Questions related to Maize
I am designing a trial for my PhD investigating the effects of vermicast on three commercially grown crops (onions, potatoes, maize). Soil transport will depend on the types of machinery used (power harrow, ripper, disks, potato harvester). I am unsure how long to make buffer zones between plots to avoid dilution of vermicast in the core sampling area. What search terms/phrases should I use to find research about the distance soil can be transported during passes?
My Objective is to simulate the impact of climate change on maize yields in Isingiro District under future climate scenarios. 0.8435° S, and 30.8039° E
Where can I get the above R Scrit for simulation for RCP4.5 and RCP 8.5 from?
Will be greatful if any one who has can share with me
Hello specialist. I am working as a field technician for maize seed production. I would like to ask someone with experience in yield estimation of maize by tools or any calculator. I have been sawing on the internet, that people use satellite data, but I don't ins and outs of that. please introduce and guide me. Many thanks.
I want to simulate the maize grain number with 6 level temperature stress experiments by APSIM-MAIZE. I have tried to modify the temperature fuciton from the default value (8, 34, 44℃) to a modified value (5, 30, 41℃), which concluded from Wang (2018).But, the simulation was not good for grain number.
(1) how to modify the temperature function with my heat stress experiments?
(2) what's the calculation formula for maize grain number in the Maize Module?
in addition, my phytotron controlled-temperature experiment were conducted with 6 temperature from 30 to 40℃ during maize silking period.
I am a agricultural adviser in Huambo in Angola, which is said to have the most fertile soil in Angola, what I can't see here really.
Wheat and maize were here planted for 2 years and irrigated with a pivot sprinkler system to ensure emergence in the dry season, but yields was yet with only moderate success. The corn yield was just as weak as that of other farmers in the area. I estimated that the maize yield is only around 1000 kg/ha. After the harvest residues, the wheat was only ¾ with a height of 1 m.
The soil with about pH 5, is a grey silty-sandy soil, presumably because the soil is 500 m from a river. But here isn't a laterite of rusty-red coloration like most soils here and that laterite are more remote from rivers.
My specific question is:
What is the best choice of soil preparation, fertilizing and which seed varieties to cultivate and gain best yields for wheat and corn on juvenile soil cleared before such acid and very sandy soils? Precipitation ist 1300 mm per Year.
The farm worker prefer to SEED and fertlize all by hand. Soil preparation and seed covering is done by harrow disks.
J HUMER, 18.7.22, Huambo
For Example from one maize hectare of land we will get 80-120 qt/ha by using soil test based recommendation with recommended agronomic practice. But from one maize hectare of land we will get 25-35 qt/ha by using soil test based recommendation with recommended agronomic practice.
screening for herbicide resistance and identify genomic regions associated with it in maize
If you add a response, please do me a favor and answer the actual question. I've already searched the literature and haven't found anything. I already know what exudates are, and that they are different under stress conditions. To reiterate, I would like to know the SPECIFIC CULTIVARS of maize that have high exudation rates, under just basic field conditions, not any kind of stress.
Is there anybody suggest or describe this maize disease (cause) or Deficiency of minerals? This days common on some maize farmers in Ethiopia.
Or do you have knowledge or ideas where to get thiee MAIZE informations?
I see everywhere maize fields here with only very low maize yields, with about only 1 t/ha maize.
We in Austria have about 10 - 15 t / ha.
This Huambo region should be the best agricultural region, is written.
I am advising a new farmer here, but there is no knowledge about this requirement.
I want to determination the root activity of maize, who knows a fast way to determination the root activity? Thank you for your kind help and comments?
Struggling to get good quality DNA from dried maize leaf samples. Used modified CTAB protocols, without liquid Nitrogen but had smears on my gel. Anyone to help with a protocol that works best for extraction of DNA from Maize leaf samples?
I a Wifi Thermometer which is portal with an API for data sharing. I would to use it in an experiment for Maize grain storage facility (a shade).
At the beginning of fermentation, the pH of the mixture of barley and maize is 4.5. However, the pH of barely alone is 5.3, and maize is 5. 6. Thus, what are the possible reductions in pH in the mixture?
I am based in North West Province, South Africa. North West is a land locked province, with mainly summer rainfall and dry winters.
Summer is around September to March and Winter June/July to August.
This year we had more early winter rains. This is not normally the case.
I have started seeing these caterpillar/worms with a black body, with hairs al over, with some white hairs on the body.
What are these caterpillar/worms? Are they harmful to maize, soya, sorghum or sunflower seed/plants?
Dear colleagues, I'm looking for published statistics on global percent area used for production of wheat, rice and maize. I know that there are some data on global production and data on estimated global irrigation that I could use for an analysis. However, I would like to see first if there is this information already published by someone.
I am doing a PhD and one of my objectives is to use DSSAT for modeling effect of Climate change scenarios on maize productivity in SW Uganda. My study area lies btn
0.8435° S, 30.8039° E
Where can I download the above current climate scenarios datasets for simulation of impact of cc on maize yield ( early, mid and end of) century?
I would like to ask if there is a Standard, guide, manual or well-explained procedure to do the "pot experiment", also known as "plant growth experiment" (there is another name for this experiment?). Additionally, if there is a special one for maize growth, that would be great.
In fact, I read several articles where this experiment was used, however, in none there was mention of a standard, protocol or manual. I am kind of surprised about it, as this procedure seems quite important.
If you have any tip, article, thesis or any trustable document that I could use to guide me, that would be great. I plan to do this experiment with a collaboration, however, I need to know better the procedure to plan ahead.
I thank you all in advance for your time and attention.
Have a great week.
- We expressed a maize CC-NBS-LRR protein in Nicotiana benthamiana by injecting the Agrobacterium strain GV3101 with a maize CNL protein into the leaves, cell death was observed after 3 days without the presence of the cognate pathogen effector, Does this happen often?
In general fall army worm will feed and cause damage by feeding in whorl of Maize. So we are recommending whorl spraying of different mode of action insecticides against FAW. But recent some studies found that whorl application of insecticides by mixing with sand is best option. Is this really effective??
Hi everyone! I wonder if anyone could indicate me an efficient and simple protocol for separation of leaf tissues (epidermis, mesophyll, vascular tissue) that could be used for crops, such as tomato, soybean, maize, etc.?
I appreciate any suggestion given.
Root length, root biomass and types of root determine the nutrients absorption, tolerance to drought and lodging and ultimately optimum plant growth and productivity. Is there any simple field based procedure to grow maize plant in field and to determine total length and biomass of root? An efficient and simple protocol may help in screening maize germplasm for root parameters.
Dear RG scholars, GREETINGS!!!
- I'm relatively new to CROP MODELING and Simulation
- As you all know, modeling is so interesting but as wide as an ocean.
- Modeling includes many challenging topics such as model calibration, parameter estimation, reliability assessment, data collection design, and a lot more.
I'm doing my research on "Model simulation of maize growth and yield using DSSAT-CERES-maize model v.4.7.".
No model was done before for my location.
I'd two-year experiments using 3 maize varieties and 5 nitrogen rates for a new
(same location but different years).
- 1st year for model calibration
- 2nd year for model validation
- My maize is rain-fed maize
- I've 30 years of climate data (RF, Tmax & Tmin)
- I've soil and plant lab analysis results
What parameters, mandatory data, and what max and min values should I have?
What vital steps should I never forget?
What yield components of maize should I focus on?
Your experience, please? And any relevant reference you think is good for me!!!
In India the soil health cards are being issued to farmers since last 6 years. However, it is not possible to have soil health cards for each and every field till today. We know that whenever we have a bumper crop of sorghum, maize, rice, wheat etc. the soil nutrient status changes after every crop season. Under such situation it is required to measure the soil nutrient status after every crop season. Therefore, we need to have a fast and accurate measurement system which can provide the soil health card to the farmers in his field itself so that he can plan for fertilizer application rate just before the crop sowing season. Under present laboratory analysis method it takes months to get the soil health card and by that time the crop sowing season is over.
Nitrogen is the most limiting and the least efficiently used (NUE is 0.3-0.5 in developed countries) plant nutrient.
But what most gets me in doubt is the time of nitrogen fertilizer application.
- Some say before planting (African Farm Resources Center, attached herewith)
- Most say during planting (N.B. maize takes 6-9 days to emerge, but still not active to use fertilizer)
- Only a few say after planting.
Which one is scientifically correct? Please include references!!!!!!!
I don't know if Nitgen fertilizer has other uses in the soil than as food for the plant. Some well-experienced farmers have told me that Nitrogen dehydrated water-logged soils; "It ignites the heat that helps seeds to emerge profoundly"!!!
Appreciate your valuable help for all in doubt like me!!
Given the diverse use of maize for human consumption, animal feed and industrial raw material, is maize is going to play as a major rabi crop in the coastal region in general and coastal saline region in particular.
Please give comments on how to increse the maize acerage and reduce the fallow area as well as increase farmers income.
- Five cereal crops provide 60% of the daily food intake worldwide!!!
- Three cereals (rice, maize, and wheat) cover more than 50% of food intake.
- Maize is regarded as a "Hunger-breaking crop", particularly by the poor farmers of Africa.
- Today, climate change is the biggest threat challenging agriculture. So, which crop is more vulnerable to climate change (rainfall, temperature, etc.)?
- Maize is getting wider destinations even to new places due to its special characteristics. What do you think are its special merits for its popularity?
- Which of the 3 popular world cereal crops would be the 1st in 2050 and/or 2100? Why?
Thank you for all your valuable responses!!!
In my case, we use 150 kg ha-1 for OPV and 200 kg ha-1 for hybrid varieties are recommended to be applied with three splits: 1st at planting, 2nd at knee height, and 3rd at flowering (silking and tasseling). But, still, farmers of the lowlands (hotter areas) use less than this rate and generally miss the 3rd split due mainly to fear of the burning effect caused by high temperature and/or low moisture.
What is African Farm Resource Centre telling us?
"For hybrid maize, 400 kg ha-1 of NPK is recommended to be applied just before planting, which should be followed up four weeks after planting with 250 kg ha-1 of CAN as side-dressing."
400 kg ha-1 before planting + 250 kg ha-1 after planting"
- How is this possible?
- Is that logical? I don’t understand it!!
- What about the law of diminishing returns?
- Could poor farmers afford this? Is this acceptable by farmers?
- What would be the benefit-cost ratio of this? Is this economically feasible?
- Nitrogen fertilization is the main cause of Carbon Footprints in agriculture. Did African Farm Resource Centre consider this?
Many thanks and respect to all RG members!!!
What is the optimal temperature for grain filling stage in maize? How lower temperature than optimal at this stage affects plants?
When the issue of intercropping is raised, most researchers, including myself, are addicted to the idea of intercropping cereals with pulse crops and the first reason that comes to our mind is the "nitrogen fixation", i.e., restoring the fertility of the soil.
But when doing my research on intercropping, I had the chance to come through seeing farmers intercropping maize with sorghum (obviously, both are cereals). I was really surprised a lot!!!
- What do you think is the farmers' reason?
- What other forms of intercropping did you know? What with what?
- What advantages (reasons) of intercropping do you know beyond the well-known fact of enhancing soil fertility?
Wish you all the best this life can deliver!!!!
I'm doing my research on modelling of barriers (limitations) and determinants (social constraints) of maize farmers' adoption of adaptation options to curb the negative impacts of CVC (climate variability and change) using the MNL model.
For the results of the MNL regression model, I'm using the assumptions of IIA (the Hausman test), the VIF, and the contingency coefficient that need deep result interpretation.
But in the STATA software, both the terms contingency coefficient and correlation coefficient appear, of course with different values.
What is the conceptual difference between the contingency coefficient and correlation coefficient? What best example do we have to differentiate them for better understanding?
THANK YOU SO MUCH!!!
We know rice is a C3 plant. In context of rising global temperature, C4 plants (maize, sugarcane) are likely to have some physiological advantage over c4 plants. Rice scientist have been working to develop c4 rice varieties. What is the prospect of c4 rice varieties in rice growing Asian countries?
What number of days to 50% silking can be used to predict the maturity of maize? for example early maturing verities may have a range 56-63 days to 50% silking.
I performed a fungal and enzymatic treatment in the lab and now I will do this pretreatment in the field. In my opinion if we add the fungi directly to the field there will be a great risk of contamination. Or, even if there will be contamination, the control will give us a difference?
thanks in advance for your feedback
I'm looking for a study on the utilization of cover crops or green manure in corn fields that was conducted in China. I'm curious to see how cover crops or green manure affect the SOC over there. I'd love it if someone could send me some papers or other information. My main interest are cover crop/ green manure, SOC and Corn/maize.
We are having a seed dryer soon in our Farm. In our assessible markets, grain dryers are common but getting choices for seed dryer is not. I am concerned about germination of seeds if dried in grain dryer which doesn't have temperature control options. Please suggest me mechanical seed drying options suitable for a farm that produces seeds in about 30Ha of land.
I've tried proline determination assay (Bates 1973) on maize leaves, but it didnt work. Though it worked on maize pulverized seed (not lyophilized). Anybody knows if there's something wrong with lyophilized tissue and this specific method? or something with lyophilization procedure?
When you looked at the CV of the yield component data including height is very low compared to the grain yield, then it is very difficult to generate data that relate final yield data with height for example. This is due to subjectivity of the researchers! Is it not better to fix at office where to take the plant sample ( plant height ) ?
Seed carbohydrate composition as affected by some soil or foliar applied substance
- This is Entomopathogenic fungal isolates screening experiment under laboratory condition. We want to calculate feeding percentage of S. fruigiperda larval instar as we provide specific quantity of maize leaves to each instar. We count the data after 24 hrs/ 1day which goes up to 10 days. We provide 7, 12, 20, 30, 45 and 60 gram maize to 1st, 2nd , 3rd, 4th, 5th and 6th instar respectively. The maize quantity is for group of 15 larvae and we will replace it after each day. We observed that S. fruigiperda slow down feeing efficacy against some fungal isolates as compared to control. We didn't use leaf disc method because it was not convenient for us. it will be really appreciated if someone can help us to find the formula by which we can do statistical analysis.
I have collected data on F1 and F2 yield and one of the hybrid varieties showed increased yield in F2 generation. I have re-checked my data but there seems to be no mistake in data collection. Is it a mere chance or technical error?
Recently, I plan to detect some mRNAs expressed level of whole life stage of maize weevil, but I don't know how to collect it's eggs. So does anyone have some experence of collect the eggs of S. zeamais, S. oryzae or S. granarius ?
Any chemical or hormonal or environmental or procedural manipulations that can help to improve the seed set when secondary/tertiary gene pool is used in crossing programme with accessions of primary gene pool. Any validated experimental proof/information in general in any crop species but in maize as a specific crop species may serve the purpose.
Selfing is necessary application for pureline production of maize parents for hybrid production. I want to learn different approaches for selection.
I have this data set about the concentration of aflatoxin in maize. most of the means have very high SD. What should i do about this when reporting?
This Defect has seen nearly 2 or 3 plant in 1 hector of land.
Specifically looking for deficient, low, adequate and high ranges for the key nutrients (N, P, K, Ca, Mg, Zn).
Moreover, may also require the plant biomass nutrient ratio ranges for N/P, N/K, P/K, P/Ca, P/Zn, K/Ca, Ca/Zn etc
I would like to investigate the linkage disequilibrium in maize collection with TASSEL in order to determine the marker number for population structure and GWA analysis.
Our maize collection have been genotyped with maize DArTseq (1.0) by the Diversity Arrays Technology Ltd. So I have two types of markers:
(1) dominant silicoDArT markers (Presence/Absence variation of restriction fragment)
(2) codominat SNP markers in the restriction fragments
Can I mix this two types of marker data in the hapmap file and run the LD analysis?
Is it appropriate to mix two different marker data when I perform LD analysis?
Or should I make one hapmap file for silicoDArT markers and one for SNP markers and perform the LD analysis for the two marker sets independetly?
Thanks for your help!
I am currently working on a project and I need to know the pros and cons, the applications, and even the limitations of vegetation indices particularly those that are useful in the RGB spectrum in the assessment of crop health. The crop in question is maize.
When a Maize plant is given normal condition for growth development, stand & establishment, it grows without tillering. But, when it get infected by any infestans for eg, Stem borer or FAW that infestes on Plant whorl making it unable to grow any further tall.
Maize (Zea mays L.), a crop with very much of nutritional & dietary importance doesn't have good yield & productivity(2.84t/ha in Nepal & 5.82t/ha in world in 2019 ) (FAOSTAT, 2021)as the plant is tall & do not bears any tillers. And the demand of Maize cereals as food & concentrate will increase a geometrical ration on future. The study on breeding to make Maize; a tillering type of cereal crop had not been heard by me. So, I want to ask what are the research the aforementioned subject?
Greenhouse trial was established with different fertilizer formulations. Is it possible to calculate fertilizer use efficiency after harvesting biomass at 5 weeks after emergence and determination of weight and tissue nutrient concentrations?
Since multiple alleles are working for variation in different individuals for a particular trait due to mutation over the wild allele, which leads to functional features or traits, how different features/traits observed in one individual like different hair color in some animals, different seed color in maize, etc? How this feature is also related to evolution?
I'm working on the flowering of maize, and more particularly on ASI. This year i would like (for my job) to make a selection in the objective to reduce ASI. But I didn't find any informations about how to do in litterature. Could you help me please?
Thank you very much
Recently some farmers have claimed that they are making use of paddy straw in making maize silage by adding some percentage of paddy straw. Therefore, is it possible to use paddy straw for making silage of maize+ paddy straw or in combination with other nonleguminous fodders? Kindly give your remarks.
I am planning to collect popular local maize varieties and carry out conventional maize breeding (bulking method). I don't have a clear idea about it.
I want to conduct one experiment on Habitat management using a push-pull strategy. This involves intercropping maize with a “push” plant, such as Desmodium, that repels FAW from the field, and planting a crop along the field boundary (e.g. Napier grass or Brachiaria spp) that attracts or “pulls” the FAW away from the maize. So i want to know the where i will get the Desmodium and Napier grass seeds.
As an experiment to study high temperature effect on pollen abortion I need to have some viable flowers to start with. I have gone for two sowing dates first week of feb and first week of March with sufficiently high temperature during these days. However I am getting only 5 to 8 % floweirng. Can foliar application of any phytohormone help?
Recently, I conducted an experiment on maize under control conditions in white sand with two treatment variables ( 1; irrigated with distilled water and 2; irrigated with 60mM NaCl solution) and 40 replications. After three weeks I collected the data of SPAD from the first large leaf of each replication. I observed that 60mM NaCl treatment significantly increases the SPAD value with respect to control (treated with distilled water). Is it normal?
Almost all research reports which i ever seen work on Early mature embryo for Agrobacterium mediated maize transformation. In other grass families like rice, we can use mature seed and what do you think this will work in maize?
I want to download chromosome wheat genome sequence v 4 from IWGSC website but can't find a way to do so. Secondly I want to perform BLAST search using GENEIOUS software can some1 suggest any other appropriate software to BLAST, in which I can compare genetic architecture of different Spp. (rice, maize, wheat, barley) ?
I am growing maize plants in lysimeter for my experiment. The medium for growth is sand mixed with organic matter and garden soil. The temperature of the region is 22 C/15 C, recently I observed some nutrient deficiency with the symptom of yellow lines and slow growth (image attached). Please help me to identify this nutrient deficiency.
internode length above the uppermost ear or leaf of the ear or below the ear and if yes, then between which numbers of leaves. Thanks in advance.