He lectured within the prison camps, and ran courses on biochemistry and agricultural chemistry.
Soon afterward, he became an instructor, then professor, of agricultural chemistry at nearby Rutgers College.
Trained in agricultural chemistry, he began to lecture on agricultural science.
Voelcker was known for his methodical and precise analytical practices as applied to agricultural chemistry.
His 500 lectures and over 500 publications helped to establish agricultural chemistry in Germany.
His research was in the field of agricultural chemistry, in particular mineral fertilizers.
Dawes did not stand for Parliament again, but devoted himself to the study of agricultural chemistry.
From 1869 to 1872, he was professor of agricultural chemistry in the American Institute, and then he started a legal practice as a patent lawyer.
His thesis in agricultural chemistry was based on on the physical composition of tobacco leaves.
He is considered the "father" of Japanese agricultural chemistry.