Table (1)). For optimal plant growth, the LANS micronutrients can be combined with the macronutrients of the Hoagland solution. According to Hewitt iron is plant-available as ferric citrate or it may be supplied as ferric EDTA complex according to Jacobsen. The Long Ashton or Hewitt solution is widely used and is considered to be suitable for supporting normal growth of a range of different plant species. Hewitt's and Hoagland's solution formulations led to increased growth of nursery fig trees in high-tunnel and open-field conditions, respectively. Numerous current research papers on plant nutrition use these standard feeding recipes to grow plants, and frequently without explicit description of the recipes. Long Ashton International Symposia This series of international conferences was well respected and attended by scientists from every continent. 1967 – Recent aspects of nitrogen metabolism in plants 1969 – Physiology of tree crops 1971 – Fungal pathogenicity 1973 – Lactic acid bacteria in beverages and food 1975 – Environmental effects on crop physiology 1977 – Nitrogen assimilation of plants 1979 – Quality in stored and processed vegetables and fruit 1982 – Improving vegetatively propagated crops 1984 – Rational pesticide use 1986 – Hormone action in plant development — a critical appraisal 1989 – Herbicide resistance in weeds and crops 1991 – Transport and receptor proteins of plant membranes: molecular structure and function 1993 – Ecology and integrated farming systems 1995 – Plant roots — from cells to systems 1997 – Understanding pathosystems: a focus on Septoria 1999 – Biotechnology of cereals: tools, targets and triumphs 2002 – New frontiers in plant development: from genes to phenotype Notable former staff John Pilkington Hudson – director, horticultural scientist H. G. H. Kearns – deputy director Lawrence Ogilvie – plant pathologist A. F. Parker-Rhodes – plant pathologist Ralph Louis Wain – agricultural chemist Eric John Hewitt – plant physiologist See also Murashige and Skoog medium Hoagland solution References Ed. HM Anderson, JR Lenton, PR Shewry (2003). Long Ashton Research Station: One Hundred Years of Science in Support of Agriculture, University of Bristol. External links LARS Reunited: association for former employees and associates 1912 establishments in England 2003 disestablishments in England Agricultural research institutes in the United Kingdom Buildings and structures in North Somerset Cider Government research Science and technology in Somerset Agricultural organisations based in England