Canola Fertility

[farmaholic]

Thanks

[bgmb]

Klause, I would post pics of 60 + last 2 years on 120-45-10-15 but **** it everyone knows big N rates don't help canola yields. NH3 too for decades.

[Klause]

And how much of that N is being lost? U of S did research and found the N efficiency rate for high N protocols is about 55%.



Also... Manitoba soils generally need higher rates of fertilizer... Rec's for oats are generally 100lbs/ac in Mb and 55-65 in SK/AB.

[bgmb]

Next to none would be lost all spring applied at seeding 2-2.5 inches deep sideband with shank not mrb disc. Yeah I agree all soild are different. And I would not expect all areas will be able to grow 60 canola. I will say we hit 50 in the early 2000s with canolas that by the numbers had 30% lower yield potential than current varieties and we were using roughly 2/3 the fert we are now.

[Klause]

Next to none would be lost all spring applied at seeding 2-2.5 inches deep sideband with shank not mrb disc. Yeah I agree all soild are different. And I would not expect all areas will be able to grow 60 canola. I will say we hit 50 in the early 2000s with canolas that by the numbers had 30% lower yield potential than current varieties and we were using roughly 2/3 the fert we are now.

I'll only say on the first part of your post... You need to understand the N cycle a lot more.

Have a read.

[bgmb]

Klause I understand the nitrogen cycle. I dont consider applied nitrogen fertilizer that enters the nitrogen cycle "lost"

[bgmb]

Fyi Klause we have gone from 5 ish organic matter to 7% ish organic matter over the last 20 years. Min/zero till, lots of nitrogen fert, a good rotation contributed to that increase.

[Klause]

Klause I understand the nitrogen cycle. I dont consider applied nitrogen fertilizer that enters the nitrogen cycle "lost"

No one said it's a waste. I'm also not advocating the end of using nitrogen. I'm saying become more efficient with it. You're putting on about 140 lbs the plant will use about 48% of that. The rest is lost to denitrification, volatization, chealation, etc.

[bgmb]

No one said it's a waste. I'm also not advocating the end of using nitrogen. I'm saying become more efficient with it. You're putting on about 140 lbs the plant will use about 48% of that. The rest is lost to denitrification, volatization, chealation, etc.

We will have to agree to disagree on this one Klause. 60bu *2lb/bu =120 lb maybe I am a little light on the p and k overall goal on our farm is to fertilize for a 50 bu crop removal. Maybe will up them on some fields next year and see if that works along with normal n rates.

[seabass]

Depends on mother nature. Best laid out plans can be blown to hell when she shows up.