01762naa a2200205 a 450000100080000000500110000800800410001902400510006010000190011124501340013026000090026452011270027365000160140065000160141665000090143265000090144165300190145065300210146977300660149011916392022-06-06       2005    bl uuuu     u00u1 u    #d7 ahttps://doi.org/10.1080/019041605003110372DOI1 aFAGERIA, N. K.  aSoil fertility and plant nutrition research under controlled conditionsbbasic principles and methodology.h[electronic resource]  c2005  aIn modern agriculture, use of essential plant nutrients in adequate amounts and proper balance is one of the key components in increasing crop yields. Further, in developing crop production technologies, research work under field and controlled conditions is necessary to generate basic and applied information. In addition, research is very dynamic and complex due to variation in climatic, soil, and plant factors and their interactions. This demands that basic research information can only be obtained under controlled conditions to avoid or reduce effects of environmental factors on treatments. Hence, the objective of this article is to discuss basic principles and methodologies of research in soil fertility and mineral nutrition under controlled conditions. Topics discussed are soil and solution culture experimental techniques including, fertilizer application and planting, liming acid soils, experimental duration and observations, composition of nutrient solutions, preparation and sources of iron (Fe) in nutrient solutions, pH of nutrient solutions, and stable supply of nutrients in the solution culture.  afield crops  aroot growth  asoil  aSolo  aMineral Stress  aSolution culture  tJournal of Plant Nutritiongv. 28, n. 11, p. 1975-1999, 2005.