Science topic
Nutrients - Science topic
A nutrient is a chemical that an organism needs to live and grow or a substance used in an organism's metabolism which must be taken in from its environment. They are used to build and repair tissues, regulate body processes and are converted to and used as energy.
Questions related to Nutrients
"After crushing corn straw and soaking it in wastewater containing only nitrogen and phosphorus, the straw is retrieved at specific time points and then soaked in pure water to assess the release of nutrients. By comparing the nitrogen and phosphorus concentrations with those in standard hydroponic nutrient solutions, the potential of the straw as a hydroponic fertilizer source can be evaluated. Is this experimental design feasible? Insights from experts, especially those familiar with straw utilization, would be greatly appreciated."
What are the economic and agronomic trade-offs associated with implementing precision nutrient management tools compared to conventional blanket fertilization, particularly in terms of input costs, nutrient recovery efficiency, and long-term soil fertility?
Hello Dear all,
Could you please give me some links to datasets containing images of soil ? my aim is analyzing the soil texture, moisture, nutrients, ... I want it for a deep learning approach.
Thank you very much
What is the impact of real-time nutrient monitoring and decision support systems on nutrient uptake efficiency, crop yield, and environmental sustainability in large-scale field crop production?
What is the critical limit of macro and micro-nutrient content in plants
I want studies about nutrients (nitrogen and phosphorus) and their effect on water quality and how do their ratios change according to water and sediment input.
What are the Impact of Using Nutrient Solution Cooling and Ultraviolet (UV) Disinfection on Plant Health and Yield in Hydroponic Systems?
What are the major challenges and opportunities associated with implementing precision nutrient management strategies in different agro-climatic regions, and how can policymakers and agricultural extension services support farmers in overcoming these barriers?
Hi!
We have been discussing which volume is optimal for culturing spheroids in 96 well plates. Usually when culturing monolayers or immune cells, I use 200 uL/well in order to have sufficient nutrients and cell waste capacity, and then it usualltý works well to change medium every 2nd to 3rd day. But now I have got the advise to culture spheroids in 100 uL, in order to make oxygen from the air more easily accessible. So I just wanted to check with you what experience you have regarding this?
Thanks in advance for any advise or suggestions!
Best,
Mona
How does the application of Jeevamrit in Zero Budget Natural Farming (ZBNF) influence soil microbial activity, nutrient availability, and overall soil fertility, and what are the long-term implications for sustainable agriculture?
How can I calculate the Nitrogen (N), Phosphorus (P), Potassium (K), sulfur (S), and Zinc (Zn) content in rice grain and Straw and their uptake in rice grain and straw? Moreover, could you please mention the unit of nutrient (N, P, K, S & Zn) uptake in grain and straw?
Wheat cultivation in semi-arid regions faces several challenges including low soil moisture, high temperatures, erratic rainfall and soil degradation. To ensure food security and sustainable production it is crucial to adopt climate smart agricultural practices that can improve yield, soil health and water efficiency.
I am particularly interested in:
- Drought resistant wheat varieties and their performance in different semi arid conditions.
- Soil moisture conservation techniques such as mulching, reduced tillage or biochar application.
- Water-efficient irrigation methods (e.g. drip irrigation, deficit irrigation strategies).
- Soil fertility management using organic amendments, biofertilizers or precision nutrient application.
- Agroforestry and intercropping practices that enhance resilience.
- Success stories or case studies from semi-arid wheat growing regions.
I would appreciate insights from researchers, agronomists and farmers who have worked in similar climates. Additionally, any references to recent studies, models or innovative technologies that enhance wheat yield under semi arid conditions would be highly valuable.
I am planning to purchase Escherichia coli ATCC 8739 from another university, and it will be placed in nutrient agar (NA) broth. Given an estimated travel time of 5-7 days, I am concerned about its viability during transit.
How long can E. coli ATCC 8739 survive in NA broth under these conditions? What are the best storage and transport methods to ensure its viability upon arrival? Any insights or experiences would be greatly appreciated.
How do changing climatic conditions, such as rising temperatures, altered monsoon patterns, and increasing atmospheric CO₂ concentrations, influence the carbon, water, and nutrient footprints of major crops in the Indo-Gangetic Plains, and what adaptation strategies could help mitigate their negative impacts on food security and ecosystem stability?
How do the carbon, water, and nutrient footprints of major crops such as rice, wheat, and sugarcane in the Indo-Gangetic Plains vary across different Agro-climatic zones, and what role do soil type, irrigation practices, and fertilizer use play in determining these footprints?
What are the comparative life-cycle assessments of carbon emissions, water consumption, and nutrient depletion for staple crops like rice and wheat in the Indo-Gangetic Plains, and how do different farming systems (e.g., conventional, organic, conservation agriculture) influence the sustainability of these cropping patterns?
How do different tillage practices impact on sugarcane biomass accumulation and yield under drip irrigation and what is the effect of trash retention on nutrient availability, soil health and overall crop productivity?
We often discuss how soil nutrient dynamics influenced by various factors ignornig climate or more specifically weather. Climate directly influence soil microbes, soil microbes directly influence soil nutrient dynamics. Therefore, we can't ignore climate in soil nutrient dynamics.
A recent work, a collaboration of Cornell University (USA) and RPCAU (India) had done an impressive work on it and later published in Heliyon. Take a look.
Seasonal variations in soil characteristics control microbial respiration and carbon use under tree plantations in the Middle Gangetic region
I am looking to estimate how much TN and TP uptaken by plants (kg/day) (mixed between floating and rooted plants) in a wetland system. Please suggest the process or method in detail i could use to estimate that. Help provided shall be much appreciated. Thank you
Let’s explore the growing impact of nutraceuticals on human health: their bioactive compounds are gaining recognition for their integrative roles in disease prevention, chronic condition management, and enhancing overall well-being.
A special issue of Nutrients MDPI (Nutrition and Public Health section) is open for manuscript submissions until July 20, 2025.
Guest editors Dr. Michele Antonelli and Dr. Davide Donelli encourage submissions that deepen our understanding of nutraceuticals’ efficacy, safety, and regulatory frameworks. Accepted papers will be published online with open access.
Let’s discuss how nutraceuticals are shaping the future of evidence-based medicine!
🧬🌿
I have extracted sediment nutrients using 2M KCl in a 1:5 sediment:KCl ratio. I am facing some difficulty with the preparation of standards for the preparation of standard curve towards the analysis of extractable ammonium/nitrite/nitrate. The standards prepared in KCl are showing non-insignificant absorbances with ammonium reagents (phenate method). How do I remove the color developed as a result of the reaction between KCl and phenate reagents?
Also, is the KCl-extraction technique valid for sediment extractable nitrite/nitrate? In these cases, how do I prepare the standards in KCl matrix? Please point me towards relevant protocols if available? Thank you so much.
Writing discussion need mechanism please
Can turbulent structure alter the nutrient distribution, leading to changes in phytoplankton growth? Could some phytoplankton experience changes in their vertical distribution due to turbulent transport?
Concerning lignin-degrading fungi in a substrate such as shredded corn-cobs, when will they start decomposing the lignin? Does it happen from the start or will it firstly take the readily available nutrients, such as sugars?
If data are given in mg/l or µg/l, is it possible to convert into mg/100g EP
A forest fire occured in Turkey. The total area was about 1700 ha. I am interested in sampling the site and also sampling control sites outside the burned area. My question is, would I represent the burn area if I sampled 4 plots about 6 ha in area. Within each plot, I would take 4 composite sample (each sample would be a mix of several soil cores). The plots would be the experimental unit. But they are very large. I wonder if this is too large? I would be comparing nutrient concentrations in the burn plots versus similar control plots (outside the burn). Fixed effect: burn treatment; Random effect: plot.
A renowned professor recently posed this question, and I don't have an answer. Could anyone provide insight? Why don't we use water as the extractant to directly measure available nutrients in soil for analysis, instead of relying on more complex chemical solutions?
Dear Colleagues,
I am working on histological observations of the gut of invertebrates.
My main research is on seasonal changes in the gut tissue of sea cucumbers.
This species ceases or decreases its feeding activity in summer and also decreases its feeding activity in winter.
In particular, the gut retracts or disappears in summer.
Gut retraction is recognised as a result of catabolising components in the body to conserve energy and to tolerate depleted stored nutrients.
Please advise if anyone else has researched this other reason for intestinal retraction in a professional manner.
Best regards.
Kai Tanaka
Pig slurry is rich in major and minor nutrients. Is there any way to improve
/ Enrich its manure quality to be used in agriculture organically ? please share your knowledge.
I want to conduct broiler feeding trial experiment. But I don't have Cro2, Tio2 and other expensive chemicals/reagents to determine nutrient digestibility parameters such gross energy, Metabolizable energy and others.
Can you share me any simple method of determining these parameters by taking samples from fecal samples?
Thank you so much!
One has to list down the details and understand that different feedstocks and the biogas digesters working on different feedstocks show different nutrient content value:
But when it comes to standardization of the same, one has to understand that the NPK values should be similar: From different feedstocks based Biogas digesters what would be the standard NPK - Nutrient contents of the digestate, and how consistent is it?
Join us in shaping the future of #ClinicalNutrition research. This is a
unique opportunity to showcase your latest research findings, in the
field of clinical #nutrition. Submit your article today, and let us
advance our understanding of nutrition-related issues and promote
positive outcomes for patient care and public health. #Endocrinology
#Diabetes
Edit by: Dr. Osuagwu L. Uchechukwu
Deadline: 25 November 2024
Access more:
https://www.mdpi.com/journal/nutrients/special_issues/YB51885771
The idea is to design an IoT system that is able to capture real-time conditions from an oil palm tree to ensure optimal growth.
Nutrients such as Sulfur, Nitrogen, Boron, Zinc, Copper and Iron.
It will be an honor, if anyone can suggest the standard methodology for analyzing nutrients(N,P,K) in soil microbial biomass
Hi
I am trying to revive Pseudomonas aeruginosa from frozen glycerol stock and also from cryobeads. But there was no bacterial growth. I used nutrient agar, tryptone soy agar to streak on. Also I added glycerol stock to nutrient broth and tryptone soy broth but there was no growth.
I would appreciate your guidance.
Thank you
Nutrient recovery is becoming the order of the day as purchasing NPK has become more costly lately. In the advent of food security issues, one is tempted to get cheaper means to produce nutrients for farming activities.
In other words, is it simply the nutrient supply that makes soil plants much less effective when they are closer together or does it have to do with the roots interfering with each other. If it's the former, would increasing nutrient supply allow for soil based plants to be planted closer together. Thanks.
From clinical sample we are trying to identify Staphylococcus aureus by using nutrient agar. Based on the appearance of colonies on the nutrient agar plate please describe the characteristics that would suggest the presence of Staphylococcus aureus. Include details about colony shape, color, and Gram stain results.
Hello everyone,
I'm working on a project to develop an automated soil fertility calculator. We're currently stuck on the liming phase. We understand the entire procedure for calculating lime input using the bases method. However, we'd like to include the nutrient release per material, or at least understand the formula that should be used.
We've reviewed various publications that discuss the release rate of liming materials. We recognize that this concept is more related to the capacity of each product to suppress soil pH over time. We also understand that factors like humidity, particle size distribution (granulometric efficiency), and neutralization value play the most crucial roles. Despite this information, it's unclear to us what technique we should use to determine the amount of nutrients released from lime in the short and long term.
I hope this explanation is clear. Please feel free to ask any questions you may have.
Critical soil levels are determined using indicator plants and extractive solutions that mimic the nutrient extraction process from these plants.
Can indicator plants reliably demonstrate the nutrient extraction capabilities of other species?
Can an extraction solution accurately replicate the quantity of nutrients extracted from any species?
What is the difference between a critical level and a reference level, in relation to soil chemistry and the overall nutrient content in leaf tissue?
What characteristics should a tool have to better understand soil chemistry and nutrient availability for key agricultural plant species?
I am a researcher of Soil science department. 5 months ago I had planted wheat for my research. The research design was split plot design. it has 3 replications, each replication has 2 main plot treatment: Farm yard manure @20t/ha and Biochar @ 20t/ha, and each main plot had 5 treatments:
T1: no N fertilizer,
T2: 100% recommended dose of Prilled urea
T3: 50% recommended dose of Prilled urea
T4: 100% recommended dose of Neem coated urea
T5: 50% recommended dose of Neem Coated Urea
after harvesting of wheat crops, there were wheat crop stubbles left 20 cm above the ground level. The wheat crop residues were not removed and incorporated in the soil after harvesting in April 12. Now in April 20 I had planted Mungbean in the same research trial, and no external fertilizers are used and is grown under residual nutrients of previous planting. The temperature here is 42 degree celcius during sowing of mungbean. I had been thinking to use mungbean as a green manure to increase soil fertility and ground cover in irrigated condition.
How can we evaluate changes/impacts of activities within one research period?
The question aims to figure out the best nutrient needs and application techniques for growing mushrooms in polybags using substrates other than traditional straw. In order to properly integrate these nutrients into the growing system, it explores different application methods, ascertains the optimal dosages or concentrations, and pinpoints the precise sorts of nutrients required for mushroom growth. The goal is to maximize mushroom yields and quality by taking care of these factors and making use of substitute substrates and container systems like polybags.
There are many methods are available to predict soil available nutrients such as soil testing, plant testing, nutrient deficiency / toxicity symptoms on plant foliage etc. and recommending fertilizers without assessing the existing natural minerals resources. In this connection, study on the identification and quantification soil mineral resources, release pattern and prevailing environment may be highly useful not only to recommend nutrients and forms of nutrients suitable for particular crop besides saving of cost on unwanted application of fertilizers.
The execution of pedological and soil mineral resource based fertilizer application may also pave way for organic farming to great extend. Soil Scientist, pedologist and geomorphologist may start new dimension of discussion on this topic.
I'm isolating bacterial from soil on Nutrient Agar media but after 4-5 days I see fungal growth start in the plates. I read about use of Nystatin to prevent fungal growth. How much quantity or concentration of Nystatin should I use for 250 ml of culture media.
Thanks in advance for answering this question. It would be great if you could suggest any paper supporting this answer.
I found the following key information regarding the antennal gland in decapods.
The antennal glands (AnGs), which is also known as the green or maxillary gland, are located at the base of the antenna and connected to the external environment by the nephropore, consisting of a complex coelomosac and labyrinth (Holdich, 2002, Freire et al., 2008, Tsai and Lin, 2014). In decapod, AnGs are ion-regulating and excretory organs that are considered as important as gills in osmoregulation (Maddrell and O’Donnell, 1992, Charmantier et al., 2009). The AnGs play key physiological roles similar to the kidneys of vertebrates and the Malpighian tubules of insects due to their similar structure, which participates in filtering hemolymph to form urine and thereby maintaining the volume of the extracellular fluid and regulating its concentration of ions and nutrients (Lh, 1983; Lin et al., 2000; Freire et al., 2008). In addition to the control of hemolymph volume, it is also involved in the hyporegulation of hemolymph magnesium and sulfate, excretion of organic compounds, and reabsorption of the fluid, sugars, and amino acids from the primary urine filtrate (Holliday and Miller, 1984; Henry and Wheatly, 1992; Behnke et al., 1998). The AnGs are also the major site for the secretion of ecdysteroids from the hemolymph (Mykles, 2011). Recently, research has shown that AnGs are also a possible route of infection for viruses and parasites and may be involved in certain immune responses (Thrupp et al., 2013; Ryazanova et al., 2015; De Gryse et al., 2020; Liu et al., 2021). https://doi.org/10.1016/j.cbd.2023.101087
I want to simulate soil erosion, water quality and Soil nutrients under various land use scenario. Please can ArcSWAT or QSWAT be used for this analysis? I would also welcome a suggested software that can perform this function.
Is this technology reliable? How can they provide this nutrient status based on a infra red spectrometer?
Thanks
Hi everyone
I am currently investigating the effect of iron deficiency on neuronal cells (SHYSY5Y to be exact). For this, I need to create an environment of iron-depletion in-vitro. While past publications have used iron chelators in media, this involves considerable quality control. This is why I am choosing to mimic an iron-deficient environment through serum starvation.
I am currently struggling to find publications outlining a validated method of serum starvation to achieve this, which would be of great help, as a trial- and error method in the lab is time consuming. Another concern is that other essential nutrients would also be depleted with serum starvation, that may affect any findings and therefore impact the validity of results. I am also interested in any iron-depleted media out there that I could potentially use?
Would greatly appreciate any advice, links to publications or methods I could follow.
The standard of different nutrients/metals has a pH between 2 to 4 and when we prepared the sample, sample had a pH between 5 to 7. When we ensure the pH of the sample is within the range of pH of standard use. We obtained different results as compared to non-adjusted results.
Can someone provide the literature regarding this issue? I have already studied the effect of pH but not relevant to the standard used. Thanks in advance
discussion and results on the effect of temperature on bacterial growth at 37,65 and 100 degrees Celsius using nutrient agar plate
- Summarize the concept of organic nutrient resources and their fortification in agriculture.
- Illustrate the methods used to enhance soil fertility organically, emphasizing the importance of sustainable nutrient management.
Hello intellect.
I am working with an algal consortium to treat wastewater derived from cattle (CRWW). Different dilutions of raw CFWW (FCWW/dH2O; v/v) were used for algal cultivation. As a control, the raw CFWW was taken at the same dilution without any algal inoculation. After batch cultivation for 10–12 days, I looked at the nutrient remediation profile and found that the control group—which did not have any algal cells—performed better than the phyco-remediation group because of its own microbial consortium.
Before treatment, the raw CFWW is extremely turbid, brownish in colour, and smells strongly. However, after batch completion, the colour of the phytoremediation case lightened relative to the control case, and both cases exhibited no smell. There is a range of 1200 to 1600 mg/L for the maximum soluble COD.
I need advice.
1. When dealing with raw, unsterile wastewater, is it a good idea to compare phyco-mediation with control (having microbes)?
2. Can I add a sterilization step before beginning phyco-remediation (such as using chemicals as our real-time treatment goal)?
3. Can we add any steps to the flocculation or coagulation process before the algal batch culture?
4. Alternatively, to improve microalgal doubling time and nutrient remediation as well, we must add some nutrients in the form of N/P.
5. Is there a competition between the algal cell and the natural microbiota of CFWW in the flask inoculated with algae, and if so, why does nutrient remediation become sluggish?
*****The microalgae consortium that was used as an inoculum was a CFWW-adopted culture that was in its active phase when it was added to the flask that had raw CFWW in it.
How N fertilizer contributes to the crop and post harvest soil. Need an explanation with a suitable formula
- Compare the restrictions on nutrient use in organic farming with conventional agriculture.
- Discuss the impact of these restrictions on crop yields, and evaluate strategies employed by organic farmers to overcome nutrient limitations.