soybean - Canadian Agronomist

03 Mar Controlling glyphosate/dicamba resistant kochia in soybean

Posted at 22:18h in Weeds

Effective pre-emergent or pre-emergent followed by post-emergent (two-pass) programs tested in this research on the U.S Great Plains should be proactively utilized by growers to manage glyphosate/dicamba resistant kochia in Roundup Ready 2 Xtend (glyphosate/dicamba-resistant) soybean. A similar approach may prove useful for western Canadian...

17 Feb Environment has bigger impact than soybean seeding date

Posted at 22:53h in Agronomy

Up to 90% of total variation in soybean yield and quality was explained by environment, seeding date, cultivar and their interactions, with environment often responsible for the majority of the response. Overall, very late seeding reduced yield, seed weight, and oil but did not affect...

10 Feb Fungicide seed treatments reduce root rot of soybean

Posted at 17:20h in Disease

All of the fungicides and fungicide mixtures tested in field experiments reduced root rot in Fusarium infected soybean seedlings. Varieties were identified that could be used in plant breeding programs to develop Fusarium-resistant varieties. The potential for growing soybean in southern Alberta has increased with the...

01 Dec Soybeans unresponsive to starter N

Posted at 22:51h in Soils and Fertility

Starter nitrogen (N) up to 75 lbs. N/ac broadcast and incorporated before planting a Maturity Group 00 soybean cultivar found no differences in biomass, grain protein, or oil content. There was no yield response for treatments receiving starter N fertilizer relative to the unfertilized control...

16 Jun Critical weed-free period for soybean

Posted at 23:03h in Weeds

Soybean grown in narrow rows shortened the critical weed-free period (CWFP) by up to three soybean developmental stages at site-years with increased weed pressure. Low-density soybean stands lengthened the CWFP by one soybean developmental stage compared with higher-density soybean stands. Generally, the cultivar with the...

28 May Fusarium root rot management in soybean

Posted at 17:27h in Disease

Eight of nine fungicides tested helped to manage Fusarium root rot in soybeans in Alberta. Several soybean varieties were identified with partial resistance to Fusarium root rot. Root rot caused by Fusarium spp. is prevalent in soybean crops in Alberta. The objectives of this study were...

19 Feb Management of volunteer glyphosate-resistant canola in glyphosate-resistant soybeans

Posted at 23:13h in Weeds

Target a soybean seeding rate of 4 to 6 plants per square foot for optimum net return and improved crop competition against volunteer glyphosate-resistant canola. Pre- and post-emergent herbicides were also assessed for control of volunteer glyphosate-resistant canola in soybean. Limited information exists for the cultural...

12 Dec Seedrow starter fertilizer for pulses

Posted at 23:05h in Soils and Fertility

Sensitivity of pulse crops to seedrow placed nitrogen, phosphorus and sulfur fertilizer products was lentil > pea ~ chickpea > soybean ~ black bean > faba bean. Overall and under good moisture conditions, a maximum of 10 kg N/ha rate as starter in the seedrow...

21 May Phosphorus management for Saskatchewan soybeans

Posted at 21:04h in Soils and Fertility

Seed-placed rates of up to 35 lbs. P2O5 per acre (40 kg P2O5/ha) were safe across a wide range of conditions. However, seedrow safety was hard to predict, so sideband is still the preferred method for high P application rates. When soil test P levels...

15 May Nitrogen management options for Saskatchewan soybeans

Posted at 21:22h in Soils and Fertility

On land without a history of soybeans, dual inoculant provided a 24% yield benefit with an overall yield increase of 7 bu./acre (500 kg/ha). Starter N provided little yield benefit when good N-fixation was achieved. In-season N application could be used to rescue a poorly...