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Volume 41, Number 6  |  MARCH 3, 2015

$4.25

PRACTICAL PRODUCTION TIPS FOR THE PRAIRIE FARMER

www.grainews.ca

Seed survival still stumps By Lee Hart

W

hat’s killing those canola seeds before a seedling can get out of the ground? That could very well be a 64 million or perhaps billion dollar answer for Prairie farmers looking at seed priced at about $10 per pound and anywhere from a 20 to 50 per cent seed mortality rate. But you can’t necessarily blame seed or equipment for the poor performance. Even with good-quality seed and properly adjusted equipment used to seed the crop into almost ideal seed bed conditions, the results of crop emergence are all over the board, says Blaine Metzger, a researcher with Alberta’s AgTech Centre in Lethbridge. The AgTech Centre has looked at the issue in the past couple of seasons, and hopes to continue the work to pinpoint what is affecting canola seed survival, says Metzger. “The fact is there appear to be so many variables,” says Metzger. “We have used one type of opener on replicated plots to seed canola and in one plot the emergence was 80 per cent, and then used the same piece of equipment on another plot and the emergence was 50 per cent.” In fact, in their research they

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have used eight different openers all on the same air seeding system — from minimum to high disturbance openers — and found the same degree of variability. “You can get losses due to seeding depth and seed placement, seed that didn’t germinate because it was mechanically damaged. Fertilizer damage and seeding speed is an important factor, too” says Metzger. “But we found that losses due to any one of these factors in itself wasn’t enough to account for situations where there was 50 per cent seed mortality. It is frustrating, because just when you think you might have something, the next plot proves you wrong. So we’re thinking if it is not the seed and equipment it has to be an environmental effect.” Metzer says he had focused on canola because it has such variable seed survival. But large-seed crops such as cereals and pulse crops can also experience 20 to 30 per cent seed mortality. Tracking seed placement and depth, and counting seedlings is a labour-intensive process. Metzger needs as many as eight technicians and summer students spending a lot of time on their knees to determine where the seeds are and whether they survived.

» continued on page 4

photo: courtesy of alberta agtech centre

Seed killer still at large. Several suspects behind high mortality, but no arrests

It’s a lot of tedious work to looking into seed survival by digging into a seed row after seeding to count seeds, measuring spacing between seeds and confirming seed depth.

In This Issue

Wheat & Chaff .................. 2 Features . ........................... 5 Crop Advisor’s Casebook . 8 Columns ............................ 16 Machinery & Shop............. 24 Cattleman’s Corner .......... 30

Stubble soil moisture map les henry page 16

Build a better workshop

FarmLife ............................ 33

scott garvey page 24

Cardale seeddepot.ca for free seed offer

Consistent Yields & Protein Less Sprouting* - Weathering Best Fusarium Performance Semi Dwarf Faster Harvest Speeds Easier Straw Management *Better Falling Numbers

Working Hard to Earn Your Trust


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