Key Considerations for Canola Crops

NUTRIENT MANAGEMENT

Nitrogen, phosphorus and sulfur are among the most important nutrients for maximum yield and protein content. Efficient use of N fertilizer increases canola leaf area index, plant weight, growth rates, flowering and seed set, pod weight and yield. Nitrogen and phosphorus are necessary to produce a large leaf area that will produce maximum flowers, pods and seed yield.

SOIL AND TEMPERATURE REQUIREMENTS

Canola grows best in thick, black clay/loam soil with good water retention. Canola is moderately tolerant to salinity and higher organic matter will typically improve yields.

Dry soil conditions result in reduced N uptake, while cold, wet soils can limit P uptake.

Key Nutrients

• Nitrogen – For yield, quality and to achieve maximum return, nitrogen is key. However, more nitrogen applied doesn’t necessarily mean more uptake. Often, over-applications can increase N lost to the soil and can also affect plant health, so finding ways to increase nitrogen efficiency can yield a greater ROI.
• Phosphorus – Key for rapid, early growth as well as maturity. Canola extraction of P from the soil is very good, however P uptake can be limited in cold, wet soils.
• Sulphur – Recommended application ranges from 10 lb/ac. to 20 lb/ac. to achieve maximum yield potential, regardless of soil test results.
• Micronutrients – Boron is essential for pollination and seed production in canola. In highly acidic or highly alkaline soils, an application of calcium may also be required.