P & K Fertiliser Choice - Teagasc

P & K Fertiliser Choice - Teagasc

P & K Fertiliser Choice Fertiliser Products Timings of Application Suggested Programmes Complete a Farm Fertiliser Plan to Determine Actual Farm N & P Allowances Types of Fertiliser.. Re think Req.! 16% Super P MOP 50% K 18-6-12 0-7-30 0-10-20 / 10-10-20 23-10-0 15-10-10 14-7-14 13-6-20 25-5-0 27-2.5-5 24-2.5-10 16% Super P(50kg bag) Contains:- 16 units P 18 6 12 (50kg bag) Contains:- 18 units N - 6 units P - 12 units K 23 10 0 (50kg bag) Contains:- 23 units N - 10 units P Now Req. Complete a Farm Fertiliser Plan to Determine Actual Farm N & P Allowances Fertiliser Compound Options. Situation Fertiliser Type Grazing Silage / Maize Build Up Fertiliser Blends 10-10-20 / 18-6-12 / 18-4-12 / 14-7-14 / 15-10-10 / 27-2.5-5 / 24-2.5-10 / DAP (18N & 20 P) / 25-5-0 0-7-30 / 10-10-20 / 13-6-20 / 15-3-20 / 27-2.5-5 / 24-2.5-10 10-10-20 / MOP 50% K / 16% Super P / 0-7-30 / 0-10-20 / 23-10-0 Any Fertiliser can be made Max. 40 units in 50kg bag Complete a Farm Fertiliser Plan to Determine Actual Farm N & P Allowances Nitrogen Sources N Type %N

Cost / kg Urea 46% 0.80c Urea + NBPT 46% 0.85c CAN 27% 0.95c Protected Urea products N% P% K% S% 46 0 0 0 38 0 0 7 29 0 14 3.5 Complete a Farm Fertiliser Plan to Determine Actual Farm N & P Allowances -- LLoo w w PP //KK H Hiigg hh N N H Hiigg hh N N H

Hiigg C Coo hh PP//KK m m ((5500 ppoouunn % % oo dd ff PP )) -- LLoo w w PP //KK Fertiliser programmes (P, K & S) Standard compounds for Index 3 situation P: 50% early 50% split in summer Sulphur Jan Feb Apr High P N-0-K compound / Straight K Low P and K higher rates / Slurry May Jun Jul Aug Sep Oct Nov Dec K t ra Ex P t ra Ex High K N-P-0 compound Mar Products: K:P ratio of 2:1 3:1 ideal for grazing Slurry or K:P 4:1 6:1 ideal for silage Adjust based on soil tests, crops, stocking rates Complete a Farm Fertiliser Plan to Determine Actual Farm N & P Allowances

K Advice & Grassland Grazing Ground Low K requirements (animal recycling) Apply index 3 rates to avoid Grass Tetany Apply build up rates in Sept / Oct Silage Ground High K requirements Max. 90 kg K/ha Apply build up rates Sept / Oct Target cattle slurry to silage fields Complete a Farm Fertiliser Plan to Determine Actual Farm N & P Allowances New P Allowances & Tailoring a Fertiliser Programme Suggested Fertiliser programmes Many combinations Availability of products Complete a Farm Fertiliser Plan to Determine Actual Farm N & P Allowances New Fertiliser P Allowances Grassland Stocking Rate (kg/ha) P Index 1 2 3 4 131 - 170 63 43 13 0 171 - 210 66 46 16 0 211 - 250 66 46 16 0 >250

69 49 19 0 50kg P/ha @ Index 1 30kg P/ha @ Index 2 1. Adjust for Conc. Feed (5kg/ton) 2. Slurry Removed from calculations Complete a Farm Fertiliser Plan to Determine Actual Farm N & P Allowances New Fertiliser P Allowances P Rates adjusted for 1t/ha Conc. Feed (5kg/ton) Grassland Stocking Rate (kg/ha) P Index 1 2 3 4 131 - 170 58 38 8 0 171 - 210 61 41 11 0 211 - 250 61 41 11 0 >250 64 44 14 0

Complete a Farm Fertiliser Plan to Determine Actual Farm N & P Allowances Example Dairy - N, P & K Rates P Rates adjusted for 1t/ha Conc. Feed (5kg/ton) Stocking Rate 131 170 kg Org N/ha P & K Index N P K Kg/ha (units/ac) 1 206 (165) 58 (46) 90 (72) 2 206 (165) 38 (30) 60 (48) 3 206 (165) 8 (6) 30 (24) 4 206 (165) 0 0 Complete a Farm Fertiliser Plan to Determine Actual Farm N & P Allowances Suggested Fertiliser Programmes The following are a number of suggested fertiliser programmes based on new P allowances. Prepare a farm fertiliser plan to determine field N, P & K allowances Formulate fertiliser programmes base on the following Soil Types ( heavy / light / peaty) Fertilisers should be applied as follows to reduce nutrient losses: Select the Right Product At the Right Rate At the Right Time In the Right Place Protected Urea referred to as Urea+ in example fertiliser programmes in slides 12 tom 23. Refer to slide 4 for different protected urea formulations Example Grazing Ground & Fertiliser Programme

SR 131 170 kg Org N/ha (P & K Index 1)* Advice March April May June / July Sept Product (units/ac) 1.25 23-10-0 2.0bag 18s 1.75bag 18s/ac 2.0bag 18s ~0.5bag Urea + N Splits 29 42 34 35 25 N 165 29 36 32 36 27 P 46 12 12 10 12 46

K 72 24 21 24 69 S 6-12 6 6 12 Protected- Urea (Urea +NBPT) +/- S can be used as an alternative to CAN or Sul-CAN Total 160 Example Grazing Ground & Fertiliser Programme SR 131 170 kg Org N/ha (P & K Index 3)* - Peat Soil Advice March April May June / July Sept Product (units/ac) 1 bag/ac 27-2.5-5 1.5 bag/ ac 272.5-5 0.9 bag/ac Urea + 38% N & 7% S 0.9 bag/ac Urea + 38% N & 7% S 0.9 bag/ac Urea + 29% N & 14% K N Splits

29 42 34 34 25 N 165 27 42 34 34 26 P (3) 6 2.5 3.5 K 24 5 7.5 S 6-12 Tot al 166 6 6 6 Protected- Urea (Urea +NBPT) +/- S can be used as an alternative to CAN or Sul-CAN 14 60 3.5 15 Example Grazing Ground & Fertiliser Programme SR 131 170 kg Org N/ha (P & K Index 1)* Advice Product (units/ac)

Feb March April May June / July Sept 1 bag/ac Urea + 1.8 bag/ac 18-6-12 1.4bag/ ac 23-10-0 0.5bag /ac Urea + 27 38 32 32 25 38 32 32 23 11 14 1.25 CS @ 1,500g/ac bag/ac 23-100 N Splits N 165 11 29 P 46 4

12 K 72 43 S 6-12 2 7 Tota l 165 41 22 75 5 14 Protected- Urea (Urea +NBPT) +/- S can be used as an alternative to CAN or Sul-CAN Example Grazing Ground & Fertiliser Programme SR 131 170 kg Org N/ha (P & K Index 2)* Advice Product (units/ac) Feb March 1.25 bag CS @ 1,500g/ac 23-10-0 April May June / July Sept ~1.0 bag Urea + 1.25bag 23-10-0 0.9 bag Urea + 0.5 bag Urea + N Splits

23 27 42 34 34 27 N 165 14 29 41 29 34 27 P 30 4 12.5 K 48* 43 S 6-12 2 Total 174 29 12.5 58 7 6 Protected- Urea (Urea +NBPT) +/- S can be used as an alternative to CAN or Sul-CAN 15 Example Dairy - N, P & K Rates P Rates adjusted for 1t/ha Conc. Feed (5kg/ton) Stocking Rate 210 250 kg Org N/ha P&K Index

N P K 1 250 (200) 61 (49) 100 (80) 2 250 (200) 41 (33) 70 (56) 3 250 (200) 11 (9) 40 (32) 4 250 (200) 0 0 Kg/ha (units/ac) N & K Advice as per the Teagasc Green Book, 2016 Complete a Farm Fertiliser Plan to Determine Actual Farm N & P Allowances Example Grazing Ground & Fertiliser Programme SR 210-250 kg Org N/ha (P & K Index 1)* Advice Feb March April May June Aug Sept Product (units/ac) bag Urea +

2.0 bag 18s/ac 2.0 bag 18s/ac 0.7 bag 1.25bag/ac Urea + 23-10-0 1.0bag/ac 23-10-0 0.4 bag/ac Urea + N Splits 23 32 40 27 27 27 20 23 36 36 27 28 23 27 10 N 200 P 49 12 12 13 K 80 24 24 21

S 10-15 5 5 5 Protected- Urea (Urea +NBPT) +/- S can be used as an alternative to CAN or Sul-CAN Tota l 200 47 69 15 Example Grazing Ground & Fertiliser Programme SR 210-250 kg Org N/ha (P & K Index 3) Peat Soil Advice Feb March April May June Aug Sept Product (units/ac) bag Urea + 0.85bag/ac Urea + 38% N & 7% S 2.2 bag/ac 18-4-12 0.7bag/ac Urea + 38% N & 7% S 0.6bag/ac Urea + 46% N 0.7bag/ac Urea + 38% N & 7% S 0.4 bag/ac

Urea + N Splits 23 32 40 27 27 27 20 23 32 40 27 28 23 27 Total N 200 P 9 9 9 K 24 26 26 S 10-15 6 5 5 Protected- Urea (Urea +NBPT) +/- S can be used as an alternative to CAN or Sul-CAN 200 16

Example Grazing Ground & Fertiliser Programme SR 210-250 kg Org N/ha (P & K Index 1)* Advice Feb March April May June Aug Sept Product (units/ac) CS @ 1,500g/a c 2 bag/ac 23-10-0 1.5 bag/ac 27-2.5-5 1bag/ac 27-2.5-5 1bag/ac 27-2.5-5 1.2bag/ac 23-10-0 0.75 bag/ac 27-2.5-5 N Splits 23 34 41 27 27 28 20 Total N 200 14 43 41

27 27 28 20 200 P 49 4 20 4 2.5 2.5 12 2.5 48 K 80 43 0 7.5 5 5 0 5 66 S 1015 2 4.5 3 3 2 15 Protected- Urea (Urea +NBPT) +/- S can be used as an alternative to CAN or Sul-CAN Example Grazing Ground & Fertiliser Programme SR 210-250 kg Org N/ha (P & K Index 2)*

Advice Feb Product (units/ac) CS @ 1,500g/a c N Splits 23 35 March April May June Aug Sept 0.8bag/ ac Urea + 0.8bag /ac Urea + 1bag/ac 23-100 0.bag/ac Urea + 40 30 30 22 20 40 30 30 23 20 1.8bag/ac 0.9bag/ac 23-10-0 Urea + Tota l N

200 15 41 P 33 4 18 10 32 K 56 43 0 0 43 S 1015 2 5 5 Protected- Urea (Urea +NBPT) +/- S can be used as an alternative to CAN or Sul-CAN 5 199 17 Example Drystock - N, P & K Rates P Rates adjust for 1t/ha Conc. Feed (5kg/ton) Stocking Rate 131 170 kg Org N/ha P& K Index N P K 1 160 (128) 58 (46) 75 (60) 2

160 (128) 38 (30) 45 (36) 3 160 (128) 8 (6) 15 (12) 4 160 (128) 0 0 Kg/ha (units/ac) N & K Advice as per the Teagasc Green Book, 2016 Complete a Farm Fertiliser Plan to Determine Actual Farm N & P Allowances Example Grazing Ground & Fertiliser Programme SR 131 170 kg Org N/ha (P & K Index 1)* Advice March April May June / July Sept Product (units/ac) 2.0bag/ac 18-6-12 1.2 bag/ac 23-10-0 1.1 bag/ac 18-6-12 0.9bag/ac 23-10-0 0.8 bag/ac 18-6-12 N Splits 45 28 20

20 15 N 128 36 28 20 20 15 128 P 46 12 12 7 9 5 45 K 60 24 13 10 47 S 6-12 6 4 2 12 Protected- Urea (Urea +NBPT) +/- S can be used as an alternative to CAN or Sul-CAN Total Example Grazing Ground & Fertiliser Programme SR 131 170 kg Org N/ha (P & K Index 2)* Advice Feb

March April May June / July Sept Product (units/ac) CS @ 1,500g/ac 1.0 bag/ac 23-10-0 0.7bag/ac Urea + 1.0 bag/ac 23-10-0 0.5 bag/ac 23-10-0 0.5bag/ac CAN N Splits 23 33 24 16 16 16 N 128 14 23 32 23 12 24 P 30 4 10

10 5 K 45 43 S 6-12 Tot al 128 29 43 3 4 3 Protected- Urea (Urea +NBPT) +/- S can be used as an alternative to CAN or Sul-CAN 3.5 12 1st Cut Grass Silage N, P & K Req. (5tDM/ha) Nutrient Requirements 1 t Grass DM Req. 4kg P & 25kg K Soil N Index (kg/ha) 1 125 P (kg/ha) 40 K *(kg/ha) 175 Fertiliser Options No Slurry Cattle Slurry @ 3,000ga/ac 3.5 bags/ac 13-6-20 1.4 bags/ac Urea 38% N +S 3.0 bags/ac 27-2.5-5 +S 2 125 30

155 3.0 bags/ac 13-6-20 1.6 bags/ac Urea 38% N +S 3.0 bags/ac 27-2.5-5 +S 3 125 20 125 3.0 bags/ac 13-6-20 1.4 bags/ac Urea 38% +S 3 bags/ac CAN +S Apply 1 bag/ac 0-7-30 every 2 / 3 years 4 125 0 0 2.6 bags/ac Urea 38% N +S 2.6 bags/ac Urea 38% N +S *Apply P & K balance after 1st cut (June / July / Aug) Protected- Urea (Urea +NBPT) +/- S can be used as an alternative to CAN or Sul-CAN In Summary Apply 50% of P in Spring Watch K rates Select suitable fertiliser compounds Compound fertilisers required each round (18s / 24s / 27s / 23-10-0) Replace CAN 27% N with Urea + NBPT Apply 10 to 15units/ac S Complete a Farm Fertiliser Plan to Determine Actual Farm N & P Allowances

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