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Volume 40, Number 8 | MARCH 18, 2014

$4.25

PRACTICAL PRODUCTION TIPS FOR THE PRAIRIE FARMER

www.grainews.ca

Improving canola stand establishment Managing stand establishment through seeding practices could take canola growers one step closer to planting one to get one BY KARI BELANGER

O

n average, Prairie canola growers achieve about 50 per cent seedling emergence, even with the use of high-quality, high-germinating seed. Will western Canadian producers ever reach a point where they can plant one seed to get one plant? Autumn Barnes thinks so. The Canola Council of Canada agronomy specialist says many factors contribute to stand establishment, and while some are beyond producers’ control, there are other areas they can influence to improve stand development. “We can’t do much about our environmental conditions,” says Barnes. “The easiest way to manage stand establishment is through seeding practices.” For example, seeding depth and speed, soil temperature, pre-seed burn-down, herbicide choice, seed treatment and fertilizer placement all play a role in stand establishment and are factors within a grower’s control. Research compiled from hundreds of trials across Western Canada indicates canola typically needs a minimum of five plants per square foot to have a chance of hitting its full yield potential, says Barnes. At three plants per square foot, canola yield potential decreases

and its yield variability increases dramatically. Fields with three plants per square foot may reach from 65 to 90 per cent of their yield potential, depending on the year and the stresses on the crop. Emergence at 10 plants per square foot is ideal because it consistently yields within 10 per cent of its full potential, says Barnes. “At 10 plants per square foot you have some insulation from frost, insect or other damage that may threaten your plant density and yield,” she says. Recent field studies show that approximately 50 per cent of the plant stands examined on the Prairies contained five plants or less per square foot. Those fields are missing out on some yield, says Barnes. The percentage of seedling emergence, which is determined by comparing the number of plants that should be present in an area based on seeding rate and the number actually present in the field, can be used to determine an accurate and optimum seeding rate to achieve 10 plants per square foot. “It’s a good idea for farmers to go out every year and count their seedling emergence to figure out what percentage they’re getting. Recent surveys indicate average canola emergence on the Prairies is around 60 per cent. Some producers get higher and some get lower,” says

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PHOTO: CANOLA COUNCIL OF CANADA

Seeding practices play a large role in stand establishment and are one of the few elements within a grower’s control to improve seedling emergence and survival. Barnes. “If you’re not out counting and recording emergence, you’ll never know how much improvement you have room for.”

WHAT AFFECTS EMERGENCE Because seed size can vary in seed lots from year to year, producers should base seeding rates on thousand seed weight, notes Barnes. “If you have six grams

per thousand seed weight versus four grams and you’re seeding a set five pounds per acre, the number of seeds you plant per square metre will be very different,” she says. Soil temperature at seeding can also affect stand establishment. Seed when soil is between 8 and 10 C for improved plant establishment, says Barnes. “At 8 C you get a quick, even emergence and closer to 100

In This Issue

per cent germination. At 2 C you get slower, uneven emergence.” Although close to 100 per cent emergence may still be achieved when seeding into cool soils, germination may be delayed — at risk to seedling survival. According to recent data, says Barnes, most growers seed at soil temperatures between 4 and 6 C.

» CONTINUED ON PAGE 4

Wheat & Chaff ..................

2

Features ............................

5

Crop Advisor’s Casebook

12

Columns ........................... 21 Machinery & Shop ............ 28 Cattleman’s Corner .......... 33

Australia tackles herbicide resistance LEE HART PAGE 9

The combine that never was, Part 3

FarmLife ............................ 38

SCOTT GARVEY PAGE 28

We would like to provide complimentary cardale seed to CFGB growing projects

204-825-2000 www.seeddepot.ca

New “Straight Cut”

CARDALE

“More Wheat...Less Shatter” Less Fusarium


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