The average estimated cash rent was $202 per acre on top quality land, $161 per acre on average quality land, and $124 per acre on poor quality land. This was an increase in rental rates of 2.0% for top quality land, 1.9% for average quality land, and 2.5% for poor quality land.
R-Group. In solution it is the nature of the amino acid R-groups that dictate structure-function relationships of peptides and proteins.
1 The R functional group is known as the amino acid side chain. 2  There are 20 common different amino acid side chains. 3  This is what distinguishes one amino acid from another. 4  Amino acids are also known as residues. The R functional group is known as the amino acid side chain. 2  There are 20 common different amino acid side chains. 3  This is what distinguishes one amino acid from another. 4  Amino acids are also known as residues.