I know you want the text to say that Christ propitiated God towards everyone, but I'm afraid it doesn't. Nor does it say that the earth sinned. The Bible does say that God placed a curse upon the earth because of sin. I am suggesting that Christ removed that curse.
It is interesting to me what God said about the curse before the flood, because of sin. He said this:
Gen 3:17 And unto Adam he said, Because thou hast hearkened unto the voice of thy wife, and hast eaten of the tree, of which I commanded thee, saying, Thou shalt not eat of it: cursed is the ground for thy sake; in sorrow shalt thou eat of it all the days of thy life;
18 Thorns also and thistles shall it bring forth to thee; and thou shalt eat the herb of the field;
19 In the sweat of thy face shalt thou eat bread, till thou return unto the ground; for out of it wast thou taken: for dust thou art, and unto dust shalt thou return.
I am not sure how much pain and hardship this curse on the ground caused, but it must have been severe. Here is some commentary on it 600 years before the flood.
Gen 5:28 And Lamech lived an hundred eighty and two years, and begat a son:
29 And he called his name Noah, saying, This same shall comfort us concerning our work and toil of our hands, because of the ground which the Lord hath cursed.
30 And Lamech lived after he begat Noah five hundred ninety and five years, and begat sons and daughters:
I am not sure how Noah would relieve the pressures of the curse, but I did read this when he landing on this side of the waters.
15 And God spake unto Noah, saying,
16 Go forth of the ark, thou, and thy wife, and thy sons, and thy sons' wives with thee.
17 Bring forth with thee every living thing that is with thee, of all flesh, both of fowl, and of cattle, and of every creeping thing that creepeth upon the earth; that they may breed abundantly in the earth, and be fruitful, and multiply upon the earth.
18 And Noah went forth, and his sons, and his wife, and his sons' wives with him:
19 Every beast, every creeping thing, and every fowl, and whatsoever creepeth upon the earth, after their kinds, went forth out of the ark.
20 And Noah builded an altar unto the LORD; and took of every clean beast, and of every clean fowl, and offered burnt offerings on the altar.
21 And the LORD smelled a sweet savour; and
the LORD said in his heart, I will not again curse the ground any more for man's sake; for the imagination of man's heart is evil from his youth; neither will I again smite any more every thing living, as I have done.
22 While the earth remaineth, seedtime and harvest, and cold and heat, and summer and winter, and day and night shall not cease.
I cannot find anything in prophesy that God is planning to remove a curse on the ground in the future. Of course, if there were no curse on the ground there would be none to remove.
I admit that I may not have the full picture and am in a learning mode if someone has more light on the subject of the curse and the ground.