SLURRIES AND MANURES These contain significant quantities of plant nutrients, particularly potassium and nitrogen. Availability levels of P and K vary little but N availability varies greatly. N availability levels will vary due to housing system, storage system, application method, timings and manure type. Standard tables will give typical values however animal manure analysis will give a more accurate measure. FERTILISER SELECTION Having established the nutrient status of the soil and any organic manure inputs, a nutrient management plan can be generated to optimise production levels by fulfilling the requirement of the crop with the correct fertiliser. FOR MORE INFORMATION ON: ✚ Maize Kicka see page 41. ✚ Silage analysis see page 5. FERTILISER APPLICATION Fertiliser varies significantly in quality so it is essential that you use a quality product. This could either be a complex compound fertiliser (each nutrient contained within every granule) or a size matched blend. This will ensure even distribution across the bout width, otherwise known as the Coefficient of Variation (CV). The objective is to achieve a CV of 10%, above which there can be a major financial impact. It is important that spreaders are calibrated to minimise these effects. SPECIALIST FERTILISERS Various forage crops have specific requirements for nutrients and different fertilisers have different modes of action. Some speciality fertilisers have been developed by Agrii to satisfy these requirements. Agrii has developed a maize starter fertiliser called Kicka that is a basal fertiliser placed at drilling, delivering a nutrient package as follows: 18N, 20P, 27.5SO3 0.8% Zn plus Kicka and P-Reserve. P-RESERVE P-Reserve is another example of new technology developed to harness phosphate availability. It prevents phosphate ‘lock up’ by creating a protective coat, making water soluble phosphate fully available to the growing crop. P-Reserve is best used for phosphate responsive crops, e.g. maize and also in a grassland situation in the spring. The product is applied at the blending plant hence no on farm kit is required. It does not affect the physical characteristic of the fertiliser and biodegrades in the field after application. Origin Enhanced-N – or OEN – is a range of high quality, granular N, NS and NPK fertilisers available across the UK from Origin Fertilisers’ network of local production plants. OEN uses the power of NutriSphere-N® Nitrogen Fertiliser Manager to stabilise the nitrogen content, reducing the risk of losses from volatilisation, leaching and nitrification. How does Origin Enhanced Nitrogen work? By shielding nitrogen fertiliser from the soil enzymes and bacteria involved in volatilisation and nitrification, NutriSphere-N® holds more of the N supplied by OEN in the more stable ammonium form for longer. Holding nitrogen in its ammonium form for longer reduces losses to volatilisation. * These recommendations are for guidelines only. Please consult your FACTS Qualified Advisor for a detailed recommendation suitable for your situation. GRAZED GRASS ✚ Apply OEN 27.6.6 + 7.5 SO3 @ 180-250 kg/ha for each grazing cycle to suit grass requirements, stocking rates, etc.* ✚ Apply OEN 46N or OEN 40N + Se where soil PK levels are high or high levels of manures are being applied.* SILAGE ✚ Apply OEN 29.5.15 + 7 SO3 @ 380-430 kg/ha for first cut silage 6-8 weeks before cutting.* ✚ Apply OEN 28.0.18 + 10 SO3 @ 335-440 kg/ha for second cut silage immediately after first cut.* Agrii nutrition services Please contact customer services: e: t: 0845 6073322 Please contact customer services: e: t: 0845 6073322 33 CROP NUTRITION 32 CROP NUTRITION