Field Crop Response to Potassium on Soils with High Extractable Potassium and Varying Soil Supply Rates of Potassium

Crop responses to K on many western Canadian soils, even on soils testing high in K, have many people questioning the soil testing procedures used and/or the method by which K varies within fields. Using the Plant Root Simulator (PRS) probe, an ion exchange membrane system for measuring soil nutrient supply rate, a project was initiated in the semi-arid region of Saskatchewan to evaluate crop responses to fertilizer K on soils which are regarded as non-responsive using traditional K extraction methods.

IPNI-1999-CAN-SK23

To investigate the potential for a K response in a Southern Saskatchewan field and to compare the abilities of conventional K extraction and K supply rate to predict yield responses to added K. Read more


Year of initiation:1999
Year of completion:1999
Map:

Interpretive Summary

1999

Field Crop Response to Potassium on Soils with High Extractable Potassium and Varying Soil Supply Rates of Potassium, 1999 Crop responses to K on many western Canadian soils, even on soils testing high in K, have many people questioning the soil testing procedures used and/or the method by which K varies within fields.


Updates & Reports

1999

1999 Annual Report

2001

Objectives

2001

Investigators

2001

Justification

2001

Project Description

2001

Methodology


Project Leader

Ken Greer, Western Ag Innovations


Project Cooperators

Catharine MacLeod


IPNI Staff

Adrian Johnston


Location

Americas \ Northern America \ CAN \ Saskatchewan


Topics

4r rate, 4r source, nutrient management

rapeseed (canola), wheat

Potassium (K)