Results 181 to 190 of about 9,728 (209)
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Transport of Inorganic Phosphorus in an Alfisol
Soil Science Society of America Journal, 1979Abstract Adsorption, desorption, and movement of phosphorus in an Alfisol soil were characterized by miscible‐displacement and batch‐type experiments. The influence of pore‐water velocity, aggregate size, and pretreatment of the soil with P was evaluated. A model which considers the interaction of P with soil as an equilibrium kinetic
O. A. de Camargo +2 more
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Acidification of a cultivated Alfisol in Venezuela
Communications in Soil Science and Plant Analysis, 1999Abstract A moderately acid sandy clay Alfisol was used to grow corn as a monoculture for twenty years using urea fertilization. Successive samplings were performed during crop growth over the last two years (1993 and 1994) in the upper two soil layers (0–20 cm and 20–40 cm) of the control plot where the addition of urea had been interrupted and in a ...
F. Millán +4 more
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Trace Elements in Manganese‐Iron Nodules from a Chinese Alfisol
Soil Science Society of America Journal, 2002The morphological properties, the mineralogy, and the chemical composition of Mn‐Fe nodules, collected from an Alfisol in Southern China (Wuhan), were studied by optical microscopy (OM), transmission electron microscopy (TEM), and scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), total and sequential dissolution chemical ...
LIU F +4 more
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Soil erosion on Alfisols in Western Nigeria
Geoderma, 1976Abstract The effect of slope, crop rotation and residue management on runoff and soil loss was investigated using field runoff plots of 25 m × 4 m on natural slopes of 1, 5, 10 and 15% on an Alfisol on the International Institute of Tropical Agriculture (IITA) research site near Ibadan, Nigeria.
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Phosphorus Sorption and Uptake from Sri Lankan Alfisols
Soil Science Society of America Journal, 1992Abstract Soil organic P as well as inorganic P quantity and capacity factors have been identified as P availability determinants in tropical soils. The effects of these factors on P uptake from 12 Sri Lankan Alfisols were determined. For the analysis, a P quantity variable ( Q
R. A. Morris +2 more
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Phosphorus Fractions and Availability in Sri Lankan Alfisols
Soil Science Society of America Journal, 1992Abstract Phosphorus is the second most limiting element in the Alfisols of tropical Asia and Africa. The relationships between P fractions in 12 Sri Lankan Alfisols and P taken up by plants in a greenhouse experiment and P removed by five chemical extractants were examined.
R. R. Sattell, R. A. Morris
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Alfisols and closely related soils in China
Chinese Geographical Science, 1992Alfisols are important soils in China. They occupy about 1.25 million km2, or about 13% of the land area. In the current Chinese system of soil classification, burozem, yellow-brown earths, Baijiang (Planosol) soils and parts of drab soils. They are mostly forested soils with an estimated 5–13 t/ha · yr of organic matter returned to the soils from ...
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Sustainable Management of Dryland Alfisols (Red Soils) in South India
Journal of Crop Improvement, 2009A community based cooperative research project was implemented on farmers' fields on some dryland Alfisols in Tamil Nadu, India, to demonstrate and validate improved dry-farming technologies, such as: 1) soil and water conservation and water harvesting; 2) cropping systems, including intercropping and double cropping; 3) recycling of processed ...
S Palaniappan +6 more
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1983
Publisher Summary Soil genesis in the Alfisol profile has achieved a stage of prominent expression with the development of the argillic horizon. If the Entisol order could be considered the stage of minimum organization, the Alfisol (and possibly the Ultisol profile) is a stage of maximum organization of the soil fabric.
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Publisher Summary Soil genesis in the Alfisol profile has achieved a stage of prominent expression with the development of the argillic horizon. If the Entisol order could be considered the stage of minimum organization, the Alfisol (and possibly the Ultisol profile) is a stage of maximum organization of the soil fabric.
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Land use options on a semi-arid Alfisol
American Journal of Alternative Agriculture, 1993AbstractFour land use options—annual cropping, agroforestry, agrihorticulture, and agrosilviculture—were tried on a Land Capability Class IVs Alfisol under rainfed conditions to find a farming system that would be profitable and sustainable. The agrihorticultural system required more cash input but gave a value/cost ratio of 2.16 compared with 1.95 ...
S.K. Das +5 more
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