Agricultural Development and Advisory Service

After Flarvest. How do the memory effects shown by the other crops compare with those of winter wheat Winter wheat did not show a memory effect after one year, but oilseed rape does seem to do so. Researchers of the Agricultural Development and Advisory Service found that nitrate production by microbes in the soil after a rape crop increased with the amount of fertilizer given to the crop (R. Sylvester-Bradley, personal communication). One reason may lie in this crop s habit of shedding its leaves as harvest approaches, which means that the microbes in the soil get early access to these residues. This habit might contribute to the apparently smaller efficiency of this crop in using nitrogen fertilizer. The crop may be just as efficient as winter wheat at taking up the fertilizer but drops... 

Regular soil analysis is also important for checking the levels of the important nutrients - phosphorus, potassium, calcium and magnesium. Care should be taken to confirm the method of analysis, because the Scottish system and that carried out by organic laboratories and by Agricultural Development and Advisory Service (ADAS) laboratories have different standards. For instance, on the Scottish system, very low for potassium (the lowest level) is less than 40, whereas the... 

Ministry Of Agriculture, Fisheries and Food Agricultural Development and Advisory Service, London. 

Ministry of Agriculture, Fisheries and Food, Technical Bulletin 27, The Analysis of Agricultural Materials, A Manual of the Analytical Methods used by the Agricultural Development and Advisory Service, Her Majesty s Stationery Office, London, 1973. 

Lloyd, G.A., J.V. Cross, G.J. Bell, A.M. Berrie and S.W. Samuels (1995). Orchard Sprayers Comparative Operator Exposure and Spray Drift Study, Agricultural Development and Advisory Service, Harpenden, Hertfordshire, UK. 

GOSTICK K.G. 1982. Agricultural Development and Advisory Services (ADAS) recommendations to farmers on manure disposal and recycling. Philosophical Transactions of the Royal Society of London, Series B, 296, 329-332. 

Agricultural Development Advisory Service (ADAS) (1979) Ammonium Nitrate and Nitrite-Nitrogen, Potassium Chloride Extractable, in Moist Soil (Method 60). In The Analysis of Agricultural Materials, KB 427, Second Edition, HMSO, London, UK. 

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