Questions related to Plant-Soil Interactions
Hello respected Seniors and colleagues working for a nutritious society,
An idea to find correlations between the localized micro, macro nutrient deficient soils when grown with crops and consumed locally should result in the similar type of mal-nourishment in the populace of the same locality. the incidents of disease and syndromes should be higher,
i wish to study this correlation. and to do that local data regarding the amount or %age people suffering from particular syndromes would be needed, a generalized soil fertility map for the entirety of the country can be found from various researches being done for the characterization and soil surveys of India.
P.S.- Correlation doesn't mean causation, but i believe wholesome food for everyone might be a little easier by studying these characteristics in the human and livestock's.
Please suggest your valuable inputs on whether this study will lead to something or not?
How, by measuring the electrical conductivity of the Drainage from the hydroponic growth medium such as cocopeat or perlite, find out how much nutrient solution is needed for irrigation to keep the moisture in the growth medium constant?
I have to implement Green Ampt Infiltration equation for daily time step with regional scale over different Land use/Land cover conditions. The Green Ampt parameters are estimated using soil properties, how the equation could be improved for different LULC conditions and what could be the effect of varying spatial and temporal resolution in model performance.
The aim of this forum is to share experience on crop modelling matters to seek help and assist researchers on the following aspects:
1) calibration approaches and issues
2) validation approaches and issues
3) usage of weather
4) usage of soil characteristics
5) algorithms interacting with weather, soil, crop, crop management
6) algorithms on plant mechanisms (example: phenology, source and sink balances etc.)
7) field to regional level modelling
8) crop and climate interaction modelling
9) crop model structure and parameters
10) limitations and improvements
11) new generation models
12) linking eco-physiological model and genetic (and genomic) models/research
13) anything related to crop modelling research
Please follow this discussion so that you can post your queries, advice and guide others and keep yourself updated on crop modelling research and look for collaborations.
As soil quality represent it's "fitness to use" or "capacity of soil to function to sustain productivity maintaining environmental quality and improved health".
What are the basic components which must be included while developing the soil quality index?
Minimum set of data required for SQI ?
Is it necessary to rotate all the components ?
Assuming other factors non-limiting crop yield, focusing on soil physics, and looking for indicators of soil physical quality: can the degree of compaction (Bulk density/maximum or reference Proctor bulk density) be a universal indicator for crop yield?
Glycine max seeds are normally inoculated with Bradyrhizobium japonicum before planting, but if I am attempting to see differences in nodulation between treatments with addition of a potentially toxic material I would rather inoculate the soil in pot experiments, because the bacterium is not native in my area and thus would be unlikely to find. The point is to draw a parallel with areas that has previous history of G. max growth and would not necessarily need seed inoculation because B. japonicum would already be present in the soil. Or would it be irrelevant to think this way, because a lot of farmers inoculates every growth season?
Hello everybody, can you help me to understand the difference between correspondence analysis and canonical correspondence analysis using past application and for which type of data can i use them? Thanks in advance.
I want to set up a pot experiment of which phytoremediation techniques should be used as to remove metals. So, which plant I should use or who are the most effective accumulators.
Can any one explain me that addition of nanoparticles enhances the growth of plant and produces more yield. If so, can anyone list me the nanoparticles i can use
Plant is Tomato and Aubergines
I am Krishna, working on a project to set up a soil test lab for internal (organisation) use. We are looking for options to buy equipment for testing soil nutrients macro nutrients and micro nutrients for fertilizer recommendations including CEC, pH. We believe quantitative analysis is optimal for operations as we operate more than 5000 acres of cranberry and blueberry farm.
Kindly suggest the set of equipment which can be used for our purposes? Also, the name(s) of manufactures if you know.
I'm planning a soil amendment experiment using a few different types of sludge. How do I decide on the application rate to be used in the experiment (if I am going to select only one application rate for each type of sludge)? From the papers I have read so far, no justification is given as to why a certain ratio (e.g. 1:1) is used.
Many farmer's are applying the fertilizers through foliar, and they are continuously asking what is the use efficiency of this Fertilizer through foliar application, and how to increase the efficiency, please suggest.
I need to get the details of the electro-ultrafiltration method of potassium determination and its efficiency as compared to the other most commonly used methods.
I plan to try plant growth test with lubricant contaminated soil.
The method i thought is (1)Put soil in flower pot, (2)plant seedling, (3)Treat three types lubricant oil that mineral type, non-mineral type(vegetable oil) and waste type(reused oil) to three flower pot.
As a result, what I am wondering is lubricant oil's effect on plant growth.
but i don't have research site and funding so i plan inside experiment and experiment scale is pilot study scale.
this method incomplete so i want to improve it with your advice.
I need discussion with other researchers and need comments too.
I discovered 25 years ago, that if you test the top 5 cm of soil from around seedlings of a native plant population, you can produce a "Reference Threshold" for the soil nutrient in PPM and the organic matter percentage needs for that species. Then, when you have a seed sowing project for that species, you do another soil soil test in the top 5 cm, and amend whatever nutrients and organic matter levels that are below the thresholds and add those to the seeds when sown. Working on producing those Reference Thresholds for 2,000 native species in the Western USA, and am asking if anyone has started this work anywhere else on the planet, when doing ecological restoration, especially of arid ecosystems? See http://www.ecoseeds.com/seed-thresholds.html for species and protocols.
I would like to know how soil amendments (e.g., lime, wood ash, EDDS, EDTA) improve tree physiological parameters such as CAT, MDA, SOD when plants grow in contaminated soil. How these parameters help to improve metals accumulation in plants? How soil amendments improve metals accumulation in plants?
Thanks for your help.
We are working on wastewater treatment in villages of Maharashtra, India. We are exploring if kitchen garden is safe option in the places where soak pits don't function. Waste water from kitchen and bathroom contain soap, detergent powder, shampoo, hair dyes etc. If this water is given to the kitchen garden, do roots absorb these materials? Do these harmful materials enter food chain? If no, which plants should be considered for the kitchen garden?
What is the role of lectins in the soil? In our studies we found in the soil proteins that have agglutinating activity. Their evaluation showed that they are lectins. Like soil enzymes, they may have long time to remain active. It is known that lectins in plants and other living organisms play a great role in their vital activity. The question arises, what is their role in the soil?
I will be grateful for your opinion
Agroforestry boost the health of soil, induce water holding capacity (WHC), maintaining soil aggregates, improving soil organic (SOM), facilitating multilayer farming, economically viable and environmentally desirable still research and development is not doing at pace and people not taking much more interest in this field. What are the reasons behind it? Please share your valuable view and research findings.
Thanks and regards, Dr Shankhwar
is there a reference number put to be used to say the obtained number of AMF spore per gram is low, medium or high? say for instance is 18 spore per gram of dry soil large or medium or small?
I have to add water in one kilogram soil to make it about 80% field capacity level. What is the best way to measure the amount of water required to attain 80% field capacity in one kilogram soil?
We are trying to ascertain germination characteristics for an invasive plant (in South Africa): Cistus ladanifer and one suit of experiments will involve heat treatment to mimic a fire, but we cannot find reliable information on the range of temperatures with increasing soil depth (as a basis to guide our experimental temperatures for the heat trial).
Thanks in advance for any help on this!
Heavy use of copper based fungicides is a big source of soil copper contents. Uptake by plant is generally linked with pH and presence or absence of some micronutrients, such as Zinc, molybdenum. Some researchers suggest use of lime for tuning copper uptake. Question arises, what should be minimum and maximum copper level? When treatment, may be in the form of other micro nutrients, lime or other form of alkalinity is required to discourage its unwanted uptake?
In using BLA, what’s likely to be the minimum sample size to used for the result to be acceptable and Reliable?
I have been studying soil and leaf tissue nutrients response for a berry crop and would like to use similar approach (BLA) to determine the optimum ranges for some nutrients.
I need to work with disinfected soil, does putting this soil in an autoclave make it lose these characteristics?
Is there any other techniques to obtain disinfected soil, without any microorganism?
Would like to know how much N is mineralized in tropical soils annually ? Approximately 0.18 % total nitrogen, Organic carbon - 2.2 %. Average temperature 22-30 C.
I just read about your project that I find amazing and absolutely interesting.
Do you have any plans for adding Chl a Fluorescence as a complementary technique for investigating heavy metal induced stress in plants/trees ?
I would like to identify/detect what organic substrates (e.g. leaf litter remnants, frass, death canopy foragers, dissolved OC, etc.) are being used by soil microorganisms in the process of soil heterotrophic respiration by comparing the isotopic signature of the soil gas flux (i.e. collected in a soil flux chamber) and that of a potential substrate candidate. Is this possible at all? Does this make sense at all? Are the isotopic signatures between substrates different enough to make this possible?
Thank you very much in advance for your replies!!
Wheat respond to irrigation application even under shallow water table conditions but regular rains at reproductive stage had very little depletion in soil moisture content.
Gravel soils (soils with > 20% gravel in the topsoil) or gravels distribute throughout the soil
It is no doubt affect the plant growth and its development especially in supplying nutrient, and fertilizer amounts, root penetrate and store and supply water etc.… for a certain crop. So, many questions have arisen for these issues?
How much a plant physiologically and morphologically differs when it is grown in gravel compared to those grown in non-gravel soil?
Until which percentage of gravel we can classify this land is invalid to cultivate a certain crop?
Which suitable irrigation system valid for such soil (Gravel soils)?
Which crop is more suitable for this soil?
Therefore, my request is the practical suggestions to solve this phenomenon is very importance, besides the literature review, articles, and technical report also are needed.
I'm doing a reiciprocal transplant of plants and soil in the field. Pots with soil and plants will be buried into the natural soil at each site and followed for phenology / growth / etc. I know folks have done this type of thing before, but wondered if anyone could point me toward literature comparing soil water status inside and outside the pots -- does it equilibrate pretty quickly? The pots will have drainage holes (covered in mesh).
I want to compare the competition pattern of crops and weeds growing in same experimental field. For above ground I am considering height, seed, leaf(LHS framework). Specific leaf area and height (etc) can be compared to explain nutrient retention. How can we compare the competition pattern for below ground. I am considering roots. What are some parameters that I can compare with the soil. Can any one shed a light into this or any articles which has compared nutrient uptake pattern in weeds and crops would be really appreciated.
Which of these parameters (translocation index/transfer factor) is the best indicator of a species' capacity to extract heavy metals from soils?
I want to do a survey about the irrigation water management situations in poplar plantations in the world, so I have some questions which I ask for the help of the researchers and scientists from different countries. I wish you can spend a little time to help to give an answer. Thank you very much for your help!
Q1: Whether the poplar plantains are usually irrigated in your country or a region of your country?
Q2: If poplar plantations are usually irrigated in your country or a region, which is the widely used irrigation technique? Drip irrigation, flood ir, furrow ir, sprinkling ir, or border irrigation?
Q3: If these plantations are usually irrigated, what is the method used for determining irrigation amount? (A. Basing on experiences; B. Basing on the precipitation; C. Basing on the soil water status; D. Others (please give a simple description)
Q4: If these plantations are usually irrigated, what is the method used for determining when to initiate the irrigation or the duration between two irrigation events? (A. Fixed the number of irrigation events in a growing season or fixed the duration between two irrigation actions; B. Basing on the soil water content or soil water potential; C. Basing on the tree water status; D. Others (please give a simple description)
Q5: What is the productivity (m3/ha) of the irrigated poplar plantations in your country? What is the species?
Reading more and more about agroforestry / reforestation / water availability I came across hydraulic redistribution (https://www.researchgate.net/publication/221752819_Water_release_through_plant_roots_New_insights_into_its_consequences_at_the_plant_and_ecosystem_level) performed by various types of vegetation. It sounds to me a very interesting option for agroforestry to use this kind of "bio-irrigation".
Since it is a purely biophysical process, I am wondering the following:
The amount of plants where hydraulic redistribution is proven is quite limited (based on literature I have compiled a list know around 200 species where hydraulic redistribution is proved), probably because the needed research takes quite some time and is labour intensive.
But it seems that the deeper the roots, combined with a heterogeneous soil, the higher the chance that hydraulic redistribution can take place.
In some species, hydraulic redistribution may not occur due to the prevention of water outflow, because of the fact that there is a deposition of suberin in endodermal and exodermal tissues.
Is there any research carried out on the thickness / existence of the suberin on roots, in order to distinguish which plants are likely to perform hydraulic redistribution, and which plants are unlikely to perform hydraulic redistribution?
Can anyone tell me about the PGPRS/BF strains that having wider functional ability (N fixing, P and K and Zn soliloquizing ability).
I am currently doing a research work in plant nutrition and nitrogen uptake is a regular phrase I come across in many papers. Could someone explain to me the meaning of this phrase? Is it absorbing of mineral by plant roots or the transportation of the mineral from plant roots to other parts of the plant? And again is there any model (equation) plant root absorption of nutrient from the soil to the amount of nutrient in the soil?
Firstly, I want to know the role of carbon black in soil restoration, perhaps it is effective in soil conditioning (fertility increase etc). Also, i would like to know if there is any empirical research on the role played by carbon black in reduction of phytoavailability/bioavailability of metal contaminants in the soil to plants and reduction in soil mobility.
Lastly, i need experts opinions on the best methods of characterization of carbon black (detailed procedures). Thank you all
We are preparing a project that intends to study how the climate change affects the distribution of Arbutus unedo, but the literature that we found about environmental factors affecting the species distribution is somehow vague. Most of the literature have general indications about the species ecology.
Thanks in advance
i want to ask if it exists simple protocol to quantify Na+, K+,Ca2+ and Cl- , in plant tissues (root or leaf) without using Photoelectric flame photometer ?..just using UV Visible Spectrophotometer ..and if it is not possible why ? Thanks .
Some crops, for example grasses, have high capacity to accumulate silicon, mainly for the use of the element as strategy tolerance and resistance against abiotic and biotic stresses. In this context, due to the expressiveness of the species Opuntia ficus indica for semi-arid regions, it is questioned whether the species is a silicon accumulator and what levels (%) of Si in the tissues would characterize it as accumulator or not of this element.
We often read that fertilizer dose to a crop will change with soil type. This means there are some factors peculiar to a soil which affect nutrient availability to different crops in different way. What are these soil factors/ properties/ characteristics (apart from rainfall, climate and length of cropping season) which affect fertilizer response?
To ask the same question in another way: Why do we have to study fertilizer response of a given crop to a soil type. Why fertilizer dose will vary with soil type? What is it about the soil that cause this variability?
We think about transplant rare plant species from nurseries to the rehabilitated ecosystem. However soil pathogens (fungus, invertebrates and others) associated with the transplants have to be reduced to = 0.
Do you have any idea or protocole.
First, we plan to use substrat of destination.
Second, to isolate this substrat from the nursery land with elevated table.
Thanks for you advice
Dear all, I want to know how to inoculate the soybean with rhizobium (in liquid medium). The rhizobium is cultured well in the liquid medium.
I will make a research on tomato root exudates in a system of rhizoboxes, using filter paper discs, but i need to reduce expenses.
Can I to use alternative materials to PVC to manufacture of rhizoboxes?
Can I to plant various plants (replicates) per box?
What is the best filter paper to use in this case?
What care should I be taken in the moment placing the paper discs?
Do you have some pictures that you could send me about of mounting of the rhizoboxes?
I appreciate immensely.
I undertook KCL extraction to measure soil nitrates. The samples were analysed in the Autoanalyzer by a lab technician. I am therefore unsure of the process that identified the quantities the different mineral N forms - ie. ammonium vs nitrates. I have my extractable nitrates data. Is there a chance that some of it is ammonium nitrogen rather than nitrate nitrogen? Or is that not possible-? They were on the shaker for one hour prior to analysis. This is particularly relevant when thinking about the observed trends - In my biochar amended samples: with increasing irrigation levels: my plant yields increased yet nitrates decreased. Apologies this could be a silly question.
It seems biochar could have buffered the effects of low nitrates, by increasing NUE, allowing there to be higher yields at the lowest nitrate levels. However it could also be that the high concentration of nitrates retained by biochar, was actually deletrious to plant grown. There thirdly could be no correlation between decreasing nitrates and yield and in fact yield increased due to other factors such as N mineralisation by increasing microbial activity (due to presence of biochar). Many factors at play and it would be useful to confirm that none of my nitrate N is actually ammoniun N.
Anyway help would be appreciated..
I want to change the current microbial communities in one soil into the communities from the other soils. I'll first sterilize the former soil. So question is how can I inoculate sterilized soil with communities from the other soils. Should I use the supernatant of the soil slurries or add fresh soils to the sterilized soil? How long will it take for the communities to recover in the sterilized soil? The recolonized soil will be used to grow the plant.
At minimum would like ammonium and nitrate, total C and N, total P. Obviously accuracy and reliability is the first priority, secondly would be price and third would be turnaround time.
which plant is an excellent trap to pot culture AMF? which plant can capture more diverse AMF species?is there a difference of choice of trap plant species when we want to multiply single AMF species and when we want to multiply as much diverse AMF species as possible?
For your information, I want to know the amount of water in each 20cm in the depth of soil layer.
Do you think Nuclear Density Meter can provide this information in the depth of the soil.
It is said , if soil is the stomach of the plant , microbes are the necessary vehicles indulging into transformation and availability of different nutrients , besides different ecological services including carbon sequestration. On the other hand , nature and properties of a soil are the collective function of climate , relief , organisms , parent material ,and time. But , still, soil microbes by and large, are considered pivotal to crop performance via variety of diverse functions. In this background, i propose following sets of questions to my learned colleagues for their valued interaction :
* Do you feel, nature and properties of soils govern the the microbial load?
* If so, what are the dominating soil properties that govern the soil microbial load?
* Is there specific requirement for proliferation of different soil microbial communities?
* Whether or not, such specific requirements further change from genus to species /strain level of a microbial community ?
* Is there any crop specific distribution of different l microbial communities of a soil ?
* What is your opinion about the greater necessity of crop specific microbial inoculation ?
My thank and regards as well
Does anyone observed a positive correlation between nickel and magnesium (or calcium) in plants growing in serpentine soils?
We very often raise the issue of declining soil fertility on account of depletion in carbon pool of the soil , which probably has equally revealing implications on plant health. An enriched carbon pool of soil has has many ecological functions to serve, besides safeguarding the quality of the soil against soil degradation forces. But, our experiences reveal it is probably equally difficult to elevate the carbon storage capacity of the soil, regardless of practices. I have the following set of questions to my learned colleagues to respond:
* How far different fertilization practices aid in building the carbon pool of soil irreversibly (Not lost back to atmosphere)?
* How can we ensure what fraction of soil carbon pool is aiding towards soil health and plant health?
* How can we decide the capacity of different crops to sequester the atmospheric carbon in plant canopy framework?
* Do you feel carbon pool of soil dictates the carbon storage capacity of plant?
* How can we correlate the soil carbon pool and ecological service in a given agro-ecosystem?
* How far conservation agriculture is effective in improving the soil carbon pool in irrigated areas?
Does endophytic fungus Phomopsis liquidambari have promotes the growth and yield of rye , wheat, and maize or just promotes the growth and yield of rice?
I mean, if I inoculate Phomopsis liquidambari in seeds maize, I will get seam result that they got in rice.
IS possible inoculate Phomopsis liquidambari in seeds maize?
I have read in some paper that it has been seen that some mycorrhizae may reduce water uptake.
I wonder if someone of you has ever found that after inoculating mycorrhizae, the conditions of the plant are worse than in the control plants.
thanks a lot
Dear restoration enthusiasts
I am currently working on my master thesis concerning the application of cheap microcontrollers in ecosystem and landscape restoration monitoring. One main target is to assess the feasibility of low-cost, adaptable monitoring devices. To enhance the output of my thesis, I designed a short survey, designated to include knowledge and experience from restoration enthusiasts all over the world. Therefore I wanted to ask, if you could take a few minutes of your time to fill in my survey. You won’t only help me, but possibly enable broader monitoring, improve efficient use of limited funding and thereby enhance future knowledge. If you have any questions, just contact me.
You can access the survey at:
If you know other people involved in ecosystem and landscape restoration, feel free to send them the survey too.
Thanks a lot for your time
Lukas Gemperle – ETHZ - Switzerland
I am going to add different amendments to soil in order to increase soil water capacity. Can you introduce me some new methods and amendments for this purpose?
Is there any correlation of soil organic carbon, inorganic carbon, total carbon and total nitrogen concentration with leaf total carbon and total nitrogen concentration?
what are the soil fertility requirements (pH, P, K,Mn,Cu,Bo,Ca,Mg levels ) and nutrient removal figures for pyrethrum?