Forms of Iron and Their Association with Soil Properties in Four Soil Taxonomic Orders of Arid and Semi‐arid Soils of Punjab, India

Profiles of arid and semi‐arid zones soils of Punjab, northwestern India, were investigated for different forms of iron (Fe): total Fe, diethylenetriamine penta‐acetic acid (DTPA)–extractable Fe, soil solution plus exchangeable Fe, Fe adsorbed onto inorganic sites and oxide surfaces, and Fe bound by organic sites. Irrespective of the different fractions of Fe present, its content was higher in the fine‐textured Alfisols and Inceptisols than in the coarse‐textured Entisols and Aridisols. Lower content of total Fe was observed in the surface horizon and then increased in the subsurface horizons, whereas no set pattern was observed in Entisols. Also, irrespective of the soil orders, the contents of different forms of Fe were higher in the surface horizon and then decreased by depth. None of the forms of Fe exhibited any consistent pattern of distribution. Organic matter and the content of clay and silt fractions had a strong bearing on the distribution of forms of Fe. Based on a linear coefficient of correlation, the soil solution plus exchangeable Fe adsorbed onto inorganic sites and DTPA‐extractable Fe increased with increase in soil organic carbon but decreased with increase in soil pH and calcium carbonate content. Total Fe increased with increase in cation exchange capacity (CEC) and clay and silt content. The results also revealed that there was equilibrium in different fractions of this element. Among the different Fe forms, Fe bound by organic sites, water‐soluble plus exchangeable Fe, and Fe adsorbed onto oxides (amorphous surfaces) were positively correlated with the DTPA‐extractable Fe. Though some forms are interrelated, none of the forms had any relationship with the total Fe.

[1]  J. Katyal,et al.  Changes in DTPA-iron and management of iron chlorosis in rice nurseries , 1982, Plant and Soil.

[2]  I. Pulford,et al.  Influence of waterlogging and lime or organic matter additions on the distribution of trace metals in an acid soil , 1981, Plant and Soil.

[3]  I. Pulford,et al.  Influence of waterlogging and lime or organic matter additions on the distribution of trace metals in an acid soil , 1981, Plant and Soil.

[4]  J. Katyal,et al.  A new technique of plant analysis to resolve iron chlorosis , 1980, Plant and Soil.

[5]  R. Kumar,et al.  Relationships Between Soil Characteristics and Total and DTPA-Extractable Micronutrients in Inceptisols of Punjab , 2004 .

[6]  S. Mukhopadhyay,et al.  Micronutrient distribution and their association with soil properties in Entisols of Punjab , 2002 .

[7]  N. Fageria,et al.  Micronutrients in Crop Production , 2002 .

[8]  S. Mukhopadhyay,et al.  Pedospheric attributes in distribution of total and DTPA-extractable Zn, Cu, Mn and Fe in Indo-Gangetic plains , 2000 .

[9]  D. S. Chahal,et al.  Distribution of different forms of iron in arid zone soils of Punjab, India , 1995 .

[10]  P. Sidhu,et al.  Distribution of micronutrients in arid zone soils of Punjab and their relation with soil properties , 1992 .

[11]  J. Katyal,et al.  DTPA-extractable and total Zn, Cu, Mn, and Fe in Indian soils and their association with some soil properties , 1991 .

[12]  P. Sidhu,et al.  Characteristics and classification of arid zone soils of Punjab, India , 1990 .

[13]  L. M. Shuman.  Effect of Liming on the Distribution of Manganese, Copper, Iron, and Zinc Among Soil Fractions1 , 1985 .

[14]  W. Lindsay.  Chemical equilibria in soils , 1979 .

[15]  W. Lindsay,et al.  Development of a DTPA soil test for zinc, iron, manganese and copper , 1978 .

[16]  A. Pal,et al.  Available Micronutrient Status of Shallow Black Soils of Madhya Pradesh , 1970 .

[17]  J. Hodgson.  Chemistry of the Micronutrient Elements in Soils , 1963 .

[18]  F. G. Viets.  Micronutrient Availability, Chemistry and Availability of Micronutrients in Soils , 1962 .