1st Cut (No Slurry)

Icey Road

The recommendations in this section are using the RoI fertiliser classification system and are based on Teagasc research.

Due to slight differences between the RoI and NI classification systems, these recommendations are only a guide for Northern Ireland farmers. They can be converted between the RoI and NI classification systems using this Conversion Table.

Before choosing your fertiliser products please consult your local advisor to ensure that you do not exceed the limits for your farm as determined by the nitrates directive (SI no 31 of 2014).

Table 16. Nutrient Requirements (units/acre)
Index N P K
1 100 32 140
2 100 24 120
3 100 16 95
4 100 0 0

*where silage fields were grazed rather than cut in previous years reduce the N amount to 80units/acre

The level given for nitrogen and phosphorus are the maximum application rates allowed according to the nitrates directive.

Fertiliser Recommendation

Table 17. Application rate (bags/acre)
Index K1 K2 K3 K4
P1 3 x (0-7-30)
+
4 x (24-2½-10)
3 x (0-7-30)
+
4 x (Richland)
2½ x (0-7-30)
+
4 x (Richland)
1 x (16% Superphos)
+
4 x (Classic NP)
P2 2 x (0-7-30)
+
4½ x (Repenish)
1 x (0-7-30)
+
5½ x (Replenish)
2 x (0-7-30)
+
4 x (Richland)
½ x (16% Superphos)
+
4 x (Classic NP)
P3 1 x (Muriate of Potash 50%)
+
5½ x (Replenish)
¾ x (Muriate of Potash 50%)
+
5½ x (Replenish)
5½ x (Replenish) 4 x (Classic NP)
P4 5 x (Classic NK)
+
1¼ x (Muriate of Potash 50%)
5 x (Classic NK)
+
1 x(Muriate of Potash 50%)
5 x (Classic NK)
+
¼ x (Muriate of Potash 50%)
3½ x CAN
No P or K required
  • For all situations, apply C.A.N., Sweetgrass or Urea to satisfy the extra Nitrogen requirement as recommended by your advisor.
  • Richland: 22.7 – 2.5 – 5 + 3% Sulphur (S) + Copper (Cu), Manganese (Mn), Magnesium (Mg) and Zinc (Zn).This product is ideal for supplying N, P, K and essential trace elements for growing top quality grass and silage.
  • Sweetgrass: 23% Nitrogen (N) + 2% Sulphur (S) + 1.2% Magnesium (Mg) + 5% Sodium (Na). This product is especially formulated with the grass farmer in mind. The Sulphur and Magnesium will help to increase grass protein while the Sodium will encourage cows to have higher dry matter intakes, making it an excellent quality silage option.
  • Replenish: 18 – 2.5 – 14 + 2% Sulphur (S) + Copper (Cu), Manganese (Mn), Magnesium (Mg) and Zinc (Zn).This product combines low P and high K, Sulphur and essential trace elements ideal for top quality silage.
  • Where Sulphur (S) is required, choose a product from our product list with similar N, P, K contents to the products recommended above, and apply. The Teagasc recommended level for silage is 20 units/S/acre/per year. For more information on Sulphur go to Fertiliser index system page.