Soil Definition and 81 Threads

I have some indoor plants that I didn't realize needed to be cooled in order to bloom. SInce it's too late to get cold air from outside, I'm trying to rig something to make it happen indoors (as cheaply as possible). The stem of the plant where it meets the soil is supposed to be kept around...

I read about neutralizing radioactivity in soil by using paramagnetic clays or ashes because it may chelate the radioactive particles and bind them tightly so they cannot be absorbed by the plant. How true is that?

Homework Statement A horizontal layer of soil in a tube 100 x 100 mm in cross-section. water is supplied to maintain a constant head difference of 300 mm across the sample. the coefficient of permeability of the soils in the direction of flow through them are as follows: Soil A = 10^-2...

Help With Soil Questions... Homework Statement Any help will be appreciated. The moist weight of a soil is 16.5 kN/m^3. Given w = 15% and Gs = 2.67 determine; (a) dry unit weight (b) porosity (c) degree of saturation (d) mass of water, in kg/m3, to be added to reach full saturation...

Homework Statement A*certain*soil*has*c’*=*12kPa*and*φ’*=*32°.*The*major*and*minor*principal*stresses*at*a*point*in*this* soil*are*348*and*160*kPa*respectively,*and*the*pore*water*pressure*at*this*point*is*96*kPa.*Draw*...

Does anyone know the phi factors for overturning, sliding, and soil bearing in a small reinforced footing? If you could site the precise source too, that'd be great. I don't have access to many up to date specs and codes :/

Homework Statement If Earth is considered to be metal sphere (radius = 6371[km]), how much charge Q must be deposited on its surface in order for an arc to be established in the air? If surface was charged to this value by removing all electrons from a volume of soil, how large would this...

I'm reading some books that describe site excavations. The archaeologists dig layers of dirt up to get to the ancient settlements many feet below. I'm wondering how they get buried in the first place. There are some photographs that look like a town from the ninth century with a series of rooms...

Hi all, I'm not sure if this is the right thread to post this topic. I want to simulate soil moisture and how much it decreases given a certain temperature. For example at temperature 25 degrees Celsius , what is the rate of decrease of the soil moisture? The kind of soil is clay suitable...

Hi everybody, I am searching for a project and I need help. Last year I realized that the trees which are around carpenters shops' have bigger fruits than the others. I am searching about it. Can the Iron which comes from waste neils and screws affect the soil's mineral ratios? How can they...

first of all, i not sure whether this question should be posted here. seem the soil is more related to chemistry. :confused: Is Fe the highest concentration in the experiment extraction of heavy metal from organic oxidation phase (OO phase)? If so, why? thanks for helping ya.:smile:

Homework Statement Q1) Which of the following processes decrease/decreases the amount of nitrogen in an agricultural soil? (A)leaching (B) nitrification (C) denitrification (D)Absorption by plants (E) removal of the harvest Homework Equations N/A The Attempt at a Solution I...

Soil mechanics--Triaxial test Homework Statement Generally, the triaxial tests can be classified as three types, i.e., UU, CU, and CD tests. The type of test to be adopted depends on how best we can simulate the field conditions. In other words, the purpose of carrying out a particular...

I have an orange tree growing in a pot, and lately the soil has been getting some yellow growth of some sort on it. I can't seem to find anything about it in any of my books. The plant doesn't appear to be adversely affected. Any ideas what it is? Is it a problem? Will it spread to my other...

Hi, just wanted to quickly find out what you would class soil which has water content which is lower than its liquid limit, but above its plasticity limit, thanks. Edit: I'm starting to think it just acts as a plastic hopefully that's right

Hi all, i Have a small problem regarding modeling of Soil layers.. The problem is , I need to draw 3layers of soil each measuring 3*0.7, 3*0.15, 3*0.25 .At the middle of the 3*0.25 layer i need to apply a load of 60Kpa & find out the deformation on all the layers because of that...

The soil on Mars has been found to have nutrients which would be conducive to supporting life: http://www.msnbc.msn.com/id/25396378/ All the more reason for us to go and start farming over there.

I heard that batteries can affect soil. I wanted to examine this and started to investigate into this problem. I did experiment: I planted bean into 2 pots- 1st pot: soil without batteries, and 2nd pot: soil was mixed with batteries. After 4 days, plant from 1st pot grew normally and plant...

Hi, I was wanting to test garden soil for its phosphorous content. I've seen test kits and electric/chemical kits and the like, but is it possible to do this DIY? I'd need to create a solution and have a scale to determine results. Thanks for your help.

Hi Guys, Sorry for dumping this thread in here, I really wouldn't know where this would fit... I'm a farmer in Australia and I'm trying out these really simple devices to measure nutrient levels in my soil, they're basically a ceramic container with a small hose that gets buried into the...

request book! I need a book, please help me. Handbook for the Assessment of Soil Erosion and Sedimentation Using Environmental Radionuclides thanks

Request ebook? I need a book, please help me; Handbook for the Assessment of Soil Erosion and Sedimentation Using Environmental Radionuclides. Thanks.

Homework Statement A coin of mass 10g is dropped from the top of a tall building. If after failing for 10s , it falls intosoil and penetrates to a depth of 5cm, calculate (Q) the average force exerted on the coin by the soil. Homework Equations The Attempt at a Solution...

How is soil pH affected by soil texture? any sites would be helpful alot.

This is a lab question I have for Environmental Soil Physics. Been thinking about it for awhile and I have nothing. What would be the average particle density of a mixture of 3% soil organic matter and 97% soil minerals by weight. Soil orgainc matter and soil minerals have densities of...

ok the question goes sth like this,an equation of p=c1+c2*r^0.625cos@,where p is the pressure exerted on the soil,c1 & c2 are constant to be determined,r& @ are polar coordinates.(@ measured fr the x-axis which is of direction south) now the question states that pisa lean at an angle of...

I had an interesting situation at work. One of the Faculty has a very large plastic planter filled with store bought soil. It has appearantly been sitting outdoors unused for quite some time and has become incredibly dried out with some dry dead plant material still mixed in. Yesterday there...

oh well I got my answers so now I'm just using this thread to remind me of what I want to write in my notebook thanks! THE LIST: (Add to the list...subtract from the list..etc) Spaceships Man Made Objects like Spaceships Mercury Venus Mars (Somebody said we could melt the ice...

Does anyone know if it is possible use a soil pH meter to measure the pH of liquids (ie. not soil)? Or a better way to phrase it, is there any diference between a soil pH meter and a normal pH meter meant to be used on liquids that would cause inacuracies or other problems if one was...

Recently the US government issued an arrest warrant (charge of murder) for an Iraqi citizen on Iraqi soil. Does the US government have the legal authority to take such actions on foreign soil? https://www.physicsforums.com/showthread.php?t=17475...

Do you know how many soldiers the USA currently has on foreign soil? https://www.physicsforums.com/showthread.php?t=17475