• 
  Micronutrients
  • Nitrogen (N)
  • Phosphorous (P)
  • Potassium (K)
  • Magnesium (Mg)
  • Calcium (Ca)
  • Sulphur (S)
  • Boron (B)
  • Copper (Cu)
  • Cobalt (Co)
  • Iron (Fe)
  • Manganese (Mn)
  • Zinc (Zn)
  • Chloride (Cl)
• 
  Advice by Sector
  • Cereal Crops
  • Oil Seed Rape
  • Potatoes
  • Sugar Beet
  • Pulses, Peas, Beans & Soya
  • Vegetables, Melons & Salad Crops
  • Top and Soft Fruit
  • Grassland / Pasture
  • Amenity & Sports Turf
  • Home & Garden
• 
  Identifying & Rectifying Deficiencies
  • The Effect Of Soil pH On Nutrient Availability
  • Soil Type, Condition And Likely Deficiencies
  • Crop Susceptibility
  • Typical Deficiency Symptoms by Nutrient

OPTIMUM SPRAY TIMINGS

® Optimum time for application     ¦ Application Useful

TOP TIPS

ŸAlways correct deficiencies and ensure the crop has recovered before applying herbicides

ŸApply manganese after herbicide applications this helps the crop to recover but not the weeds

ŸFrequent manganese applications to sugar beet are needed on deficient soils

Manganese ("Speckled Yellows")

Shows as interveinal yellowing and stunting. Treat as seen or wherever there is a known deficiency. For separate “fire engine” treatments use Manganese Sulphate powder (always with a wetter), but if including as a routine with herbicides and/or insecticides, use an inorganic manganese liquid with wetters and safeners, e.g. Amix Manganese. Granular Manganese fertiliser treatments are not recommended, as soil deficiencies are very rare, it is the pH and other soil conditions that prevent the manganese in the soil being available to the plant. Adding further to soil reserves will not make it more available to the plant..

Sulphur

Sulphur treatments can give useful control of powdery mildew if infection appears a month or more before harvest. Yield responses can be considerable in years when the disease invades early and spreads rapidly. Use in combination with Alto or Punch C for control of severe disease, and the additional control of Rust. Thiosulphate formulations such as Sulphasol appear more active than elemental sulphur for this purpose.

Boron

Causes "heart rot" or "crown rot" in maturing plants. Advance warnings of likely deficiency should show up in soil samples. Sampling at the young plant stage is very helpful, as when split longitudinally with a sharp blade, deficient plants show a clear dark thread descending from the point where stem becomes root, down the centre of the taproot. Use a boronated foliar spray, e.g. Borimol liquid/BroadAcre Boron Liquid, rather than Boron in the base fertiliser as this is less effective. Borimol contains a trace of the vital element Molybdenum with the Boron which has been shown clearly to improve the metabolisation of the Boron and associated available Nitrogen.

Magnesium

Extremely rare in beet, and if identified by soil sampling should be rectified in base fertiliser application rather than by foliar sprays. The routine treatments advocated by some agronomists appear to be unnecessary.