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December 2017

Dec 22
Ammonium Sulphate - AMS

PROPERTIES OF AMMONIUM SULPHATE – AMS

By FERTILIZER PRODUCTS, Nitrogen Products, Sulphur Products No Comments

All figures quoted should be considered as a typical product analysis and may vary due to manufacturing process and raw materials. PHYSICAL PROPERTIES  A fine white crystalline product. Crystal colour may vary from white – yellow to blue – green and brown due to impurities. Granular forms may be produced by compaction, chipping or crystal growth. Particle size distribution of granular product typically ranges from 2.0 – 5.5mm. Critical Relative Humidity @ 30°C: 79.2. Solubility at 20°C: 75.4g / 100ml of water. CHEMICAL PROPERTIES Chemical formula: NH4SO4. 21% Nitrogen (N). N in the Ammonium (NH4+)form. 24 % Sulphur (S). S is in Sulphate (SO4–) form. Acidification index: 7.14 kg pure lime/kg N or 1.5kg pure lime per kg ammonium sulphate applied. Salt index: 69 (relative to Sodium Nitrate @ 100) AGRONOMIC BENEFITS & CAUTIONS N immediately available for plant uptake. N losses due to volatilization are very low. Ammonium  – N doesn’t leach due to its positive charge. S is immediately available for plant uptake. Highly soluble and may be put through irrigation systems. The most acidifying N source and should be used with caution on acidic soils. May be used beneficially to drop the pH in alkaline soils and improve availability of micro nutrients. Compatible for blending with MAP, LAN, Urea, Potassium Chloride. Please note: Consult a qualified person (Act 36 of 1947) for specific applications / recommendations.

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Dec 19

Dr Neil Miles consulting soil scientist

By Conferences and Training No Comments

Neil Miles is a consulting soil scientist based in Mount Edgecombe. Prior to entering into consultancy, he spent 28 years with the KZN Department of Agriculture, as a research scientist and research manager, followed by 10 years in research and advisory work with the South African Sugarcane Research Institute (SASRI). Neil played a leading role in the development of both the Cedara Fertilizer Advisory Service and SASRI’s Fertiliser Advisory Service (FAS). His PhD, through the University of Natal, focused on the nutrition of intensive pastures.  Neil’s particular interests are soil health and the nutrition of crops and pastures. Contact Neil: milesofsoil@gmail.com    

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Dec 03
Limestone Ammonium Nitrate - LAN(28)

PROPERTIES OF LIMESTONE AMMONIUM NITRATE – LAN(28)

By FERTILIZER PRODUCTS, Nitrogen Products No Comments

All figures quoted should be considered as a typical product analysis and may vary due to manufacturing process and raw materials. PHYSICAL PROPERTIES A light / dark grey granular product. Particle shape typically spherical to oblong. Particle size distribution typically ranging from 2.0 – 5.5mm. Critical Relative Humidity @ 30ºC: 59.4 – 65, variance is dependant on chemical stabilisers and coatings used in the production process. Critical Thermal Cycling temperature: 30 – 35ºC; manufacturers specification is normally printed in the bag. Store in a cool dry shed out of direct sunlight. CHEMICAL PROPERTIES 28% Nitrogen (N). N concentration may not exceed 28% in compliance with the Explosives Act (Act 26 of 1956). 14 % N in Nitrate (NO3–) form and 14% N in Ammonium (NH4+) form. Ca content: 3.95 – 4.8% Mg Content: 1.6 – 2.6% Acidification index: 1.12 kg pure lime/kg N or 0.32kg pure lime per kg LAN Salt index: 84 (versus Sodium Nitrate @ 100) AGRONOMIC BENEFITS The N in LAN is immediately available for plant uptake. Research has shown that the 1:1 ratio of Ammonium – N to Nitrate – N as supplied by LAN is the ideal ratio for plant uptake in maize production. LAN contains calcium and magnesium and is less acidifying to the soil than other forms of N. LAN is less prone to N losses through leaching and volatilization than urea. Compatible for blending with MAP, Potassium Chloride, Potassium Sulphate, Potassium Nitrate and Ammonium Sulphate. Please note: Consult a qualified person (Act 36 of 1947) for specific applications / recommendations.  

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