The map shows the distribution of dairy farms across the Lower 48 of the United States. Each dot on the map represents approxima

1. Substantial areas of land are utilized for cultivating corn and growing nutritious grasses.

2. Rainfall and Vegetation

Explanation:

1. An essential aspect of land usage in dairy farming is the significant allocation of land for the growth of corn and nutrient-rich alfalfa grass, replacing previous practices focused on temperate wheat cultivation. The advent of successful commercial dairy farming in these regions has encouraged extensive farming approaches, emphasizing large-scale production of corn and alfalfa. While the application of manures and use of machinery is high, yields per unit of land remain lower despite overall high production levels.

2. Two geographic elements not represented on the map that support this concentration include:

• Vegetation - The temperate grasslands (Prairie) in these areas provide ample ground for growing fodder grasses, which are ideal for dairy farming.

• Rainfall - These regions benefit from abundant rainfall supplied by nearby large freshwater lakes, which is essential for cultivating animal feed.