dominic Bird Canterbury / Crusaders (1)
Brodie Retallick Bay of Plenty / Chiefs (27)
Patrick Tuipulotu Auckland / Blues (2)
Samuel Whitelock Canterbury / Crusaders (54)
Loose forwards
Sam Cane Bay of Plenty / Chiefs (14)
Jerome Kaino Auckland / Blues (51)
Steven Luatua Auckland / Blues (11)
Richie McCaw (c) Canterbury / Crusaders (127)
Liam Messam Waikato / Chiefs (32)
Kieran Read Canterbury / Crusaders (62)
Backs:
Halfbacks
Tawera Kerr-Barlow Waikato / Chiefs (14)
TJ Perenara Wellington/ Hurricanes (3)
Aaron Smith Manawatu / Highlanders (29)
First five-eighths
Beauden Barrett Taranaki / Hurricanes (19)
Daniel Carter Canterbury / Crusaders (100)
Aaron Cruden Manawatu / Chiefs (32)
Midfielders
Malakai Fekitoa Auckland / Highlanders (2)
Ma'a Nonu Wellington / Blues (91)
Conrad Smith Wellington / Hurricanes (77)
Outside backs
Israel Dagg Hawke's Bay / Crusaders (39)
Cory Jane Wellington / Hurricanes (48)
Charles Piutau Auckland / Blues (10)
Ben Smith Otago / Highlanders (29)
Julian Savea Wellington/ Hurricanes (22)