Plant protein had other amino acids that did not adequately meet the complete protein profile. It also did not have creatine, which appeared to be more important than previously understood. The plant protein was somewhat balanced, but not enough to make a difference in this rigorous test.
Additional amino acids would be needed to help fix plant protein amino acids and they will need creatine.
Alternatively, eat pork.
The study used military meals with pork. Pork is cheaper than some other meats, so I imagine that is why that meat was chosen by the Army. I would like to know if the results would be similar with other animal proteins, like beef, chicken, fish, eggs, cheese, and milk?