Potassium Recommendations for Corn in North Dakota

IPNI-2014-USA-ND17

1. Problem and Opportunity Statement-Importance of this project for North Dakota corn producers Potassium recommendations for corn in North Dakota were developed nearly forty years ago. Potassium (K) soil test levels were commonly above 400 ppm at this time, good corn yields were edging towards 100 bushels per acre and the primary rotations within the state were small-grain driven, with little K removed from the soil. Read more


Year of initiation:2014
Year of completion:2016
Map:

Interpretive Summary

Existing potassium (K) fertilizer recommendations for corn production in North Dakota are based on field calibration response trials conducted decades previously. The objective of the study was to determine the critical soil test K concentration that would define the level above which little crop response to additional K fertilizer would be realized, and below which K fertilizer is needed.

Existing K fertilizer recommendations for corn production in North Dakota are based on field calibration response trials conducted decades previously. This project is being conducted to determine if the present recommendations are accurate, considering changes in potential corn yields due to higher yielding cropping systems used by farmers.

Comprehensive K fertilizer calibration work in North Dakota has never been conducted, since K soil concentrations in most of the state, until the last 20 years, have indicated very high levels. Since 1992, increased rainfall and well-adapted varieties of soybean and corn have resulted in a shift in production from small grains and sugar beets, to corn and soybean.

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Updates & Reports

2014

Project Description



Project Leader

David Franzen, North Dakota State University


Project Cooperators

None


IPNI Staff

T. Jensen


Location

Americas \ Northern America \ USA \ North Dakota


Topics

nutrient management

maize

Potassium (K)