The project will assess the response of beet crops to a range of sulphur application rates across a range of sites with contrasting soil types and cropping regimes. It will target soil types and regional weather trends (such as light textured soils with high winter rainfall >175mm) where the risk of sulphur deficiency is considered higher. The work will be undertaken crops with later harvest dates (post November) to target potentially higher yielding crops. The work will include an analysis of sulphur levels in plants to identify how any responses may relate to deficiency levels (previous work indicates this as >250ppm) A limited survey of sulphur levels in crops will be used to assist in identifying where responses may be most likely to occur. This information will be used in conjunction with sulphur deposition maps to further improved advice in this area.
Outcomes / Key Message For Growers And Industry
- Four sites were unidentified where there was potential for sulphur deficiencies. This included light sandy loam, thin Lincolnshire brash and sandy clay loam soil types. None of the sites had organic manures applied to them.
- There were no effects of sulphur treatments on yield and sugar content measured in 2018 on either site.
- Drought affected all the sites, resulting in range of canopy yellowing, necrosis and leaf senescence. It was not therefore possible to assess visual symptoms of sulphur deficiency and measure plant tissue sulphur levels.