tedyske lujvo

s1=t1 is Earth science based on methodology s3.

terdi2, terdi3 and saske2 subsumed. x1 is an all-embracing term for the sciences related to the planet Earth. It is arguably a special case in planetary science (=plinyske). Not limited to reductionistic science, but also embrace holistic views. See also derske.

In notes:

s1=d1 is soil science [science about earth/soil] based on methodology s3.
s1 is natural science with subject s2 =r1 with methodology s3.