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


This photo shows Earl Christiansen at the Shaunavon site in 2006. Earl and I had gone to check out the site after 24 years. Farmer Bruce Poppy left the patch of grass as we suggested and left our nest of piezometers. The “deep” 53-foot piezometer has since started to flow but not enough to cause flooding, so it is OK. In this case “deep” was 53 feet.

Les Henry: How deep is deep?

Let us stretch your brain

Thanks to readers for your book orders and kind notes of encouragement about my column. A recurring comment from readers is they appreciate the “thought provoking” ideas. Over many years of writing, there have been many articles that just provide facts and figures and specific recommendations for crop and soil conditions. However, some are designed […] Read more

Phosphate being applied with anhydrous ammonia in a dual placement banding on a Manitoba farm last fall. Manitoba Agriculture soil fertility extension specialist John Heard maintains this is an effective application method because it places phosphorus within the soil away from potential runoff losses and the acidifying nature of anhydrous ammonia tends to increase the availability of the phosphorus to next year’s crop.

Your fall fertility primer

Get a head start on next year’s crops with these fertility guidelines, options and pro tips

Many Prairie farmers choose to apply fertilizers to their fields in the fall to save time in the spring — a strategy Farmers Edge agronomist Thom Weir believes makes good sense for a couple of reasons. “There’s lots of data that shows seeding early has a significant benefit to yield,” he says, adding that for […] Read more


Silage corn grown during drought can lead to feed quality and safety issues.

Drought-stricken corn can make dangerous silage

High nitrate levels, moulds and toxins might prevail


Much of this year’s corn crop across the southern Prairies has been once again hit by drought. My photograph of a southern Manitoba cornfield in mid-August shows one of the worst cornfields I have ever seen. It tasselled out early with curled grey leaves and no visible cobs on its stalk. Most whole plants were […] Read more

The future of broadcasting nitrogen in the fall

The future of broadcasting nitrogen in the fall

The inefficient practice is on the rise; however limits may be on the way in Manitoba

Broadcasting in fall is the quickest and easiest way to apply nitrogen — and the least efficient. So why, anecdotally at least, does the practice seem to be on the increase? Bigger farms and a shortage of labour could be part of it. Moreover, nobody knows when poor weather will shut down field operations. And […] Read more


Nitrate in the environment

Nitrate in the environment

Agriculture is a big part of nitrogen movement. Let's measure what we're doing

This column has dealt with “nitrate down the well” a few times in the past. To make a long story short: Nitrate-contaminated farm wells have been known since 1945 when the first case of infant “blue-baby” was related to a contaminated farm well in Iowa. A 1948 survey of 2,000 Saskatchewan farm wells found 18 […] Read more

Applying your nitrogen in the fall

Applying your nitrogen in the fall

Agronomy Management: Fall application can be more convenient, but effectiveness varies, depending on conditions

Applying nitrogen fertilizer at the time of planting in spring is usually the best option for most Prairie farmers. But that means applying a lot of product, which can really slow down the seeding process. Getting the seed in the ground at the optimum time is important, and delays can reduce crop yield potential. Some […] Read more