• 
  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 TIMING

® Optimum time for application     ¦ Application Useful

TOP TIPS

ŸMARSH SPOT - Peas on soils low in Manganese may need 3 sprays at full dose - Use as routine on crops for seed or human consumption

ŸpH and magnesium status should be checked and corrected before drilling peas

ŸFoliar Magnesium applications really help to produce pea samples with good colour which will attract premiums

Manganese ("Marsh Spot" in Peas)

Symptoms: Plants appear pale with interveinal and marginal leaf yellowing, the veins remaining dark green.

Damage: A brown spot in the centre of the pea seed ("marsh spot"). This causes rejection for human consumption.

Risk Factors: Any field with a history of manganese deficiency - commonly associated with organic and alkaline soils (pH 7 and above). Can be induced by soil compaction.

Treatment: It is now possible to apply manganese as a seed treatment to peas, which can help overcome the problem in the earliest stages of crop development. However, it is still important to apply regular foliar treatments during the growing season. Spray at the first signs of manganese deficiency, repeat when the crop is in full flower, and again 10-14 days later. (Product of choice Amix Manganese)

Vining pea growers should check processor protocols to ensure applications are permitted on contract-grown crops.

Sulphur

PGRO report that Sulphur deficiency in peas is becoming more common, especially on poorer limestone soils. Thiosulphate formulations such as Sulphasol appear more active than elemental sulphur or common sulphates for foliar uptake and response.

Visible symptoms are small, pale plants lacking in vigour. Positive identification of the problem can be obtained from leaf tissue analysis once symptoms are seen.

The pea crop is thought to require around 15-20 kgs S/ha, similar to cereals.

Molybdenum

Required by peas for Nitrogen fixation, deficiency reduces nodulation leading to poor growth. Low rate Molybdenum applications (e.g. In BroadAcre Rape & Pulse Mix) can encourage growth even in the absence of deficiency symptoms.