Results 31 to 40 of about 47,096,289 (234)

Spectral analysis of total phosphorus in soils based on its diagnostic reflectance spectra

open access: yesResults in Chemistry, 2021
Visible and near infrared spectroscopy (VNIR) has been successfully used to determine many soil parameters rapidly. However, total phosphorous (P) cannot be well quantified by VNIR, mainly because its absorption spectrum or reflectance spectrum was too ...
Pingping Fan   +3 more
doaj   +1 more source

Tillage effects on phosphorus fractions of freshwater wetlands

open access: yes浙江大学学报. 农业与生命科学版, 2008
In order to discuss the influence of reclamation on wetland soil P, a modified Hedley P fractionation method was employed to compare the variations of P fractions between wetland soil, farmland and abandoned farmland in Sanjiang Plain, China.
QIN Sheng-jin   +3 more
doaj   +1 more source

Effect of long-term phosphorus fertilization on soil phosphorus fractions Efecto a largo plazo de la fertilización fosfatada en las fracciones de fósforo del suelo Efeito a longo prazo da adubação fosfatada nas frações de fósforo do solo [PDF]

open access: yesSpanish Journal of Soil Science, 2012
<p style="text-align: justify;">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.
Ester Crisitna Zamuner   +2 more
doaj   +1 more source

Impacts of timber harvest intensity and P fertilizer application on soil P fractions

open access: yesForest Ecology and Management, 2019
Research has shown significant effects of timber harvest residue management on soil organic carbon (SOC), but less impact has been observed on the available P pool.
J. H. Rocha   +7 more
semanticscholar   +1 more source

Mobility of different forms of phosphorus in sandy soils

open access: yes浙江大学学报. 农业与生命科学版, 2010
Predication of the long-term leaching of phosphorus (P) in the soil requires information of soil characteristics and behavior of P forms. This study assessed the mobility of different P forms in sandy soils that have been intensively loaded with P.
ZHANG Hui-min, ZHANG Ming-kui
doaj   +1 more source

Changes in the Soil Phosphorus Supply with Rice Straw Return in Cold Region

open access: yesAgronomy, 2023
Most phosphorus (P) in soil exists in nonlabile forms, leading to poor soil P supply capacity and limiting crop growth. This study evaluated the effect of 10 years of rice straw return on rice yield, soil P budget, P fractions, and phosphatase activity ...
Shuangshuang Yan   +8 more
doaj   +1 more source

Impact of Phosphorous Fertilization on Rape and Common Vetch Intercropped Fodder and Soil Phosphorus Dynamics in North China

open access: yesAgriculture, 2022
This study explores the effect of phosphorus (P) fractions, under P addition or not, based on a common vetch-rape model cropping system in alkaline soil. A two year field experiment was conducted at Tuzuo Banner modern agricultural Park in Inner Mongolia,
Jiahui Qu   +7 more
doaj   +1 more source

Limit problems for a Fractional p-Laplacian as $${p\to\infty}$$ p → ∞ [PDF]

open access: yesNonlinear Differential Equations and Applications NoDEA, 2016
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Ferreira, Raúl, Pérez-Llanos, Mayte
openaire   +2 more sources

Soil phosphorus fractions and their relation to leaf litterfall in a central Amazonian terra firme rainforest [PDF]

open access: yesActa Amazonica, 2022
Phosphorus (P) cycling is an important yet poorly studied aspect of the macronutrient balance in tropical rainforest ecosystems. As soil P occurs in different organic and inorganic forms (fractions) with varying degrees of lability, we hypothesized that ...
Emily Darc Andrade dos SANTOS   +4 more
doaj   +1 more source

The Interaction between P Fertilizer and Vermicompost on the Availability, Fractions of P and (Zea Mays L.) Growth Indices in a Calcareous Soil

open access: yesعلوم آب و خاک, 2020
In order to increase the available Phosphorous (P), chemical fertilizers are applied; however, P chemical fertilizers are transformed into low available forms over time.
F. Shahbazi   +2 more
doaj  

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