SOIL FERTILITY MANAGEMENT LECTURE 1

Founding father and agronomist

Thomas Jefferson (1743-1826)

Thin soils should be heavily manured

Theophrastus (327 BC -287 BC)

Benefits of green manuring

Virgil (70 BC-19 BC)

Water was the principle nourishment

Francis Bacon(1561-1624)

Water was the sole plant nutrient.

Van Helmont (1577-1644)

Repetion of Van Helmonts experiment and confirmation

Robert Boyle (1627-1691)

Father of feild plot experiments

Boussingault (1802-1882)

Father of agricultural chemistry

Justus Van Liebig (1803-1873)

Establishment of long term feild experiments

Lawes and Gilbert (1854)

Legumes fix atmospheric nitrogen with the help of certaion bacteria present in the soil.

Helleriegal and Wilfarh

This organism was later known identified as bacillus radicicola by:

Beijernink (1888)

Soil properties

V V Dokuchaev (1883)