And how did Congress ever forget the farm workers?

The farm and non-farm labor wage would depart company on February 1, 1970 when non-farm labor moved from $1.30 per hour to $1.45 per hour. 

Non-farm labor under the third tier of laws would continue until February 1, 1970 when it reached $1.60 and farm labor remained at $1.30 per hour. 

The US economy was still sluggish in the early 1970s. Oddly, that was the time of Nixon. The Vietnam War. The Draft. Nixon didn't resign until August 9, 1974. So, the USA was engaged in this raging war in southeast Asia and the economy was still sluggish. Go figure, huh?

May 1, 1974 Congress threw down the gauntlet and raised all three tiers of people including farm income. Tier 1 and 2 went from $1.60 to $2.00. Tier 3 non-farm income went to $1.90 and farm income went to $1.60 per hour.

Less than a year later Congress would do that again. January 1, 1975 everyone received an 10 cents per hour, except, farm labor would receive 20 cents per hour more.  

The Presidential Medal of Freedom, Jefferson Awards for Public Service and Pacem in Terris Award recipient would already be effecting the lives of Farm Workers. Cesar Chavez found his footing in the mid-1960s and would be in full swing into Texas by 1975,