Volume 4 (1898)
Sugar beet investigations--1897.
The Russian thistle.
Weeds of corn fields.
The relation of acid fermentation to butter flavor and aroma.
Some reports from trial stations on new orchard fruits and shrubs.
Horse nettle as a troublesome weed in Iowa. Two other troublesome weeds. Potato scab.
Some injurious scale insects.
Observations and suggestions on the root-killing of fruit trees.
Field experiments with corn, oats, barley, wheat, brome grass, rape. Sorghum, soy beans, cow peas, and sugar beets.
Facts and opinions about plums and plum growing in Iowa
Notes on vegetables.
Economical production of beef.