T test comparison of 3 treatments

Good evening,

i´ve developed 3 models wich predict the extent of area covered by the studied group.
what statistical test could be useful for comparing the 3 outputs of a polygon area. These have no replicas, i changed the treatment of variables for each of the 3 analysis. The treatments correspond to bioclimatic variables projected in a time scale.

Time Area (hectares)
2000 18,493,300
2050 34,883,800
2070 32,162,900

is a simple T test apropriate? Standar deviation is 7,171,779.194 Ha. The simple T test shows a p value of 0.03021

Thanks a lot for your help.