New fertiliser rules for winter barley

There is an extra 20kg nitrogen (N) per ha allowed on winter barley as a result of the recent nitrates directive review.

According to the latest advice from Teagasc, out today, it advises farmers to apply the first split (33 per cent of total, or 40 per cent of total if take-all risk is high) of nitrogen (N) now and apply the main split by gs 30/31.

It added: “Apply phosphorous (P) and potassium (K) with the first split based on soil samples – remember high yields last year removed high levels of P and K. Sulphur (15kg/ha) should be applied to all cereals before gs 31, and correct trace element deficiencies based on soil analysis and field history.”

In terms of PGR, it says to consider applying CCC 1.5L/ha before gs 30 to encourage tiller survival (not to reduce lodging).

“This will usually give a yield response (0.2t/ha), helps even up crops, and can be applied with the first fungicide. Add in 0.1L/ha Moddus for high lodging risk fields. For best straw shortening effect in barley, apply Cerone/Terpal/Moddus from gs 32-39 (ideally with the second fungicide).”

In terms of fungicides, Teagasc recommends a three-spray programme for high-yielding crops with an expected yield benefit of 2t/ha and quality benefits.

“Early season disease can rob yield by reducing tiller numbers, it said. “Apply the T1 around gs 30. Options include Proline + partner (SDHI/morph/strob/CTL), Bontima, Ceriax, etc. Apply the T2 fungicide at gs 32- 39 (PGR timing) and the last spray around heading out.”

Pictured: Spraying winter barley. Photo O’Gorman Photography.