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Mohammed Abdul Kader - One of the best experts on this subject based on the ideXlab platform.
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nitrogen mineralization in sub tropical paddy Soils in relation to Soil Mineralogy management ph carbon nitrogen and iron contents
European Journal of Soil Science, 2013Co-Authors: Mohammed Abdul Kader, Steven Sleutel, Shamim Ara Begum, Abu Zofar Md. Moslehuddin, S. De NeveAbstract:The nitrogen (N) requirement for paddy rice cultivated in Bangladesh amounts to approximately 80 kg N ha-1. Lack of knowledge on N mineralization from Soil organic matter leads farmers to meet this N requirement exclusively by costly mineral fertilizers, which have typically an efficiency of less than 40%. We assessed to what extent routinely analysed Soil properties (N and carbon (C), texture, pH, extractable iron (Fe), aluminium (Al) and manganese (Mn), Soil Mineralogy and length of the annual inundation period) are able to predict net aerobic and anaerobic N mineralization in paddy Soils. Both Soil N and C correlated positively with the aerobic but not with the anaerobic N mineralization rate. Instead, relative anaerobic N mineralization showed a significant negative correlation with Soil N content. We observed no significant influence of clay Mineralogy on Soil N mineralization. Aerobic but not anaerobic N mineralization increased with length of the annual inundation period while the proportion of the Soil N that was mineralized during 120 days decreased. The large clay content of fields that are inundated for 9–10 months annually explains the co-occurrence of large Soil N contents and relatively small N mineralization rates in these fields. However, variation in texture did not explain variation in N mineralization of Soils with inundation periods of 3–8 months. Instead, the anaerobic N mineralization correlated positively with Na pyrophosphate-extractable Fe and negatively with pH (both at P < 0.01). Thus, pH and Fe content, rather than Soil N content, clay Mineralogy or texture, explained the substantial variation in anaerobic N mineralization of paddy Soils in Bangladesh inundated for 3–8 months. It is not known if these relationships between net evolution of ammonium in Soil and pH and Fe content are causal or indirect. Elucidation of these mechanisms would greatly further our comprehension of the biochemistry of the young ‘floodplain Soils' with relatively low content of pedogenic oxides throughout southeast Asia.
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Nitrogen mineralization in sub‐tropical paddy Soils in relation to Soil Mineralogy, management, pH, carbon, nitrogen and iron contents
European Journal of Soil Science, 2013Co-Authors: Mohammed Abdul Kader, Steven Sleutel, Shamim Ara Begum, Abu Zofar Md. Moslehuddin, S. De NeveAbstract:The nitrogen (N) requirement for paddy rice cultivated in Bangladesh amounts to approximately 80 kg N ha-1. Lack of knowledge on N mineralization from Soil organic matter leads farmers to meet this N requirement exclusively by costly mineral fertilizers, which have typically an efficiency of less than 40%. We assessed to what extent routinely analysed Soil properties (N and carbon (C), texture, pH, extractable iron (Fe), aluminium (Al) and manganese (Mn), Soil Mineralogy and length of the annual inundation period) are able to predict net aerobic and anaerobic N mineralization in paddy Soils. Both Soil N and C correlated positively with the aerobic but not with the anaerobic N mineralization rate. Instead, relative anaerobic N mineralization showed a significant negative correlation with Soil N content. We observed no significant influence of clay Mineralogy on Soil N mineralization. Aerobic but not anaerobic N mineralization increased with length of the annual inundation period while the proportion of the Soil N that was mineralized during 120 days decreased. The large clay content of fields that are inundated for 9–10 months annually explains the co-occurrence of large Soil N contents and relatively small N mineralization rates in these fields. However, variation in texture did not explain variation in N mineralization of Soils with inundation periods of 3–8 months. Instead, the anaerobic N mineralization correlated positively with Na pyrophosphate-extractable Fe and negatively with pH (both at P < 0.01). Thus, pH and Fe content, rather than Soil N content, clay Mineralogy or texture, explained the substantial variation in anaerobic N mineralization of paddy Soils in Bangladesh inundated for 3–8 months. It is not known if these relationships between net evolution of ammonium in Soil and pH and Fe content are causal or indirect. Elucidation of these mechanisms would greatly further our comprehension of the biochemistry of the young ‘floodplain Soils' with relatively low content of pedogenic oxides throughout southeast Asia.
S. De Neve - One of the best experts on this subject based on the ideXlab platform.
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nitrogen mineralization in sub tropical paddy Soils in relation to Soil Mineralogy management ph carbon nitrogen and iron contents
European Journal of Soil Science, 2013Co-Authors: Mohammed Abdul Kader, Steven Sleutel, Shamim Ara Begum, Abu Zofar Md. Moslehuddin, S. De NeveAbstract:The nitrogen (N) requirement for paddy rice cultivated in Bangladesh amounts to approximately 80 kg N ha-1. Lack of knowledge on N mineralization from Soil organic matter leads farmers to meet this N requirement exclusively by costly mineral fertilizers, which have typically an efficiency of less than 40%. We assessed to what extent routinely analysed Soil properties (N and carbon (C), texture, pH, extractable iron (Fe), aluminium (Al) and manganese (Mn), Soil Mineralogy and length of the annual inundation period) are able to predict net aerobic and anaerobic N mineralization in paddy Soils. Both Soil N and C correlated positively with the aerobic but not with the anaerobic N mineralization rate. Instead, relative anaerobic N mineralization showed a significant negative correlation with Soil N content. We observed no significant influence of clay Mineralogy on Soil N mineralization. Aerobic but not anaerobic N mineralization increased with length of the annual inundation period while the proportion of the Soil N that was mineralized during 120 days decreased. The large clay content of fields that are inundated for 9–10 months annually explains the co-occurrence of large Soil N contents and relatively small N mineralization rates in these fields. However, variation in texture did not explain variation in N mineralization of Soils with inundation periods of 3–8 months. Instead, the anaerobic N mineralization correlated positively with Na pyrophosphate-extractable Fe and negatively with pH (both at P < 0.01). Thus, pH and Fe content, rather than Soil N content, clay Mineralogy or texture, explained the substantial variation in anaerobic N mineralization of paddy Soils in Bangladesh inundated for 3–8 months. It is not known if these relationships between net evolution of ammonium in Soil and pH and Fe content are causal or indirect. Elucidation of these mechanisms would greatly further our comprehension of the biochemistry of the young ‘floodplain Soils' with relatively low content of pedogenic oxides throughout southeast Asia.
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Nitrogen mineralization in sub‐tropical paddy Soils in relation to Soil Mineralogy, management, pH, carbon, nitrogen and iron contents
European Journal of Soil Science, 2013Co-Authors: Mohammed Abdul Kader, Steven Sleutel, Shamim Ara Begum, Abu Zofar Md. Moslehuddin, S. De NeveAbstract:The nitrogen (N) requirement for paddy rice cultivated in Bangladesh amounts to approximately 80 kg N ha-1. Lack of knowledge on N mineralization from Soil organic matter leads farmers to meet this N requirement exclusively by costly mineral fertilizers, which have typically an efficiency of less than 40%. We assessed to what extent routinely analysed Soil properties (N and carbon (C), texture, pH, extractable iron (Fe), aluminium (Al) and manganese (Mn), Soil Mineralogy and length of the annual inundation period) are able to predict net aerobic and anaerobic N mineralization in paddy Soils. Both Soil N and C correlated positively with the aerobic but not with the anaerobic N mineralization rate. Instead, relative anaerobic N mineralization showed a significant negative correlation with Soil N content. We observed no significant influence of clay Mineralogy on Soil N mineralization. Aerobic but not anaerobic N mineralization increased with length of the annual inundation period while the proportion of the Soil N that was mineralized during 120 days decreased. The large clay content of fields that are inundated for 9–10 months annually explains the co-occurrence of large Soil N contents and relatively small N mineralization rates in these fields. However, variation in texture did not explain variation in N mineralization of Soils with inundation periods of 3–8 months. Instead, the anaerobic N mineralization correlated positively with Na pyrophosphate-extractable Fe and negatively with pH (both at P < 0.01). Thus, pH and Fe content, rather than Soil N content, clay Mineralogy or texture, explained the substantial variation in anaerobic N mineralization of paddy Soils in Bangladesh inundated for 3–8 months. It is not known if these relationships between net evolution of ammonium in Soil and pH and Fe content are causal or indirect. Elucidation of these mechanisms would greatly further our comprehension of the biochemistry of the young ‘floodplain Soils' with relatively low content of pedogenic oxides throughout southeast Asia.
Shamim Ara Begum - One of the best experts on this subject based on the ideXlab platform.
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nitrogen mineralization in sub tropical paddy Soils in relation to Soil Mineralogy management ph carbon nitrogen and iron contents
European Journal of Soil Science, 2013Co-Authors: Mohammed Abdul Kader, Steven Sleutel, Shamim Ara Begum, Abu Zofar Md. Moslehuddin, S. De NeveAbstract:The nitrogen (N) requirement for paddy rice cultivated in Bangladesh amounts to approximately 80 kg N ha-1. Lack of knowledge on N mineralization from Soil organic matter leads farmers to meet this N requirement exclusively by costly mineral fertilizers, which have typically an efficiency of less than 40%. We assessed to what extent routinely analysed Soil properties (N and carbon (C), texture, pH, extractable iron (Fe), aluminium (Al) and manganese (Mn), Soil Mineralogy and length of the annual inundation period) are able to predict net aerobic and anaerobic N mineralization in paddy Soils. Both Soil N and C correlated positively with the aerobic but not with the anaerobic N mineralization rate. Instead, relative anaerobic N mineralization showed a significant negative correlation with Soil N content. We observed no significant influence of clay Mineralogy on Soil N mineralization. Aerobic but not anaerobic N mineralization increased with length of the annual inundation period while the proportion of the Soil N that was mineralized during 120 days decreased. The large clay content of fields that are inundated for 9–10 months annually explains the co-occurrence of large Soil N contents and relatively small N mineralization rates in these fields. However, variation in texture did not explain variation in N mineralization of Soils with inundation periods of 3–8 months. Instead, the anaerobic N mineralization correlated positively with Na pyrophosphate-extractable Fe and negatively with pH (both at P < 0.01). Thus, pH and Fe content, rather than Soil N content, clay Mineralogy or texture, explained the substantial variation in anaerobic N mineralization of paddy Soils in Bangladesh inundated for 3–8 months. It is not known if these relationships between net evolution of ammonium in Soil and pH and Fe content are causal or indirect. Elucidation of these mechanisms would greatly further our comprehension of the biochemistry of the young ‘floodplain Soils' with relatively low content of pedogenic oxides throughout southeast Asia.
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Nitrogen mineralization in sub‐tropical paddy Soils in relation to Soil Mineralogy, management, pH, carbon, nitrogen and iron contents
European Journal of Soil Science, 2013Co-Authors: Mohammed Abdul Kader, Steven Sleutel, Shamim Ara Begum, Abu Zofar Md. Moslehuddin, S. De NeveAbstract:The nitrogen (N) requirement for paddy rice cultivated in Bangladesh amounts to approximately 80 kg N ha-1. Lack of knowledge on N mineralization from Soil organic matter leads farmers to meet this N requirement exclusively by costly mineral fertilizers, which have typically an efficiency of less than 40%. We assessed to what extent routinely analysed Soil properties (N and carbon (C), texture, pH, extractable iron (Fe), aluminium (Al) and manganese (Mn), Soil Mineralogy and length of the annual inundation period) are able to predict net aerobic and anaerobic N mineralization in paddy Soils. Both Soil N and C correlated positively with the aerobic but not with the anaerobic N mineralization rate. Instead, relative anaerobic N mineralization showed a significant negative correlation with Soil N content. We observed no significant influence of clay Mineralogy on Soil N mineralization. Aerobic but not anaerobic N mineralization increased with length of the annual inundation period while the proportion of the Soil N that was mineralized during 120 days decreased. The large clay content of fields that are inundated for 9–10 months annually explains the co-occurrence of large Soil N contents and relatively small N mineralization rates in these fields. However, variation in texture did not explain variation in N mineralization of Soils with inundation periods of 3–8 months. Instead, the anaerobic N mineralization correlated positively with Na pyrophosphate-extractable Fe and negatively with pH (both at P < 0.01). Thus, pH and Fe content, rather than Soil N content, clay Mineralogy or texture, explained the substantial variation in anaerobic N mineralization of paddy Soils in Bangladesh inundated for 3–8 months. It is not known if these relationships between net evolution of ammonium in Soil and pH and Fe content are causal or indirect. Elucidation of these mechanisms would greatly further our comprehension of the biochemistry of the young ‘floodplain Soils' with relatively low content of pedogenic oxides throughout southeast Asia.
David M Hendricks - One of the best experts on this subject based on the ideXlab platform.
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mineral control of Soil organic carbon storage and turnover
Nature, 1997Co-Authors: M S Torn, Susan E Trumbore, Oliver A Chadwick, Peter M Vitousek, David M HendricksAbstract:A large source of uncertainty in present understanding of the global carbon cycle is the distribution and dynamics of the Soil organic carbon reservoir. Most of the organic carbon in Soils is degraded to inorganic forms slowly, on timescales from centuries to millennia1. Soil minerals are known to play a stabilizing role, but how spatial and temporal variation in Soil Mineralogy controls the quantity and turnover of long-residence-time organic carbon is not well known2. Here we use radiocarbon analyses to explore interactions between Soil Mineralogy and Soil organic carbon along two natural gradients—of Soil-age and of climate—in volcanic Soil environments. During the first ∼150,000 years of Soil development, the volcanic parent material weathered to metastable, non-crystalline minerals. Thereafter, the amount of non-crystalline minerals declined, and more stable crystalline minerals accumulated. Soil organic carbon content followed a similar trend, accumulating to a maximum after 150,000 years, and then decreasing by 50% over the next four million years. A positive relationship between non-crystalline minerals and organic carbon was also observed in Soils through the climate gradient, indicating that the accumulation and subsequent loss of organic matter were largely driven by changes in the millennial scale cycling of mineral-stabilized carbon, rather than by changes in the amount of fast-cycling organic matter or in net primary productivity. Soil Mineralogy is therefore important in determining the quantity of organic carbon stored in Soil, its turnover time, and atmosphere–ecosystem carbon fluxes during long-term Soil development; this conclusion should be generalizable at least to other humid environments.
Steven Sleutel - One of the best experts on this subject based on the ideXlab platform.
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nitrogen mineralization in sub tropical paddy Soils in relation to Soil Mineralogy management ph carbon nitrogen and iron contents
European Journal of Soil Science, 2013Co-Authors: Mohammed Abdul Kader, Steven Sleutel, Shamim Ara Begum, Abu Zofar Md. Moslehuddin, S. De NeveAbstract:The nitrogen (N) requirement for paddy rice cultivated in Bangladesh amounts to approximately 80 kg N ha-1. Lack of knowledge on N mineralization from Soil organic matter leads farmers to meet this N requirement exclusively by costly mineral fertilizers, which have typically an efficiency of less than 40%. We assessed to what extent routinely analysed Soil properties (N and carbon (C), texture, pH, extractable iron (Fe), aluminium (Al) and manganese (Mn), Soil Mineralogy and length of the annual inundation period) are able to predict net aerobic and anaerobic N mineralization in paddy Soils. Both Soil N and C correlated positively with the aerobic but not with the anaerobic N mineralization rate. Instead, relative anaerobic N mineralization showed a significant negative correlation with Soil N content. We observed no significant influence of clay Mineralogy on Soil N mineralization. Aerobic but not anaerobic N mineralization increased with length of the annual inundation period while the proportion of the Soil N that was mineralized during 120 days decreased. The large clay content of fields that are inundated for 9–10 months annually explains the co-occurrence of large Soil N contents and relatively small N mineralization rates in these fields. However, variation in texture did not explain variation in N mineralization of Soils with inundation periods of 3–8 months. Instead, the anaerobic N mineralization correlated positively with Na pyrophosphate-extractable Fe and negatively with pH (both at P < 0.01). Thus, pH and Fe content, rather than Soil N content, clay Mineralogy or texture, explained the substantial variation in anaerobic N mineralization of paddy Soils in Bangladesh inundated for 3–8 months. It is not known if these relationships between net evolution of ammonium in Soil and pH and Fe content are causal or indirect. Elucidation of these mechanisms would greatly further our comprehension of the biochemistry of the young ‘floodplain Soils' with relatively low content of pedogenic oxides throughout southeast Asia.
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Nitrogen mineralization in sub‐tropical paddy Soils in relation to Soil Mineralogy, management, pH, carbon, nitrogen and iron contents
European Journal of Soil Science, 2013Co-Authors: Mohammed Abdul Kader, Steven Sleutel, Shamim Ara Begum, Abu Zofar Md. Moslehuddin, S. De NeveAbstract:The nitrogen (N) requirement for paddy rice cultivated in Bangladesh amounts to approximately 80 kg N ha-1. Lack of knowledge on N mineralization from Soil organic matter leads farmers to meet this N requirement exclusively by costly mineral fertilizers, which have typically an efficiency of less than 40%. We assessed to what extent routinely analysed Soil properties (N and carbon (C), texture, pH, extractable iron (Fe), aluminium (Al) and manganese (Mn), Soil Mineralogy and length of the annual inundation period) are able to predict net aerobic and anaerobic N mineralization in paddy Soils. Both Soil N and C correlated positively with the aerobic but not with the anaerobic N mineralization rate. Instead, relative anaerobic N mineralization showed a significant negative correlation with Soil N content. We observed no significant influence of clay Mineralogy on Soil N mineralization. Aerobic but not anaerobic N mineralization increased with length of the annual inundation period while the proportion of the Soil N that was mineralized during 120 days decreased. The large clay content of fields that are inundated for 9–10 months annually explains the co-occurrence of large Soil N contents and relatively small N mineralization rates in these fields. However, variation in texture did not explain variation in N mineralization of Soils with inundation periods of 3–8 months. Instead, the anaerobic N mineralization correlated positively with Na pyrophosphate-extractable Fe and negatively with pH (both at P < 0.01). Thus, pH and Fe content, rather than Soil N content, clay Mineralogy or texture, explained the substantial variation in anaerobic N mineralization of paddy Soils in Bangladesh inundated for 3–8 months. It is not known if these relationships between net evolution of ammonium in Soil and pH and Fe content are causal or indirect. Elucidation of these mechanisms would greatly further our comprehension of the biochemistry of the young ‘floodplain Soils' with relatively low content of pedogenic oxides throughout southeast Asia.