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Showing 1 to 20 of 37 for “"soil phosphorus"”.
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Soil phosphorus fractionation and plant growth relationships
The measurement of phosphorus which is available to plants is a problem closely related to the forms and amounts of phosphorus present in soils. The fractionation of soil phosphorus, based on a series of extractions, is a procedure that has been utilized by many investigators. In this study, this …
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Characterization of the Aluminum-Bound Fraction of Soil Phosphorus
Made available in DSpace on 2014-12-10T17:12:38Z (GMT). No. of bitstreams: 1 6812204.pdf: 2605783 bytes, checksum: 2491ccdb4c81152a28d2240010867db1 (MD5) Previous issue date: 1968
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Studies of Soil Phosphorus Forms in Two Non-Calcareous Ontario Soils
Made available in DSpace on 2014-12-04T20:16:54Z (GMT). No. of bitstreams: 1 0019838.pdf: 2433626 bytes, checksum: 1f1154a63b749de19c0b534b1d4f2965 (MD5) Previous issue date: 1956
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Effects of Excessive Soil Phosphorus Accumulation on Loblolly Pine (Pinus taeda L.) Seedlings
… years of repeated poultry litter application, soils can accumulate extremely high extractable phosphorus (P) concentrations, sometimes over 1000 mg kg<sup>-1 </sup>of plant available P. Landowners report the conversion of these pastures to loblolly pine (<em>Pinus taeda</em> L.) plantations is …
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Effects of Excessive Soil Phosphorus on Pinus taeda L. Nutrient Uptake, Survival, and Growth
… evidence that old-fields with high available soil phosphorus (P) are difficult for the successful establishment of loblolly pine (Pinus taeda L.) plantations, with high mortality of seedlings and atypical tree form. These fields often acquired high P soil concentrations as a result of decades …
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SOIL PHOSPHORUS AND NITROGEN EXPORT AND RETENTION IN RAINFALL RUN-OFF FROM MANURED LANDSCAPES
… fields can be high in nitrogen (N) and phosphorus (P) due to excess nutrient application that is unused by crops. This can pose the risk of eutrophication of nearby surface water bodies receiving run-off. The objective of this study was to determine the effectiveness of precision …
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The Effects of Glomus Etunicatus and Soil Phosphorus on Phytophthora Root Rot of Soybean
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1982.
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The Distribution and Transformations of Soil Phosphorus on Differentiallytreated Plots at The Aledo Soil Experiment Field
Made available in DSpace on 2014-12-04T20:17:12Z (GMT). No. of bitstreams: 1 6202926.pdf: 4465386 bytes, checksum: f757da080396d08dec3110a1ad894170 (MD5) Previous issue date: 1962
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THE INFLUENCE OF PULSE CROPS ON SOIL PHOSPHORUS AVAILABILITY TO SUBSEQUENT WHEAT CROPS IN THE BROWN SOIL ZONE OF SASKATCHEWAN
… vs. cereal stubble is due to differences in soil phosphorus (P) availability. The influence of pulse crops on soil P availability and P uptake by subsequent wheat (Triticumaestivum L.) crops was assessed in a series of laboratory experiments and field studies conducted in the Brown soil zone …
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Strip-till and no-till soybean growth and distribution of roots and soil phosphorus, potassium, and water with broadcast and subsurface-band fertilization
… of application of the slowly-mobile nutrients phosphorus (P) and potassium (K) in conservation tillage systems were little mixing of the soil occurs, is an important management decision as placement can influence the availability to these nutrients to the crop. The objectives of this study were …
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An investigation of the duration of phosphorous fertilization effects on phosphorous and nitrogen cycling patterns of Pinus elliottii plantations in the southern Cape
The effects of phosphorus fertilization and its duration of impact on nutrient cycling patterns in Pinus elliottii plantations were investigated by examining soil phosphorus and nitrogen turnover and litterfall in a 8, 20 and 25 year old plantation age sequence. Each stand contained plots …
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Factors influencing phosphorus losses in agroecosystems dominated by tile drainage
Phosphorus is an important macronutrient for crop production but phosphorus surpluses may be conveyed from diffuse sources to streams via surface runoff and artificial subsurface (perforated plastic pipes called tiles) drainage affecting the quality of receiving aquatic ecosystems. However, …
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Population and community responses to anthropogenic environmental changes
… on native prairie grass communities. I show that soil phosphorus levels alter plant diversity by changing the degree to which mycorrhizae benefit plant species. Chapter two investigates plant extinctions in a fragmented landscape. Extinction rates of early-successional plant species on large …
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The fate of applied phosphorus on a piedmont soil and its effect on loblolly pine growth twenty years after application
A loblolly pine phosphorus fertilization trial was evaluated 20 years after establishment on a Tatum silt loam in the Virginia Piedmont. Triple superphosphate (TSP) was applied at 160 kg P/ha and ground rock phosphate (GRP) was applied at both 160 kg P/ha and 670 kg P/ha. Lime (4.48 T/ha) was …
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Plants in urban brownfields: modeling the driving factors of site conditions and of plant functional group occurrence in a dynamic environment
… temporal development of vegetation structure and soil of urban brownfields. The results showed that few soil parameters are clearly linked to site age, however, dividing the sites by their soil history, significant trends became visible. Vegetation height and density increased significantly over …
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THE RELATIONSHIP BETWEEN WOODLAND CARIBOU, SOIL CARBON CYCLING AND SOIL FERTILITY ON THE SLATE ISLANDS ARCHIPELAGO IN ONTARIO, CANADA
… caribou</em>) herbivory, vegetation, soil fertility, and soil carbon cycling on the Slate Islands Provincial Park in Ontario, Canada. Woodland caribou are threatened in Ontario, and the caribou population on the Slate Islands has declined steeply since 2015. Northern Michigan …
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The effect of soil nutrient availability on resource allocation in tropical tree species
… strategies for resource use and acquisition. Soil resources influence productivity of tropical forests and the distributions of tree species across edaphically heterogeneous landscapes. My dissertation evaluates functional variation among tropical trees in nutrient use, and the implications of …
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Distribution of phosphorus in sandy soils of coastal fynbos
The levels of soil phosphorus (both total and plant available) were investigated at the Pella intensive study site and were found to be low. Resin extractable phosphorus fluctuated seasonally, peaking at the soil surface during summer and declining to a minimum in the winter months. Rates of …
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Resource partitioning of soil organic phosphorus: investigations from a tropical mountain forest
… can specialize to exploit different forms of soil nitrogen. I hypothesized that a similar phenomena occurs in the tropics with soil phosphorus (P). I grew seedlings of arbuscular mycorrhizal (AM) Mollinedia darensi and Podocarpus olieofolius, ectomycorrhizal (EM) Oreomunnia mexicana, and …
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An assessment of factors controlling the biodegradation of benzene in the subsurface environment
… were to correlate benzene biodegradation with soil physical, chemical and biological properties, to determine if biodegradation could be predicted based on measured or observed soil properties, and to investigate the role of nutrients on benzene biodegradation in soil. Benzene disappearance …
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