Results 61 to 70 of about 641,085 (189)
Revista Brasileira de Ciência do Solo, 2019 Use of organic fertilizers in integrated crop-livestock (iCL) systems may affect soil phosphorus fractions. This study aimed to determine phosphorus fractions in the soil under the iCL system after six years of application of organic or mineral ...
Amanda Zolet Rigo +6 more
doaj +1 more source
Recommendations for regulating phosphorus from livestock operations in Manitoba
, 2019 The primary concern surrounding phosphorus in Manitoba is the eutrophication of waterways and water bodies and in particular, Lake Winnipeg. While there are many sources of phosphorus - natural and man-made, a particular concern exists related to the ...
The Manitoba Phosphorus Expert Committee
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Effect of long-term phosphorus fertilization on soil phosphorus fractions .
Spanish Journal of Soil Science, 2014 A limitation to crop production in the southeast of the Buenos Aires province (Argentina) is the low phosphorus (P) availability. P fertilization is required for high yields. The objective of this work was to quantify the forms of soil P as affected by different P fertilization strategies after 8 years under wheat.
Ester Crisitna Zamuner +2 more
openaire +1 more source
, 2011 Little is known about the effects of air-drying and freezing on the transformation of phosphorus (P) fractions in soils. It is important that the way in which soils respond to such perturbations is better understood as there are implications for both P ...
Sun, J. N. +7 more
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, 2010 A long-term (21-year) field experiment was performed to study the responses of soil inorganic P fractions and P availability to annual fertilizer P application in a calcareous soil on the Loess Plateau of China.
Mu Han-Feng +3 more
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Phosphorus resources and fractions in peat-muck soils
Environmental Protection and Natural Resources, 2018 The goal of the research was to determine the resources and speciation (forms of occurrence) of phosphorus in organic soils of drained fens of the Wysoczyzna Siedlecka. Two profiles of muck soils were generated from different peats.
Becher Marcin +3 more
doaj +1 more source
Frontiers in Marine Science, 2018 Phosphorus (P) is a key factor forcing eutrophication in limnic and marine systems, and all monitoring programs for water quality accordingly include P determinations. However, traditional monitoring does not allow an analysis of the different components
Lisa Felgentreu +4 more
doaj +1 more source
Phosphorus critical levels and availability in lowland soils cultivated with flooded rice
Scientia Agricola, 2002 Lowland soils present a great potential for the flooded rice crop. This work aimed to estimate critical levels of P in waterlogged soils cultivated with rice using Mehlich 1 and anion exchange resin as soil-P extractors, compare the performance of these ...
Mariano Isabela Orlando dos Santos +3 more
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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 [PDF]
, 1992 Includes bibliographical references.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,
Wienand, Karen Tania
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Organic Phosphorus Fractions in Relation to Soil Aggregate Fractions of Black Soil
AgronomyKnowledge of long-term phosphorus behavior is essential to improve soil structure, nutrient supply potential, and the sustainability of cropping systems.
Stanko Milić +7 more
doaj +1 more source