Understanding phosphorus, part 3: Developing fertilizer recommendations

Understanding phosphorus, part 3: Developing fertilizer recommendations

Agronomy Management: It’s important to have adequate P close to the seed during the first six weeks of growth

Part 3 of 3. Prairie farmers spend over $1 billion annually on phosphate fertilizer; these three articles will hopefully assist with a better understanding of how soil P functions in soil, soil testing for P and then how to develop wise phosphate fertilizer recommendations.



Fertilizer in storage at a phosphate plant in North Carolina.

Understanding soil phosphorus, part 1

Agronomy Management: Rotations and fertilizer management have dramatic effects on pools of organic and inorganic P

Farmers and agronomists are very aware that phosphorus (P) is an essential element needed for optimum crop production in Western Canada. Most soils used for annual crops in Western Canada are very low, low or medium in plant-available soil P and are responsive to added P fertilizer. As a result, phosphate fertilizer use is second […] Read more


Earthworm channels in soil tend to be enriched in organic matter, microbes and nutrients, which are of significant help in nutrient cycling.

One does not simply measure soil health

Agronomy Management: Just analyzing soil samples won’t give you the big picture

Over the past 40 years, Prairie farmers have made extraordinary strides in improving soil quality. Two major reasons were the shift from using summerfallow to continuous cropping, and the shift from conventional cultivation to no-till or minimum-till farming. Farmer adoption of these improved practices was gradual. Most famers were cautious and wanted to be sure […] Read more



A calf chows down on sorghum on John Griffin’s south-central Saskatchewan ranch.

Sorghum sudangrass may help soil beat back diseases

The crop’s benefits for farmers are piling up, but be aware of some drawbacks, experts say

Researchers have found potential in sorghum sudangrass — a hybrid of sorghum varieties — as a fungal disease-fighting, soil-enriching grass for cover crops. Although the research was conducted in Prince Edward Island, some say there may be applications for Western Canada as well — including potential as highly-nutritious cattle feed. Two Agriculture and Agri-Food Canada […] Read more



Les Henry.

Editor’s Rant: Thanks, Les

We begin with sad news for readers who haven’t already heard: Les Henry, a soil scientist and university professor dedicated to the improvement of Prairie farmland, and a mainstay in these pages for almost 50 years, left us on June 14 at age 83, ending a long fight with congestive heart failure. We can defer […] Read more

Les Henry. (University of Saskatchewan video screengrab)

Prairie soil scientist and author Les Henry, 83

Henry's outreach to farmers spanned more than half a century

Glacier FarmMedia — Saskatchewan soil scientist Les Henry, well known for his work on improving Prairie farmland and his outreach to Prairie farmers in the pages of Grainews, has died. Ending a long fight with congestive heart failure, Henry died Friday in Saskatoon at age 83, having continued to write until very shortly before his […] Read more