how many types of irrigation systems in the world prevail?
486957
The following are the types of irrigation that prevail in the whole world:\n1) Flood irrigation\n2) Overhead (sprinkler) irrigation\n3) Center pivot irrigation\n4) Lateral move (Side roll, Wheel line) irrigation\n5) Drip, or trickle irrigation\n6) Subirrigation
959615
i would set up the project to include 3 different types of plants, and 5 different levels of fertilizers.  pick 3 very different types of plants that grow in different climates or conditions.  for the amounts of fertilizers, for each of the threet types of plants, put no fertilizer, this will be the control.  then put 3 varying amounts of ferilizers on the 3 of each type of plant.  i recommend 1%, 5%, and 10% (but it depends of the type and concentration of the fertilizer) of the soil quantity be replaces with fertilizer.  for the 5th of each of the three types of plants, put in 50% fertilizer, this will be your sample that shows what happens when fertilizer is totally overloaded.  i can give you a lot more ideas if you want to go in depth.  otherwise, this should give you a good start.
956994
A permanent irrigation conduit constructed to convey water from the source of supply to one or more farms.
35495
barbed wire - to keep free-range animals out of the crops.\n\nThere could be more, as listed by the previous answerer, but in U.S. history, barbed wire is quite important. \nI would class irrigation as a method more than an invention. The steel or steel shod plow allowed hard earth to be tilled, whereas the wooden or bronze plow would constantly need repair and wouldn't last long. That's the "tiller" that he talked about. Railroads had a large impact on the plains areas, contributing to the buildup of towns and relieving much of the loneliness of the plains.
34823
Just like oxygen, hydrogen, nitrogen; NaCl is found everywhere on earth.\n\nBeing water soluable, it has been getting moved around ALOT.  When water evaporates completely, it will leave the salt behind.  The dead sea is a perect example.  Left long enough the dead sea will form a solid mass of dry salt.  Salt deposits like these can be fould all over buried the world.\n\nOne of the balancing acts with irrigation is that salt will build up in soils to point that nothing will grow.
1147005
It's just patterns created by the irrigation equipment.\n\nCrop circles, people? Sure hope yer kidding...
582563
They say there are over 12,000 different kinds and possibly more that we havent discovered yet. Here is the link...
852259
Water for the system is impounded in three upstate reservoir systems which include 19 reservoirs and three controlled lakes with a total storage capacity of approximately 580 billion gallons.
371610
try this site http://www.irrigationtutorials.com/
680258
Water! Most of the earth is covered with water.
449917
Water Systems:\n\nhttp://www.ec.gc.ca/water/images/nature/prop/a2f2e.jpg\n\n95% of Earth's water is Salt Water leaving 5% as Fresh Water.  Nearly all of the Fresh water is in the form of Ice or underground.\n\nThis site appears to have a lot of data as well as activities for learning.\n\nhttp://members.aol.com/bowermanb/water.html
1029659
hm..try wikipedia seach that gives great detail on any word we try moreover agriculture etc will fetch u more than say 5 page long details\nand ya...good luck for the project!!
651684
thousands!  so many, scientists haven't even found and classified them all!\n\nthere are also industrial plants and power plants, but you don't want these in your backyard :)
352608
water is of course essential. if it comes to energy resources, egypt has a lot of oil and natural gas reserves.
1154648
how many types of grass u know?\ni only know one
375994
There are many types of grasses and here are there scientific names.
1099280
What you are seing are crops irrigated by center pivot irrigators.\n\nCenter pivot irrigation is a form of overhead irrigation consisting of several segments of pipe (usually galvanized steel or aluminum) joined together and supported by trusses, mounted on wheeled towers with sprinklers positioned along its length. The system moves in a circular pattern and is fed with water from the pivot point at the center of the arc. These systems are common in parts of the United States where terrain is flat.