Final answer:
The Mexican government tried to end immigration into Texas by 1830 due to several reasons, including the growing presence of American settlers and their desire for independence. The government implemented various measures such as outlawing slavery and encouraging Mexican immigration, but these efforts were unsuccessful.
Step-by-step explanation:
The Mexican government tried to end immigration into Texas by 1830 due to several reasons. The growing presence of American settlers in Texas, their reluctance to abide by Mexican law, and their desire for independence caused the Mexican government to become wary. To weaken the influence of the Texans, the government outlawed slavery, encouraged Mexican immigration, and increased military presence in Texas. However, these measures failed, and tensions between the Mexican government and the Texans continued to escalate.