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Grassland Recommendations
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WINTER WHEAT
Assuming continuous winter feed wheat planted into
soil N Index 1 and index 3 for both P and K. Target
yield of 10ton/ha and straw removed.
Maximum Crop fertilizer rates
N = 230kg/Ha, P = 38KG/Ha, K = 100kg/Ha
For every 1 ton target yield increase/decrease make
allowance: +/- 20kg/ha N, 3.8kg/ha P & 9.8kg/ha K. |
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SPRING BARLEY
Assuming continuous spring barley planted into a
soil of N Index & Index 3 for both P & K. Target yield
7.5 ton/ha & straw removed.
Maximum Crop fertilizer application rates
N = 155kg/ha, P = 28.5kg/ha, K = 85kg/ha
For every 1 tonne yield increase/decrease make
allowance
+/- 20kg/ha N, 3.8kg/ha P & 11.4kg/ha K |
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MAIZE
Assuming continuous cropping with soil N Index 1
and soil Index 3 for P & K.
Maximum Crop fertilizer rates
N = 180kg/ha, P = 40kg/ha & K = 190kg/ha
(1,000 gallons of good quality cattle slurry is equivalent
to one 50kg bag of 8-5-39) |
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FIRST CUT SILAGE
Assuming soil index 3 for both P and K
Maximum crop requirement
N = 125kg/Ha, P = 20kg/Ha, K = 120kg/Ha
SECOND CUT SILAGE
N = 100kg/ha, P = 10kg/ha & K = 35kg/ha |
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GRAZING
Assume a Dairy enterprise feeding 500kg
concentrate/head/annum. P & K application: - assume
Index 3 for P & K.
Assuming a stocking rate of 2 cows/ha, the maximum
requirements would be:
201kg N/ha, 9kg P/ha and 30kg K/ha.
Assuming a stocking rate of 2.5 cows/ha, the maximum
requirements would be:
306 kg N/ha, 13 kg P/ha and 35 kg K/ha.
The above N, P & K levels will vary according to
individual stocking rates, concentrate feed and soil index. |
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- Soil Testing: To achieve optimum fertilizer efficiency a soil
test should be carried out every 3-5 years to determine
accurate nutrient requirements, imbalances and pH status.
- To calculate kg/ha to units/ac multiply by 0.8.
- For Grazing & Silage ground increase P application by
20kg/ha in Index 1 and by 10kg/ha in Index 2.
- Reseeding: An additional 15kg P/ha can be applied at soil
P index's 1-3 for pasture establishment.
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Soil P & K Index System
| Soil Index |
Index Description |
Response to fertilizer |
| 1 |
Very Low |
Definite |
| 2 |
Low |
Likely |
| 3 |
Medium |
Unlikely |
| 4 |
Sufficient |
None |
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Optimum Soil pH
| Crop |
pH |
| Grass |
6.3-6.5 |
| Cereals |
6.5 |
| Potatoes |
6.0 |
| Clover, Beet, peas, beans,
oil seed rape |
7.0 |
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- These recommendations are for typical example only. All Fertilizer applications should be carried out within the limits of the Nitrates Directive. Consult your agricultural advisor for specific recommendations and allowances to your enterprise. Grassland Fertilizers accept no liability or responsibility for any consequential loss or damage or any loss of value, profit, business, revenue, goodwill, yields or production which may arise by reference to any recommendation or information given in this leaflet.
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