01863cam a2200325 a 45000010008000000030008000080050017000160080041000330100017000740200015000910400027001060410011001330500022001440820020001661110310001862450098004962600074005943000033006683650016007014900053007175000024007705000441007945000053012355040029012886500029013176500034013466500029013807100075014097100053014841406199BD-DhUL20150113180454.0830615s1983    ne a     b    100 0 eng    a   83013094   a9024728665  aDLCcDLCdDLCdBD-DhUL0 aengfre00aS631.3b.S96 198300a631.81219bUNE2 aSymposium on Research into Agro-technical Methods Aiming at Increasing the Productivity of Crops--Co-efficients for the Most Efficient Use of Fertilizer Nutrients and Means for Reducing the Losses of Nutrients to the Environment under the Conditions of Intensive Agricultured(1983 :cGeneva, Switzerland)10aEfficient use of fertilizers in agriculture /cUnited Nations Economic Commission for Europe.  aBoston :bMartinus Nijhoff/Dr. W. Junk for the United Nationscc1983.  avi, 352 p. :bill. ;c25 cm.  aUS$b275.94 0aDevelopments in plant and soil sciences ;vv. 10  aEnglish and French.  a"Proceedings of the Symposium on Research into Agro-technical Methods Aiming at Increasing the Productivity of Crops--Co-efficients for the Most Efficient Use of Fertilizer Nutrients and Means for Reducing the Losses of Nutrients to the Environment under the conditions of Intensive Agriculture; organized by the Agriculture Section of the United Nations Economic Commission for Europe; held at Geneva, Switzerland, 17-21 January 1983."  a"United Nations Economic Commission for Europe."  aIncludes bibliographies. 0aFertilizersxCongresses. 0aCropsxNutritionxCongresses. 0aCrop yieldsxCongresses.2 aUnited Nations.bEconomic Commission for Europe.bAgriculture Section.2 aUnited Nations.bEconomic Commission for Europe.