article_snippet: GPS provides accurate location information by calculating the distance from at least three satellites and can also be used on farms to analyse soil fertility, Alex Thomasson, professor of biological and agricultural engineering at Texas A&M University wrote in an article for The Conversation.
article_snippet: Farmers can use a GPS receiver to collect soil samples from pre-selected parts of fields.
article_snippet: Farmers then send soil samples off to a lab for analysis, which creates a fertility map of Farmers farm.
article_snippet: Farmers can use a fertility map of their farm to work out the amount of fertiliser needed for each location, giving Farmers crops the best chance of growing and saving their crops money.
article_snippet: Variable-rate technology (VRT) fertiliser applicators dispense just the right amount of fertiliser in each location, varying the qualities as the farmers go along.