{"disclaimer":"Always check with your agronomist before acting.","notice":"General information only. Prices are null unless you supply them (prices=slug:$/t or p_<slug>=$/t) or an indicative listing exists (granular urea only). Ranking is sponsor-blind and price-blind unless you price all top-3 products. Loss percentages are ranges from published Australian studies; see /api/v1/compare for references.","params":"crop (wheat|barley|oats|canola|other), soil (sand|sandy-loam|loam|clay-loam|clay), ph, lime=1, method (surface|incorporated), nRate kg N/ha, area ha, prices=slug:$/t,..., grainPrice $/t","inputs":{"crop":"wheat","soil":"loam","ph":6.5,"calcareous":false,"method":"surface","nRate":50,"area":null,"prices":{},"grainPrice":null},"headline":{"surfaceUreaLossKgNPerHa":0,"surfaceUreaDollarsLostPerHa":null,"kgNPerTonneGrain":40,"breakEvenExtraGrainKgPerHa":null,"grainPriceUsedPerTonne":400,"grainPriceIsExample":true},"recommendations":[{"rank":1,"slug":"cal-am","name":"Cal-Am (calcium ammonium nitrate)","brand":"Incitec Pivot Fertilisers","category":"Nitrogen + Calcium","analysisPercent":{"N":27,"P":0,"K":0,"S":null,"Ca":8,"Mg":null,"Zn":null,"Cu":null,"B":null},"npkS":"27-0-0-?","suitability":"Good","volatilisationRisk":"Very low","rankingScore":1.9,"reason":"Cal-Am (calcium ammonium nitrate) has 27% nitrogen. Spread on top on loam, we expect very little nitrogen to be lost as ammonia gas. Part nitrate, so it is not prone to ammonia loss.","cautions":["Nitrate/ammonium nitrate: no gaseous loss expected except on highly calcareous soils (DPIRD 1994)."],"rules":["Nitrate/ammonium nitrate: no gaseous loss expected except on highly calcareous soils (DPIRD 1994)."],"lossPercentOfN":{"low":0,"mid":0,"high":0},"productKgPerHa":185.18518518518516,"pricePerTonneAud":null,"priceIsIndicative":null,"costPerHaAud":null,"costPerKgNAud":null,"effectiveCostPerKgNAfterLossAud":null,"buy":{"url":"https://www.incitecpivotfertilisers.com.au/find-a-location/","label":"Find a stockist","kind":"brand","rel":"sponsored noopener","target":"_blank"},"productPage":"/products/cal-am"},{"rank":2,"slug":"green-urea-nv","name":"Green Urea NV","brand":"Incitec Pivot Fertilisers","category":"Nitrogen","analysisPercent":{"N":46,"P":0,"K":0,"S":0,"Ca":null,"Mg":null,"Zn":null,"Cu":null,"B":null},"npkS":"46-0-0-0","suitability":"Fair","volatilisationRisk":"Low","rankingScore":4.05,"reason":"Green Urea NV has 46% nitrogen. Spread on top on loam, expect to lose roughly 4% of the nitrogen to the air (range 0–15%). It is urea treated with a urease inhibitor (NBPT), which on average roughly halves the loss from spreading on the surface.","cautions":["Acidifying fertiliser (DPIRD 1994); monitor soil pH over time."],"rules":["Surface urea scenario \"Australian average, in-crop top-dressing\" × 0.5 (NBPT reduces loss by about half on average; field results vary).","Acidifying fertiliser (DPIRD 1994); monitor soil pH over time."],"lossPercentOfN":{"low":0,"mid":4.05,"high":14.5},"productKgPerHa":108.69565217391303,"pricePerTonneAud":null,"priceIsIndicative":null,"costPerHaAud":null,"costPerKgNAud":null,"effectiveCostPerKgNAfterLossAud":null,"buy":{"url":"https://www.incitecpivotfertilisers.com.au/products/smart/nitrogen-retention/green-urea/","label":"View at manufacturer","kind":"product","rel":"sponsored noopener","target":"_blank"},"productPage":"/products/green-urea-nv"},{"rank":3,"slug":"easy-n","name":"Easy N (liquid nitrogen)","brand":"Incitec Pivot Fertilisers","category":"Nitrogen","analysisPercent":{"N":42.5,"P":0,"K":0,"S":0,"Ca":null,"Mg":null,"Zn":null,"Cu":null,"B":null},"npkS":"42.5-0-0-0","suitability":"Caution","volatilisationRisk":"Moderate","rankingScore":6.42,"reason":"Easy N (liquid nitrogen) has 42.5% nitrogen. Spread on top on loam, expect to lose roughly 6% of the nitrogen to the air (range 0–22%). A liquid, so you need a boom sprayer or liquid system; its loss sits between urea and ammonium sulphate.","cautions":["UAN-type liquid sits between urea and ammonium sulphate (Turner et al. 2012: urea > UAN > AS). Modelled as 0.75 × urea. UNVERIFIED: the factor is our assumption."],"rules":["UAN-type liquid sits between urea and ammonium sulphate (Turner et al. 2012: urea > UAN > AS). Modelled as 0.75 × urea. UNVERIFIED: the factor is our assumption."],"lossPercentOfN":{"low":0,"mid":6.074999999999999,"high":21.75},"productKgPerHa":117.64705882352942,"pricePerTonneAud":null,"priceIsIndicative":null,"costPerHaAud":null,"costPerKgNAud":null,"effectiveCostPerKgNAfterLossAud":null,"buy":{"url":"https://www.incitecpivotfertilisers.com.au/products/enhanced/easy-liquids/easy-n/","label":"View at manufacturer","kind":"product","rel":"sponsored noopener","target":"_blank"},"productPage":"/products/easy-n"}],"otherOptionsConsidered":[{"rank":4,"slug":"gran-am","name":"Gran-Am (ammonium sulphate)","brand":"Incitec Pivot Fertilisers","category":"Nitrogen + Sulphur","analysisPercent":{"N":20.2,"P":0,"K":0,"S":24,"Ca":null,"Mg":null,"Zn":null,"Cu":null,"B":null},"npkS":"20.2-0-0-24","suitability":"Caution","volatilisationRisk":"Low","rankingScore":6.63,"reason":"Gran-Am (ammonium sulphate) has 20.2% nitrogen. Spread on top on loam, expect to lose roughly 4% of the nitrogen to the air (range 0–15%). It also supplies sulphur (24% S), but has less N per tonne.","cautions":["Surface ammonium sulphate on non-calcareous soil: less than half the loss of urea (GRDC 2021); modelled as 0.5 × urea, an upper-bound simplification.","Acidifying fertiliser (DPIRD 1994); monitor soil pH over time."],"rules":["Surface ammonium sulphate on non-calcareous soil: less than half the loss of urea (GRDC 2021); modelled as 0.5 × urea, an upper-bound simplification.","Acidifying fertiliser (DPIRD 1994); monitor soil pH over time."],"lossPercentOfN":{"low":0,"mid":4.05,"high":14.5},"productKgPerHa":247.52475247524754,"pricePerTonneAud":null,"priceIsIndicative":null,"costPerHaAud":null,"costPerKgNAud":null,"effectiveCostPerKgNAfterLossAud":null,"buy":{"url":"https://www.incitecpivotfertilisers.com.au/products/foundational-fertilisers/incitec-pivot-foundational/nitrogen/","label":"View at manufacturer","kind":"product","rel":"sponsored noopener","target":"_blank"},"productPage":"/products/gran-am"},{"rank":5,"slug":"granular-urea","name":"Granular Urea","brand":"Incitec Pivot Fertilisers","category":"Nitrogen","analysisPercent":{"N":46,"P":0,"K":0,"S":0,"Ca":null,"Mg":null,"Zn":null,"Cu":null,"B":null},"npkS":"46-0-0-0","suitability":"Caution","volatilisationRisk":"Moderate","rankingScore":8.1,"reason":"Granular Urea has 46% nitrogen. Spread on top on loam, expect to lose roughly 8% of the nitrogen to the air (range 0–29%). The most concentrated and widely used nitrogen product, so you cart and spread less per kg of N. Losing less N is easiest by banding it in or applying just before rain.","cautions":["Acidifying fertiliser (DPIRD 1994); monitor soil pH over time."],"rules":["Surface urea: scenario \"Australian average, in-crop top-dressing\" 0–29% (mid 8.1%).","Acidifying fertiliser (DPIRD 1994); monitor soil pH over time."],"lossPercentOfN":{"low":0,"mid":8.1,"high":29},"productKgPerHa":108.69565217391303,"pricePerTonneAud":820,"priceIsIndicative":true,"costPerHaAud":89.13043478260869,"costPerKgNAud":1.7826086956521738,"effectiveCostPerKgNAfterLossAud":{"low":1.7826086956521738,"mid":1.939726545867436,"high":2.5107164727495404},"buy":{"url":"https://www.incitecpivotfertilisers.com.au/products/foundational-fertilisers/incitec-pivot-foundational/nitrogen/","label":"View at manufacturer","kind":"product","rel":"sponsored noopener","target":"_blank"},"productPage":"/products/granular-urea"}],"sponsorBlind":true}