Homesteading fact check

Graphs showing homesteading effectively ended after 1940

http://www.nps.gov/home/learn/historyculture/upload/Final%20Patents.pdf
http://www.nps.gov/home/learn/historyculture/upload/Final%20homestead%20Entries%201868-1960.pdf

Why did homesteading end at that time? 
See the timeline here: 

http://www.blm.gov/wo/st/en/res/Education_in_BLM/homestead_act/homesteading_timeline.html

It describes laws relevant to homesteading, including laws before the homestead act of 1862, and after homesteading was repealed in 1976. 

Before 1862, land was available for sale, at $1.25 per acre.

Is it notable that the original homestead act of 1860 was vetoed, on the basis very low cost or free land would fuel speculation rather than benefitting the people.

The Taylor Grazing Act of 1934 "effectively ended new homesteading in most of the contiguous United States." Millions of acres of Public Lands were placed into new grazing districts.

Bundy facts:

The land in Clark County, Nevada, became federally protected in 1989 after the government declared the Mojave Desert tortoise an endangered species. That effectively put an end to livestock grazing there.

Cliven Bundy is a cattle rancher in southeastern Nevada. His family has owned his land and raised cattle on it since they settled there in the 1800s.