Communications in Soil Science and Plant Analysis, 2021
ABSTRACT A field experiment was initiated in 2013 with maize–wheat cropping system to study the e... more ABSTRACT A field experiment was initiated in 2013 with maize–wheat cropping system to study the effect of crop residue (CR) and phosphorus (P) management on different P fractions in soil. Residue retention treatments, viz., no-CR, 25% CR, 50% CR, and 75% CR in main plots and P fertilizer rates, i.e., no-P, 50% recommended dose of P (RDP), 100% RDP, 150% RDP, and 50% RDP + P solubilizing bacteria (PSB) and arbuscular mycorrhiza (AM) in sub-plots were laid out in split-plot design with three replications. The results of this study reveal that the surface retention of CR along with P fertilization has the potential to improve soil P fertility by increasing Olsen-P and organic P fraction. As compared to control, the aluminum bound P, iron bound P, calcium bound P, and reductant soluble P fractions in surface soil decreased from 30.3 to 27.3 mg kg−1, 44.7 to 31.3 mg kg−1, 265 to 227 mg kg−1, and 121 to 110 mg kg−1, respectively, with CR retention, while soluble and loosely bound P was increased from 6.11 to 7.64 mg kg−1 with CR retention. The beneficial effect of P fertilizer application on soil P fertility was further enhanced with the supplementation with PSB and AM.
The present study was undertaken to sequentially fractionate nickel in soils of divergent physico... more The present study was undertaken to sequentially fractionate nickel in soils of divergent physicochemical characteristics and evaluate the contribution of different fractions towards plant uptake. For this, fifteen bulk surface (0-15 cm) soil samples were collected from the cultivated fields of north-western Indo-Gangetic alluvial plains. A pot experiment was conducted with these soils to assess the contribution of soil Ni fractions to plant uptake using soybean as test crop. Results showed that residual Ni was the most dominant fraction in soil constituting 3.19 to 63.6% of total Ni. The water soluble plus exchangeable Ni accounted for only 0.70 to 4.04% of total soil Ni. Organically bound Ni varied from 1.60 to 6.85% of total Ni; these values are relatively lower as compared to those reported for temperate soils. Correlation studies showed that the free Fe2O3 and SOC were correlated with various fractions of Ni in soil. Water soluble plus exchangeable and organically bound are the...
Introduction. – Nickel (Ni) is the most recently discovered essen-tial nutrient element for plant... more Introduction. – Nickel (Ni) is the most recently discovered essen-tial nutrient element for plant (Brown et al., 1987). Subsequent to the discovery of its essentiality in the laboratory, Ni deficiency has now been observed in field situations in a few perennial species (Wood et al., 2004). Positive yield response of field crops to application of Ni (Brown et al., 1987) emphasizes the need of addition of Ni, particularly in deficient soils. On the other hand, accumulation of excessive amount of Ni in soils amended with municipal and industrial wastes can have a toxic effect on soil organisms and plants depending on its mobility and availability in soil (Alemayehu and Lennartz, 2010). With the addition of Ni to soil, the element can be distributed between solid and solution phases depending on Ni affinity characteristics of the differ-ent soil constituents. Its retention and decrease in mobility involves the phenomena of sorption, desorption, precipitation, ionic retention etc. Knowle...
Journal of environmental biology / Academy of Environmental Biology, India, 2014
The chemical equillibria between nickel (Ni) ion present in soil solution and solid phases govern... more The chemical equillibria between nickel (Ni) ion present in soil solution and solid phases govern the solubility vis-a-vis availability of Ni in soil. Therefore, stability of various Ni containing minerals in relation to pH was studied to identify the probable solid phases, which govern the solubility of Ni in some alluvial soils under intensive cultivation in and around Delhi. Free Ni2+ activity (pNi2+) as estimated by Baker soil test, ranged from 13.1 to 16.2. Highest free Ni2+ activity (pNi2+ = 13.1) was recorded in industrial effluent irrigated soil collected from Sonepat, Haryana. Free Ni2+ activity was 13.6 in soil collected from agricultural lands of Keshopur, receiving irrigation through sewage effluents. Soils receiving irrigation through tube well water showed relatively lower free Ni2+ activity (pNi2+ = 14.6 to 16.2). Ni-ferrite in equilibrium with Fe(OH)3 (amorphous) is likely to control the activity of Ni in two intensively Ni contaminated soil having pH around 8. Free ...
2 Productivity of resources on acid soils occupying one fourth of the total area in India is abys... more 2 Productivity of resources on acid soils occupying one fourth of the total area in India is abysmally low. Lime is applied to such soils with the primary objective of increasing the productivity of crops by enhancing the availability of native and applied plant nutrients. Greenhouse
Communications in Soil Science and Plant Analysis, 2021
ABSTRACT A field experiment was initiated in 2013 with maize–wheat cropping system to study the e... more ABSTRACT A field experiment was initiated in 2013 with maize–wheat cropping system to study the effect of crop residue (CR) and phosphorus (P) management on different P fractions in soil. Residue retention treatments, viz., no-CR, 25% CR, 50% CR, and 75% CR in main plots and P fertilizer rates, i.e., no-P, 50% recommended dose of P (RDP), 100% RDP, 150% RDP, and 50% RDP + P solubilizing bacteria (PSB) and arbuscular mycorrhiza (AM) in sub-plots were laid out in split-plot design with three replications. The results of this study reveal that the surface retention of CR along with P fertilization has the potential to improve soil P fertility by increasing Olsen-P and organic P fraction. As compared to control, the aluminum bound P, iron bound P, calcium bound P, and reductant soluble P fractions in surface soil decreased from 30.3 to 27.3 mg kg−1, 44.7 to 31.3 mg kg−1, 265 to 227 mg kg−1, and 121 to 110 mg kg−1, respectively, with CR retention, while soluble and loosely bound P was increased from 6.11 to 7.64 mg kg−1 with CR retention. The beneficial effect of P fertilizer application on soil P fertility was further enhanced with the supplementation with PSB and AM.
The present study was undertaken to sequentially fractionate nickel in soils of divergent physico... more The present study was undertaken to sequentially fractionate nickel in soils of divergent physicochemical characteristics and evaluate the contribution of different fractions towards plant uptake. For this, fifteen bulk surface (0-15 cm) soil samples were collected from the cultivated fields of north-western Indo-Gangetic alluvial plains. A pot experiment was conducted with these soils to assess the contribution of soil Ni fractions to plant uptake using soybean as test crop. Results showed that residual Ni was the most dominant fraction in soil constituting 3.19 to 63.6% of total Ni. The water soluble plus exchangeable Ni accounted for only 0.70 to 4.04% of total soil Ni. Organically bound Ni varied from 1.60 to 6.85% of total Ni; these values are relatively lower as compared to those reported for temperate soils. Correlation studies showed that the free Fe2O3 and SOC were correlated with various fractions of Ni in soil. Water soluble plus exchangeable and organically bound are the...
Introduction. – Nickel (Ni) is the most recently discovered essen-tial nutrient element for plant... more Introduction. – Nickel (Ni) is the most recently discovered essen-tial nutrient element for plant (Brown et al., 1987). Subsequent to the discovery of its essentiality in the laboratory, Ni deficiency has now been observed in field situations in a few perennial species (Wood et al., 2004). Positive yield response of field crops to application of Ni (Brown et al., 1987) emphasizes the need of addition of Ni, particularly in deficient soils. On the other hand, accumulation of excessive amount of Ni in soils amended with municipal and industrial wastes can have a toxic effect on soil organisms and plants depending on its mobility and availability in soil (Alemayehu and Lennartz, 2010). With the addition of Ni to soil, the element can be distributed between solid and solution phases depending on Ni affinity characteristics of the differ-ent soil constituents. Its retention and decrease in mobility involves the phenomena of sorption, desorption, precipitation, ionic retention etc. Knowle...
Journal of environmental biology / Academy of Environmental Biology, India, 2014
The chemical equillibria between nickel (Ni) ion present in soil solution and solid phases govern... more The chemical equillibria between nickel (Ni) ion present in soil solution and solid phases govern the solubility vis-a-vis availability of Ni in soil. Therefore, stability of various Ni containing minerals in relation to pH was studied to identify the probable solid phases, which govern the solubility of Ni in some alluvial soils under intensive cultivation in and around Delhi. Free Ni2+ activity (pNi2+) as estimated by Baker soil test, ranged from 13.1 to 16.2. Highest free Ni2+ activity (pNi2+ = 13.1) was recorded in industrial effluent irrigated soil collected from Sonepat, Haryana. Free Ni2+ activity was 13.6 in soil collected from agricultural lands of Keshopur, receiving irrigation through sewage effluents. Soils receiving irrigation through tube well water showed relatively lower free Ni2+ activity (pNi2+ = 14.6 to 16.2). Ni-ferrite in equilibrium with Fe(OH)3 (amorphous) is likely to control the activity of Ni in two intensively Ni contaminated soil having pH around 8. Free ...
2 Productivity of resources on acid soils occupying one fourth of the total area in India is abys... more 2 Productivity of resources on acid soils occupying one fourth of the total area in India is abysmally low. Lime is applied to such soils with the primary objective of increasing the productivity of crops by enhancing the availability of native and applied plant nutrients. Greenhouse
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