Continuous Corn Response to Nitrogen
and Potassium in Northern Iowa

Mallarino, Antonio; Hirniak, Jackson; Oltmans, Ryan; Schnabel, Matthew

Continuous Corn Response to Nitrogen and Potassium in Northern Iowa

File

ContinuousCornNO.pdf (156.4 KB)

Date

2017-01-01

Authors

Mallarino, Antonio

Hirniak, Jackson

Oltmans, Ryan

Schnabel, Matthew

Altmetrics

Organizational Units

Organizational Unit

Extension and Experiment Station Publications

It can be very challenging to locate information about individual ISU Extension publications via the library website. Quick Search will list the name of the series, but it will not list individual publications within each series. The Parks Library Reference Collection has a List of Current Series, Serial Publications (Series Publications of Agricultural Experiment Station and Cooperative Extension Service), published as of March 2004. It lists each publication from 1888-2004 (by title and publication number - and in some cases it will show an author name).

Organizational Unit

Agronomy

The Department of Agronomy seeks to teach the study of the farm-field, its crops, and its science and management. It originally consisted of three sub-departments to do this: Soils, Farm-Crops, and Agricultural Engineering (which became its own department in 1907). Today, the department teaches crop sciences and breeding, soil sciences, meteorology, agroecology, and biotechnology.

History
The Department of Agronomy was formed in 1902. From 1917 to 1935 it was known as the Department of Farm Crops and Soils.

Dates of Existence
1902–present

Historical Names

Department of Farm Crops and Soils (1917–1935)

Related Units

College of Agriculture and Life Sciences (parent college)

Journal Issue

2016 Farm Progress Reports

Department

Extension and Experiment Station PublicationsAgronomy

Abstract

A long-term experiment was established in 2013 at the Northern Research and Demonstration Farm to study the responses to nitrogen (N) and potassium (K) on continuous corn. Results of a previous long-term study with continuous corn conducted at this farm from 1963 through 2001with different N, phosphorus (P), and K fertilization rates showed a positive interaction between N and K, but not between N and P, or P and K. A deficiency of either N or K reduced the maximum yield level and also limited the yield response to increasing rates of the other nutrient. The study summarized in this report was established to further assess possible N by K interactions.