Step 1 - Decide on your YIELD POTENTIAL EXAMPLE: (Soil indices @ SNS 1, P 2, K 2- & Mg 2) Working on an average of 40 t/ha my maize crop requires... N P K MgO SO₃ 125 55 175 30 60 Step 2 - Choose your STARTER FERTILISER EXAMPLE: Maize Fix 3 (5N-14P-34K+ 4MgO + 8SO3) down the spout @ 360 kg/ha will apply Step 3 - Choose your MAIN FERTILISER depending on ORGANIC MANURE USAGE EXAMPLE: Planning on applying 25 m³/ha of cattle slurry in late spring and incorporating within 24 hours giving Step 4 - Choose your FINAL FERTILISER EXAMPLE: Looking at final requirements, a top up dressing of nitrogen should be applied no later than 3 leaf stage after weed control. 27N - 9SO₃ applied @ 312 kg/ha will supply the reaming balance. N 18 P K MgO SO₃ 44 122 14.5 29 N 23 P K MgO SO₃ 30 63 15 3
N 84
P 0
K 0
MgO SO₃
0
28
Actual nutrients applied:-
N
P
K
MgO SO₃
125
74
185
29.5
60
Following these guidelines carefully will ensure you get the most out of your maize crop and adhere to the legislation regarding organic manures and nitrogen.
19 Maize Handbook 2018
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