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Over the Hedge - Arable Barometer farmers' diary

N dressing on Dorset OSR finished just in time

It's all go at North Farm, Horton in Dorset, writes Peter Snell.

The Castille winter oilseed rape has had all its nitrogen now - just in time as the variety is coming in to flower and the crop height would impede the spread pattern if we had gone later. The total N applied this spring was 220kg/ha.

The second wheats, which had an early dose of 40kg/ha of N, have now received a further 100kg/ha.

T0 spraying on the wheat has been stop-start. The 1litre/ha of Cherokee (chlorothalonil + cyproconazole + propiconazole) is accompanied by 2litre/ha of chlormequat and 0.75litre/ha of manganese. The chlormequat would benefit from some more consistent warm weather, and if the wind abated we could continue spraying.

Planning future fertiliser requirements is giving me some cause for concern.

When should I enter the market for next season? What will be the availability for the season after that and should we order more now to provide cover?

Also with P + K prices continuing to rise we will definitely be chopping all our wheat straw again this year (apologies to straw buyers).

There is speculation that triple super phosphate (TSP) could reach £700/t. So presumably if other growers chop their straw will this push the value of straw up, or will the increase in cereal area counter this?

Also taking up our time is the new grain store. Steels are up, the concrete floor is shortly to be laid, and the panels and Challow floor have all been delivered this week.

I'm also busy designing a new website for the farm business and we've just ordered a new Amazone trailed sprayer and Amazone hydraulically driven mounted fertiliser spreader for delivery after harvest.

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More diary entries in our Barometers' Over the Hedge series

Comments

 

TeslaCoils said:

"But we have had 4.4t/ha from winter rape and up to 9-10t/ha of wheat."

220kg of N seems a bit much - I dont know your SMN or what GAI you had after winter, but knowing that "Large amounts of sewage sludge, green waste compost and farmyard manure are applied to help maintain soil organic matter levels and the fertility left by the cows", I put some figures into the Kemira calculator, and a GAI tool that my agronomist provided and that does look like a hell of a chunk of N if you have only historically had 4.4t/ha of seed offtake.

I dont want to be rude, but could you tell me how you got to 220kg/ha N?

April 5, 2008 9:34 AM
 

peter snell said:

220 kg/ha of nitrogen in the form of ammonium nitrate and ammonium sulphate has been applied to our OSR this spring, with the aim of achieving a yield of upto 5 t/ha. Our smn's were average (i.e. 40 kg/ha N) and gai's were (in early March) more like the typical 2's one would hope for at that time of year. No sewage sludge, compost or fym was applied prior to sowing (so as not to delay drilling). The total applied figure of 220 kg of N per ha (in two main splits) were taken from the TAG recommendations and with this advice and also being FACTS qualified I was happy with this figure. Hope this explains, regards Peter

April 7, 2008 1:35 PM
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