Complex sentence: The irrigation potential of Brazil is estimated at 29.3 million ha, including only areas where irrigation can be developed and excludes the areas of high ecological value in the northern region (Amazonas and Tocantins basin).
Split into simpler sentences: The irrigation potential of Brazil is estimated at 29.3 million ha. This includes only areas where irrigation can be developed and excludes the areas of high ecological value in the northern region (Amazonas and Tocantins basin).