Beginning and development
of the agronomic sciences

Agronomic sciences are the application of biological, physical, and human sciences to agriculture; their development is linked with rigorous experimentation. In the 19th century, scientific progress in chemistry, biology, microbiology, mechanics, influenced the development of agricultural practices.

Little by little, a scientific way of thinking is born and developed, particularly in 3 fields of agronomy:

Genetics (improvement of cultivated plant species by selection (def.) and crossing (def.))

Nutrition (def.) (production and increasing use of fertilizers)

Hygiene (def.) (protection of crops from diseases and insects) 

Simultaneously, agricultural activities are systematically mechanized.