• At Charles R. Wynne Ltd. we offer a complete range of quality fertilizers for both livestock and tillage farms.
  • We can supply fertilizer in 50kgs and 500kgs bags and in bulk.
  • We stock fertilizer from leading suppliers including Greenfields, Gouldings and Target.
  • Our agronomists are available to recommend which fertilizers best suit your individual needs.

Five easy steps to fertilizer management

  • 1. Soil tests – know your soil’s nutrient levels
  • Major nutrients Nitrogen, Phosphorus, Potassium, Sulphur, Calcium
  • Minor nutrients Manganese, Copper, Zinc, Boron, Molybdenum, Iron and Chlorine
  • All are required for crop growth and development
  • 2. Correct soil pH – maximize nutrient availability and uptake, target soil pH should be,
  • Grassland 6.0
  • Cereals 6.5
  • OSR, Beet, Peas and Beans 7.0
  • 3. Crop nutrients can be supplied from three sources
  • firstly by soil reserves
  • added to by manures and slurries if available
  • and the deficit supplied by chemical fertilizer
  • 4. Calculate Chemical fertilizer requirement based on
  • Crop type and yield potential
  • Choose a fertilizer program that best matches your crop’s needs e.g., Urea versus CAN versus Kan (Koch Advanced Nitrogen)

Examples of chemical fertilizer requirements for winter wheat, spring barley and first cut grass silage.

Winter Wheat

Assuming continuous winter wheat N index 1, P and K index 3
Target yield 10t/ha
P=38kg/ha K=100kg/ha

Spring Barley

Assuming continuous spring barley N index 1, P and K index 3
Target yield 7.5t/ha
P=28.5kg/ha K=85kg/ha

First Cut Silage

Assuming P and K index 3
No organic manures applied
P=20kg/ha K=120kg/ha

5. Monitor and Respond
• Monitor crop yields and performance
• Make changes to your nutrition programme accordingly
• During the growing season use crop tissue samples to check the crop's nutrient status