Does anyone know how much S15 I can safely seed place with yellow peas? 3” spoons, 10” spacing. I was hoping to seed place 100lbs S15 per acre.
Torriem, what size opener and spacing?So basically Abfarms, you put no MESZ in the seed row whatsoever. Double shoot is different than doing seed-placed, and not the same thing as what the original poster is asking about. We regularly put down 300 #/ac of total NPK product in the double shoot with all kinds off crops with no issues, because as you say there's separation there. Putting phos with the seed row is another story.
With peas we typically put 20#/ac actual Phos with the seed, and any more we put in the double shoot. S15 should be safer than 11-52. But I don't know how much safer.
I also regularly put large amounts of fertilizer with the double shoot 1" down blow the seed spread (using flexicoil stealth openers with knock on seed sweeps whatever they are called). But I would never do that with a single-shot drill, even with a 3" spread. That's my point. What you and I can do with our double shot drill is much more than can be done safely with a single shot drill--I've placed nearly 300# of product (various blends) down in the tips and rarely have any issue with seed burn in crops. That 1" separation is the key, and in my opinion, the result is similar to what you can do with a side band knife. That's why I often equate the two techniques. And although it's technically in the same row as the seed, when I hear "placed in the seed row" that means to me it's placed with the seed with the same hole in the opener and the same hose.Torriem, it is placed in the seed row, 1” below. It is NOT sidebanded. Look on the GEN mfg website for T300x2 opener and GEN 74 wear point. Fertilizer comes out the front opening and placed directly below the seed and Inoculate. It is in the seed row and not “side banded” I use the gen 71 tip for sidebanding and a 3” DS point for paired row. essentially my actual SBU is lower than what the poster is using and higher rates with little issue. There is no horizontal separation, only 1/2-1” vertical. Peterdevries I think you will be safe at 100lbs as your 3” spread will offer higher SBU and larger distances between seed & fertilizer. Also MES has a lower salt index and the S part is 1/2 elemental, slowing down the process of S breakdown.
Keep in mind that sulfur you used is AMS, which is a much different product than S15. You used 35 lbs of it which is a lot to seed place with a cereal let alone a pulse. S15 has the same blend of sulfur and phos formed in every granule to reduce seed burn and increase yields because each plant has access to every nutrient.I wouldn’t put any sulfur with peas. I did once with a single shoot disk drill and it thinned the stand out. Was dry till the beginning of June. Some of the peas turn black in the ground. Where there was no sulfur, no black seeds. 75 lbs of fertilizer 40lbs of it was 11-52