From poultry management textbook published in 1952. The book has much, much, more information on nutrition and feeding than just these few pages. Even the whole book is NOT better than poultry feeds currently available in the US.
Partly because more is known about nutrition (notice quote from page 341, "Animal proteins. These products serve as a source of protein, minerals, vitamin B12, and at least one other still-unidentified nutrient."
Partly because chickens have changed. This book says published records of egg-laying tests "reveals the tremendous progress"... 1919 1,000 birds entered into one of the leading contests laid an average of 145.5. Same test is 1947, the average was 228.2. Today, most backyard hens will lay an egg almost every day.
And partly it is because the nutrient value of many plants had decreased due to selecting for other characteristics - like flavor, size, and production.
This is almost certainly better than the vast majority of rations you will find online. If I did not have access to chicken feed, I would choose a breed that was not a top producer and then select for the ability to forage and the ability to adjust production in response to diet. And do a lot of research.