2 results for group: fertilizers-and-remineralizers


Mineral Sources of Potassium for Plant Nutrition

Recently published assessments of nutrient budgets on a national basis have shown that K deficits for developing countries are so substantial that a doubling of world production of potash fertilisers would be required to balance inputs and offtake, simply to meet demands in Africa alone. The price of potassium fertiliser raw materials has increased by a factor of 4 during 2007–2009, approaching $1000 per tonne in some markets. Thus an annual investment of the order of US$5600 million is required to replenish soil K stocks in Africa. In this context it is appropriate to review current knowledge of alternative sources of K, which is the seventh most ...

LEGAL STANDARDIZATION OF THE USE OF REMINERALIZERS: LIMITATIONS AND PERSPECTIVES

This paper addresses the issue of the legal framework of fertilizers in Brazil (Federal Law nº 6.894/1980) as well as other regulatory instruments – Decrees and Normative Instructions – that aim for its regulation. Specifically, it addresses the need to amend this legal framework, since it does not provide for or does not allow the commercialization and use of enriched rock dust in order to positively influence the fertility of the soil, as established by Remineralization technology. It shows the process of amending the fertilizers law and how this might affect the sovereignty of the country, one of the largest importers of inputs for ...