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Discussion in 'Cropping' started by jpd, Jan 4, 2019.
As far as i know, applying p when the crop uptake is low just means the soil will just lock it up
Yes and no. Fertilisers like TSP dissolve slowly but high calcium soils will lock some of it up.
Wouldn't give a stuff. Get on with the job, it's not going anywhere. You will lose nutrients if soil is leaving the field, no disputing that. The time of K application makes no difference.
Not so sure ,we have found a positive and cost effective return to K applied as a foliar at around flowering but agree that maintenence levels can more or less be applied any time but personally favour at sowing to help rooting and development
Hmm. MOP is potassium chloride, which is quite toxic in concentrated doses.
My WB is half yellow, and half yellower. Can't do much about it though, way too wet to travel with sprayer, or fert spreader, even if I wanted to.
That’s par for the course in January . I wouldn’t worry about it.
Wind and rain has made the decision for me.
Foliar K: I agree I see value in that but I was referring to K reserves in the soil, more fertile soils hold crops better over winter and keep them more robust IMO.
There’s only one man talking sense there and it’s @andyhoward
Your shout really. If you think the K will leach then hold off. However, if the soil has any clay or OM that will hold on the K and want to get a job out of the way then crack on. BTW I favour the 2nd approach if you didn't notice.
Will be on as soon as it is legal and the land will travel
MOP on OSR today conditions to good to miss putting half on now rest in march.
On with polysulphate on everything this last few days. Not leaving a mark on ground that will sink a tractor in a wet year. Fear it will be a different story come mid Feb when I want to get the urea on...
If things do not alter substantially, and there is no big rain forecast, I shall be looking to get urea on soon as legal.
There is no ground water here, normally waterlogged land is bone dry, pond water levels which rose before Christmas are falling again. If it stays this dry, we shall be looking at fert granules dry on the surface, and starving crops in April. The leaching of urea is much over rated IMO.
Urea is converted to ammonium then to nitrate. Nitrate leaches. Just being pedantic.
He possibly meant volatilisation?
Not at this time of year.
No, but then he can't apply it at this time of year.