Grow the future | Grassland Sulphur Grow the future | Grassland Sulphur

Spreading nitrogen and sulphur at the same time means more grass

Applying fertilisers containing nitrogen and sulphur means the grass uses nitrogen more effectively, you get more kgs of dry matter per kg of nitrogen that you apply

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New grassland research examining the performance of foliar nitrogen

There has been a great deal of interest over the last three years in foliar applied nitrogen (N) on grassland. To learn more about the performance of foliar N on grass, Yara UK began a replicated plot trial in 2023 which will run for three years.

Plot trial photo

The trial is modelled on a 4-cut silage system, with the first cut taking place in early May, with subsequent cuts taken every 5 weeks approximately.

The total season N rate per ha for the 5 treatments (trt) is as follows: trt 1 - 0 kg, trt 2 - 340 kg (100% soil applied), trt 3 - 203 kg (86% soil applied, 14% as a slow-release foliar N product), trt 4 - 203 kg (100% soil applied), trt 5 - 203 kg (28% soil applied, 72% as a foliar urea product + humic acid). The total N application rate for trt’s 3, 4 and 5 is 40% lower than trt 2.

N response bar chart

The foliar N is applied 10 – 12 days after the previous cut to ensure there was enough leaf surface to intercept the foliar products.

2024 results - The total dry matter (DM) yield per ha for each trt was 4,490 kg, 12,371 kg, 10,285 kg, 10,536 kg and 8,985 kg for trt 1, 2, 3, 4 and 5 respectively. The N response for trt 2 and 5 was 23 and 22 kg/DM per kg of applied N, while trt 3 and 4 had a N response of 29 and 30 kg/DM per kg of applied N respectively.

Total DM Yield Bar Graph

More information on this research can be found on our website.

Can you identify grassland nutrient deficiencies?

Identify and diagnose if your grassland is suffering from nutrient deficiencies and learn more about the symptoms and causes and how to control or correct the deficiency

Nitrogen deficiency
Nitrogen deficiency

 

 

 

Nitrogen

Phosphorus deficiency
Phosphorus deficiency

 

 

 

Phosphorus

Potassium deficiency
Potassium deficiency

 

 

 

Potassium

Sulphur deficiency
Sulphur deficiency

 

 

 

Sulphur

Recent grassland webinars

Advice on managing fertiliser inputs on first cut silage crops this spring
Philip Cosgrave, Yara's Grassland Agronomist is joined by Nicola Ingram and Nigel Mills, Yara Area Managers for UK and Ireland, to discuss a range of topics to help inform farmers on how best to manage fertiliser applications this spring on silage crops.
Yara and CAFRE Nutrients Action Programme (NAP) - Update for fertiliser distributors
In this webinar Philip Cosgrave, Yara Grassland Agronomist and Aveen McMullan, Senior Agricultural Technologist at CAFRE provide an update on the Nutrients Action Programme (NAP) regulations relating to the use and application of inorganic fertilisers and an explanation of the requirement for fertilisation plans.
How to get healthy grass and happy cows
In this webinar, Philip Cosgrave is joined by Conrad Ferris from AFBI to talk about the planning behind a successful spring grassland nutrition strategy.
How to manage lime and fertiliser on a livestock farm
In this webinar, Philip Cosgrave of Yara and Kevin Havekes of Kilwaughter Lime collaborate to give an insight into how lime and fertiliser work hand in hand.
Grass, milk and robots - webinar
Our grassland agronomy expert Philip Cosgrave joins Cormac Garvey from Lely for this webinar to discuss grazing systems for robotic milking, grassland management and grassland nutrition management.
How manage grassland fertilisation in simple steps
In this webinar, Jon Telfer, Philip Cosgrave and Nigel Hester talk through the steps needed for successful grassland fertilisation.

Listen to the latest grassland podcasts

If you are short of time why not check out our bite-size podcasts for the latest thoughts on grassland nutrition.

Grass and forage agronomy and fertiliser advice
Grass and forage agronomy and fertiliser advice

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