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opencc-by-4.0Nov 2024View details →

Dataset and Analysis Code for an Experiment on Phosphorus Fertilizers

Link to GitHub repository: <a href="https://github.com/jmalonso55/fosfatos">https://github.com/jmalonso55/fosfatos</a> Link to analysis code and results: <a href="https://github.com/jmalonso55/fosfatos/blob/main/An%C3%A1lise_fosfatos_g.md">https://github.com/jmalonso55/fosfatos/blob/main/An%C3%A1lise_fosfatos_g.md</a>   <h1>About</h1> This repository contains the data and R code for the statistical analysis and results visualization of the paper: Ramos, J. F. K., Alves, B. J. R., Alonso, J. M., Teixeira, P. C., & Benites, V. D. M. (2025). Characterization and agronomic efficiency of natural and recovered phosphates in tropical soil with corrected acidity. Rev. Bras. Ciênc. Solo, 49(spe1). Available in: <a href="https://dx.doi.org/10.36783/18069657rbcs20240099">https://dx.doi.org/10.36783/18069657rbcs20240099</a> The study is part of the Master’s Dissertation of Ramos, J.F.K. (Ramos, J.F.K. (2023). Caracterização química, mineralógica e eficiência agronômica de diferentes fosfatos [Dissertation]. Universidade Federal Rural do Rio de Janeiro, Seropédica, Brasil).  Available in: <a href="https://rima.ufrrj.br/jspui/handle/20.500.14407/18645">https://rima.ufrrj.br/jspui/handle/20.500.14407/18645</a>. <h2>Methodological aspects</h2> This study examined eleven phosphate fertilizer samples, encompassing Brazilian and imported products, as well as residue-recovered and soluble phosphates. The phosphate rocks of igneous origin were exclusively sourced from Brazil, specifically Catalão (Goiás) and Registro (São Paulo). Sedimentary sources included samples from Brazil (Arraias in Tocantins, Bonito in Mato Grosso do Sul, and Pratápolis in Minas Gerais) and from Morocco, Algeria, and Peru (Bayóvar). These phosphates are referred to as Catalão, Registro, Arraias, Bonito, Pratápolis, Morocco, Algeria, and Bayóvar, respectively. The experiment was carried out in a greenhouse, using plastic pots as experimental units, each containing 2 kg of a Ferralsol sample. The soil, initially identified as acidic (pH 4.68), was subjected to a correction process prior to the experiment. The study employed a completely randomized design with 12 treatments and four replicates, resulting in a total of 48 experimental units. The treatments included phosphate rocks (Catalão, Registro, Bonito, Pratápolis, Arraias, Morocco, Algeria, and Bayóvar), two animal-origin phosphates (Bonechar and ERCP), triple superphosphate (TSP) as a reference, and a control treatment without a phosphorus source. Each treatment received a single application of 320 mg P per pot (equivalent to 160 mg P per kg of soil), which was thoroughly incorporated into the soil before planting. The experiment spanned two successive cropping cycles, each lasting 45 days. At the end of each cycle, the aboveground parts of the plants were harvested, dried in a forced-air oven at 65°C until a constant weight was achieved, and their shoot dry mass (SDM) was recorded. The dried samples were finely ground in a Wiley mill and further processed in a ball mill for phosphorus content analysis. To evaluate the agronomic efficiency of the phosphate sources, the study calculated the Relative Agronomic Efficiency Index (RAE) and Phosphorus Efficiency (PE).

opencc-by-4.0Oct 2012View details →

Crop-specific global fertilizer application rates from "Closing yield gaps through nutrient and water management"

Crop-specific global maps of N, P2O5, and K2O fertilizer application rates circa the year 2000 from the following paper: Mueller, ND, JS Gerber, M Johnston, DK Ray, N Ramankutty, and JA Foley. 2012. Closing yield gaps through nutrient and water management. Nature 490: 254–257 Data are provided at five arc-minute resolution and are saved as netcdf files. Fertilizer application rates are estimated from reconciling various national and subnational data sources. See the Supplementary Information from the 2012 paper for a full description of data sources and methods. Data quality for each grid cell is described in a map layer. Files containing the text "totalcons" sum nutrient consumption across crops per grid cell, using crop harvested areas from Monfreda et al. 2008 Global Biogeochemical Cycles. For maize, wheat, and soybean N application rates, additional maps and csv files (containing the text "politboundaries") identify the political units around the world containing unique information. Crops and crop group categories are consistent with those utilized in Monfreda et al. 2008 Global Biogeochemical Cycles.

opencc-by-4.0Jun 2023View details →

The optimal period for oocyte retrieval after the administration of recombinant human chorionic gonadotropin in in vitro fertilization

This is the dataset of the study called "The optimal period for oocyte retrieval after the administration of recombinant human chorionic gonadotropin in in vitro fertilization". Abstract Background Our objective was to investigate the existence of an optimal period for oocyte retrieval in regards to the clinical pregnancy occurrence after the administration of recombinant human chorionic gonadotropin (rhCG) (Ovitrelle®). Methods We studied the digital records of 3362 middle eastern couples who underwent in vitro fertilization (IVF) treatment between 2019 and 2021. Results Through statistical testing, we found that there is a significant positive correlation between the oocyte retrieval period and the clinical pregnancy occurrence up to the 37th hour, where retrieval at the 37th hour was found to provide the most optimal outcome, especially in the case of gonadotropin-releasing hormone agonist (GnRHa) long protocol. Conclusions This cohort study recommends retrieval at hour 37 after ovulation triggering under the described conditions.

opencc-by-4.0Dec 2022View details →

Dataset for "Phosphorus fractionation of recycled fertilizers reveals inadequacy of the SMT protocol"

Raw dataset used in the manuscript "Phosphorus fractionation of recycled fertilizers reveals inadequacy of the SMT protocol"

opencc-by-4.0Jun 2023View details →

Emissions of nitrous oxide and methane after field application of liquid organic fertilizers and biochar

This dataset corresponds to the open access article "Emissions of nitrous oxide and methane after field application of liquid organic fertilizers and biochar" published in Agriculture, Ecosystems & Environment (<a href="https://doi.org/10.1016/j.agee.2023.108642">https://doi.org/10.1016/j.agee.2023.108642</a>) funded by the Swiss Federal Offices for the Environment (BAFU), Agriculture (BLW) and Energy (BFE).

opencc-by-4.0Jun 2023View details →

Dataset for Evaluation of a novel microfluidic chip-like device for purifying bovine frozen-thawed semen for in vitro fertilization

VetCountTM Harvester (MotilityCount ApS, Copenhagen, Denmark) is a novel sperm purification device. It consists of two chambers separated by a 10 μM microporous membrane. Untreated semen is applied in one chamber, sperm collection medium in the other. Motile sperm cells are selected by actively swimming through the membrane pores into the medium containing chamber. After 30 min incubation, the sperm collection medium can be aspirated and the purified sperm is ready for further use. In a first experiment we assessed sperm quality and recovery of frozen-thawed semen from six different bulls (n = 6) prior to and after purification with the VetCountTM Harvester or BoviPureTM gradient centrifugation, a commercial available standard technique. In a second approach, a competitive fertilization assay was performed. Ten straws per bull were pooled, split in two subsamples, and simultaneously purified either with the VetCountTM Harvester or BoviPureTM gradient centrifugation. Following purification, sperm cells from each treatment group were fluorescently labeled with either MitoTrackerTM Red FM or MitoTrackerTM Green FM. In vitro matured oocytes were inseminated with equal numbers of red and green labeled sperm. Eighteen hours after fertilization, fluorescence microscopy was used to determine the origin of the fertilizing spermatozoon.

openCC (other)Sep 2021View details →

Data for a leaf litter decomposition study and soil density fractionation analysis at a whole-watershed fertilization experiment in a temperate forest

To assess how elevated N deposition influences leaf litter decomposition dynamics and soil organic matter formation in a temperate deciduous forest, we coupled a reciprocal transplant leaf litter decomposition study with an analysis of the distribution of soil organic matter in mineral associated and particulate organic matter fractions at a long-term, whole-watershed, N fertilization experiment. We found that nearly 30 years of N additions slowed decay rates by about 11% for leaf litter decomposed in the fertilized watershed, regardless of the watershed from which the initial litter was collected. An apparent consequence of the altered rates of decomposition was that the soil in the fertilized watershed had about a 40% greater fraction of SOM in light particulate organic matter compared to the reference watershed, which was positively correlated with the bulk soil carbon to nitrogen ratio. Collectively, our results suggest that under conditions of N saturation, the physical transfer pathway of SOM formation is favored, which can have important implications for the future of the soil organic matter stock and nutrient cycling.

openCC (other)Mar 2023View details →

Seasonal N dynamics and fluxes of nitrogen in leachate and runoff from experimental rainfalls on fertilized and unfertilized lawns in Baltimore County, Maryland

The aim of this research was to examine the spatial and temporal variation in export control points of nitrogen on residential lawns (locations prone to mobilizing nitrogen during a rain event) and to examine if previously measured hydrobiogeochemical properties were predictive of N mobilization in lawns. This data set contains measurements of saturated infiltration rates, sorptivity, soil moisture, soil organic matter, bulk density, pH, soil nitrate, soil ammonium, N2O, N2 and CO2 fluxes from soil cores, nitrogen mineralization rates and fluxes of N in runoff and leachate from fertilized and unfertilized residential and institutional lawns. Study lawns were located at homes of people who agreed to volunteer their lawn for the study from a door knocking campaign. Four sampling houses were located in an exurban neighborhood in Baisman Run. Five sampling houses were located in a suburban neighborhood in Dead Run. Two sampling locations on institutional lawns were located at University of Maryland Baltimore County. At the exurban study houses and institutional lawns sites, we identified one hillslope to conduct sampling on. At the Dead Run houses we identified one hillslope on the front yard and one in the backyard as there were distinct locations that were not present in the exurban neighborhood. Locations within the yards for sampling were selected based on sampling conducted in October 2017. Locations were grouped into four categories based on have either high or low potential denitrification rates and high or low saturated infiltration rates (n=48). These locations were also distributed across yard types (exurban, suburban or institutional), fertilizer treatments, and hillslope location (top or bottom of hillslope). At each sampling location we ran a Cornell Sprinkle Infiltrometer to generate an experimental rainfall during which we collected runoff and leachate to quantity N flux. We also measure sorptivity and saturated infiltration rates. Volumetric water conten

openCC0Aug 2025View details →

Tree survey:Effects of Long Term Fertilization and Oak Canopy Cover on Plant Communities and Ecosystem Processes

In 1996 E142 was established in field D on top of the E004 macroplots. E004 was conducted in fields A, B, C and D by Dave Tilman. The purpose of E004 was to see what effect NH4NO3 addition has on large areas over a longer period of time with exposure to naturally-occurring levels of herbivory. The nutrient addition treatments in E004, E142 plots have been applied annually since 1982. These experiments, along with others at Cedar Creek, examine the community and ecosystem consequences of chronic nutrient loading.

openCC0Aug 2025View details →

Canopy litter biomass:Effects of Long Term Fertilization and Oak Canopy Cover on Plant Communities and Ecosystem Processes

openCC0Sep 2025View details →

Herbaceous Vegetation Survey:Effects of Long Term Fertilization and Oak Canopy Cover on Plant Communities and Ecosystem Processes

Effects of Nitrogen Fertilization on Litter and Soil Decomposition: Cumulative Microbial Respiration

The influence of inorganic nitrogen (N) inputs on decomposition is poorly understood. Some prior studies suggest that N may reduce the decomposition of substrates with high concentrations of lignin via inhibitory effects on the activity of lignin-degrading enzymes, although such inhibition has not always been demonstrated. The purpose of E145 was to study the effects of nitrogen (N) addition on decomposition of seven substrates ranging in initial lignin concentrations (from 7.4 - 25.6%) over five years in eight different grassland and forest sites in central Minnesota.

Effects of Nitrogen Fertilization on Litter and Soil Decomposition: Daily Microbial Respiration

Effects of Nitrogen Fertilization on Litter and Soil Decomposition: Microbial Biomass

Effects of Nitrogen Fertilization on Litter and Soil Decomposition: Fine Root Biomass and Chemistry

Effects of Nitrogen Fertilization on Litter and Soil Decomposition: Soil CN

Effects of Nitrogen Fertilization on Litter and Soil Decomposition: Soil pH

openCC0Jun 2025View details →

Long-term nitrogen fertilization inhibits carbon and nitrogen loss during late stage fungal necromass decomposition depending on necromass chemistry

Fungal necromass is increasingly recognized as a key component of in soil carbon (C) and nitrogen (N) cycling. However, how C and N loss from fungal necromass during decomposition are impacted by global change factors such as anthropogenic N addition and changes to soil C supply (e.g. via changing root exudation and rhizosphere priming) remains unclear and understudied relative to plant tissues. To address these gaps, we conducted a year-long decomposition experiment with four species of fungal necromass incubated across four forested sites in plots that had received inorganic N and/or labile C fertilization for decades in Minnesota, USA. We found that necromass chemistry was the primary driver of C and N loss from fungal necromass as well as response to fertilization. Specifically, N addition suppressed late-stage decomposition, but this effect was weaker in melanin-rich necromass, contrary to the hypothesis based on plant litter dynamics that N addition should suppress decomposition of more complex organic molecules. Labile C addition had no effect on either the early or late stages of necromass decomposition. Nitrogen release from necromass also varied among species, with N-poor necromass having lower N release after controlling for differences in mass loss via regression. The relatively minor effects of N fertilization on the proportion of initial necromass N released suggests that N demand by decomposers is the primary control on N loss during fungal necromass decomposition. Together, our results stress the importance of the afterlife effects of fungal chemical composition to forest soil C and N cycles. Further, they demonstrate that C and N release from this critical pool can be reduced by ongoing anthropogenic N addition.

openCustomJan 2020View details →

Experimental plots studies comparing the impact of fertilization and wrack addition on invertebrate abundance and plant cover in Atlantic and Gulf of Mexico salt marshes from April 2009 to September 2010

Understanding the relative strengths of top-down and bottom-up forces is an important key to predicting the structure of biological communities. The strength of these effects can be regulated in part by predator abundance and nutrient availability. In 2009, we hypothesized that the importance of these factors varies geographically between the southeastern Atlantic Coast and the Gulf Coast due to differences in tidal regime, and began to study this variation using a biogeographic, manipulative field experiment. Although our original purpose was to understand the structure of salt marsh arthropod food webs, BP's Deepwater Horizon spill in the Gulf Coast presented an opportunity to understand how stress from an oil spill might affect the variables that we were measuring. The fact that we had plots and transect sampling in place at multiple sites along the Gulf and East Coasts put us in a position to evaluate any impacts that might occur if oil hit some of the sites. The study was conducted at 11 sites across the Gulf Coast, from Texas to Florida, and 11 sites along the Atlantic Coast, from Florida to Maine. At each site, experimental plots were sampled and a 100m transect was sampled near the plots within 5m of the high marsh boundary. Sampling was conducted in May 2009, August 2009, and August 2010. In 2010, four extra sites were added to the existing experimental sites because of known oil contamination, and another site was added as an extra control. Only the transect sampling was conducted at these sites. This dataset contains all the data from experimental plots; experimental treatments of fertilizer addition, wrack addition, fertilizer & wrack addition, and no addition (control) were randomly applied to the plots. The plot treatments were maintained in August 2009 and May 2010.