. Agri-news. Agriculture. /AM. bl J. April 21, 2003 Seed crops early for highest yield "Generally, early seeding is desirable for crops in all regions of ; says Murray Hartman. oilseed specialist. Alberta Agriculture. Food and Rural Development. Lacombe. "This is especially true in short frost-free areas because of the risk of fall frost damaging yield and quality, and in arid areas where high summer temperatures adversely affect flowering heading and seed development . " However, he says there is also a downside. "Early-seeded stands are often thinner due to f
. Agri-news. Agriculture. /AM. bl J. April 21, 2003 Seed crops early for highest yield "Generally, early seeding is desirable for crops in all regions of ; says Murray Hartman. oilseed specialist. Alberta Agriculture. Food and Rural Development. Lacombe. "This is especially true in short frost-free areas because of the risk of fall frost damaging yield and quality, and in arid areas where high summer temperatures adversely affect flowering heading and seed development . " However, he says there is also a downside. "Early-seeded stands are often thinner due to frost mortality or cold soil conditions. Both of these can result in increased instances of seedling disease. Also, under cold soil conditions, crop seedlings compete poorly with weeds due to their slowed ; Hartman says that the optimum seeding date depends on many factors, such as: • the earliest date that the field can support tractor traffic. This depends on the amount of snow and runoff, soil texture, spring precipitation and temperature, slope, residue, etc • the weather pattern for the growing season. This includes the date of the last lethal spring frost and first fall frost, precipitation amounts and timing, and temperature patterns, especially heat stress during flowering and pod-filling periods • the timing of disease, weed or insect outbreaks • weed control methods • maturity of different crop species/varieties • farm and equipment size "Over the last decade agronomists have changed their seeding date advice from recommending a soil temperature target to recommending seeding as soon as the field can support ; says Hartman. "The Alberta management insights program summarizes agronomic data from crop insurance records," says Hartman. "This data clearly shows that seeding early in Alberta produces the highest ; Alberta Agriculture. Food and Rural Development's web page shows this seeding-date-to-yield da
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