Ancient irrigation systems
what early irrigation systems??
how irrigation works ??
What are the irrigation crops ??
what need for irrigation ??
The first people to grow plants had to learn three main tasks: how to concentrate desirable plants in a manageable area: how to prevent weeds from growing there, and how best to encourage the plants to flourish. In short, people have learned to plant crops, weeds, and water or drain. In the climate of England, there is enough natural rainfall to staple crops. But in a dry climate, most crops need water, and must be submitted by the grower. Irrigation was the technology behind many of the greatest civilizations of the world.
But irrigation is not easy. Usually, irrigation systems require a large investment of money or work or both. The water supply must be safe and reliable. In each growing season, water of good quality must be delivered at the right time and place in the right quantity at the right price, and irrigation water must then be evacuated cultures. Even within one growing season, irrigation systems require ongoing maintenance.
The long-term risks of irrigation are even greater. Investment in irrigation projects pays better in dry areas where evaporation is high. The water is never pure, but has dissolved mineral salts. Evaporation will therefore be even saltier. Rivers flowing through dry or desert areas lose water by evaporation, and become salty. For example, the water in the lower part of Colorado contains more than one tonne of salt per acre foot of water.
Many areas in dry climates have natural lakes of brackish or salt, or salt marshes, even dry. Soils are often loaded with lime (calcium carbonate) or salt (sodium chloride), and many sedimentary rocks contain natural salts. Irrigation areas may therefore be promising natural salts in rocks or soils that are easily transferred into the fields as soon as irrigation water is applied, and even that water can come from rivers that have become more saline through evaporation along their course.
As water is used on crops, it spreads into a thin sheet, exposed at the surface. Much of it can evaporate, making it saltier. It can dry up completely, leaving a thin layer of salt and soil. Even under normal circumstances, plants absorb soil moisture, leaving behind the excess salts. Finally salts accumulate in the soil surface until they become sterile. Over time, therefore, dry soils in irrigated areas tend to become salinized.
The only way to solve this problem is to apply enough water so that the salt is rinsed or flushed through the soil. Rinsing should remove salts from the area altogether, along natural or artificial drainage. In well-drained areas with a dry season and wet season, a natural blush is held annually. But in poorly drained areas, overwatering simply mobilizes the salt while the water table rises to ground level.
Capillary action draws the salt water on the surface, where dry salt as a surface deposit, and the problem has worsened rather than improved. Once the soil is saturated with water to the surface, there is no way to salts leaching through soil, and fertility of the region is destroyed, except the main drainage channels are constructed to remove salt.
Even rinsing may not be a net benefit of the environment: hot flashes simply provides salt elsewhere, perhaps to downstream users, or in groundwater. Flushing also leach away nutrients from the soil with salt.Therefore, irrigation can not be maintained over a long term basis under the following conditions.
Water is applied so that the salt is not allowed to develop in the ground. Usually, this means that lots of good quality water is applied, and that drainage is fast and efficient. Soils need a large infusion of fertilizer, to balance the hunt that is required to keep them without salt.
Cannals were dug from the river to farmers’ fields. As technology has increased, the tanks were surrounded by stone dams to retain more water and keep water in the basin for long periods. Later, the ponds were man made to move them to where they were needed. This method was replaced when the system was designed cannal.
ancient irrigation systems
ancient irrigation methods
ancient irrigation canals
ancient irrigation system used in himachal pradesh
ancient irrigation systems in sri lanka
ancient irrigation system in sri lanka pdf
ancient irrigation methods in india
ancient irrigation works in ceylon
ancient irrigation techniques
ancient irrigation article
ancient african irrigation systems
ancient egypt irrigation and farming
ancient irrigation systems and practices of sri lanka
ancient egypt and irrigation
ancient egyptian farming and irrigation
amazon ancient irrigation
about ancient irrigation
an ancient irrigation system
ancient babylonian irrigation system
ancient egypt basin irrigation
ancient chinese irrigation systems
ancient china irrigation
ancient chinese irrigation
ancient china irrigation system
ancient civilizations irrigation
ancient chinese irrigation pump
ancient chinese irrigation methods
ancient irrigation definition
ancient irrigation ditch
ancient drip irrigation
irrigation ancient egypt definition
dujiangyan ancient irrigation system
ancient egypt irrigation
ancient egyptian irrigation
ancient egyptian irrigation methods
ancient egypt irrigation system
ancient egyptian irrigation systems
ancient egypt irrigation canals
ancient egyptian irrigation canals
ancient egypt irrigation facts
ancient egyptian irrigation facts
ancient egypt farming irrigation
ancient egypt irrigation system facts
irrigation from ancient china
ancient greek irrigation
ancient greece irrigation
ancient greece irrigation systems
ancient hawaiian irrigation system
ancient china have irrigation system
ancient irrigation in sri lanka
ancient irrigation in mesopotamia
ancient irrigation in india
ancient india irrigation system
ancient inca irrigation systems
ancient india irrigation
ancient irrigation system in sri lanka
ancient egyptian irrigation ks2
ancient egypt irrigation ks2
ancient sri lanka irrigation system
ancient irrigation technology in sri lanka
ancient irrigation technology in sri lanka pdf
ancient irrigation system in sri lanka ppt
ancient irrigation tanks in sri lanka
ancient mesopotamia irrigation
ancient mesopotamia irrigation system
ancient mayan irrigation system
ancient mesopotamia irrigation canals
ancient mesopotamia + irrigation system pictures
ancient irrigation system
ancient of irrigation
ancient irrigation system of sri lanka
ancient methods of irrigation
ancient methods of irrigation in india
ancient types of irrigation
ancient ways of irrigation
ancient systems of irrigation
ancient use of irrigation
ancient irrigation practices in sri lanka
ancient persian irrigation systems
ancient roman irrigation systems
ancient rome irrigation
ancient roman irrigation
ancient egypt nile river irrigation
ancient irrigation system in india
ancient irrigation systems in mesopotamia
ancient irrigation techniques in india
ancient egyptian irrigation techniques
ancient egypt irrigation techniques
ancient egyptian irrigation tools
ancient egypt irrigation video
ancient irrigation system video
ancient irrigation wikipedia
ancient water irrigation system
ancient irrigation systems work
ancient egyptian water irrigation
Source: https://egy-king.blogspot.com/2020/07/ancient-irrigation-systems.html
Anyone can join.
Anyone can contribute.
Anyone can become informed about their world.
"United We Stand" Click Here To Create Your Personal Citizen Journalist Account Today, Be Sure To Invite Your Friends.
Before It’s News® is a community of individuals who report on what’s going on around them, from all around the world. Anyone can join. Anyone can contribute. Anyone can become informed about their world. "United We Stand" Click Here To Create Your Personal Citizen Journalist Account Today, Be Sure To Invite Your Friends.
LION'S MANE PRODUCT
Try Our Lion’s Mane WHOLE MIND Nootropic Blend 60 Capsules
Mushrooms are having a moment. One fabulous fungus in particular, lion’s mane, may help improve memory, depression and anxiety symptoms. They are also an excellent source of nutrients that show promise as a therapy for dementia, and other neurodegenerative diseases. If you’re living with anxiety or depression, you may be curious about all the therapy options out there — including the natural ones.Our Lion’s Mane WHOLE MIND Nootropic Blend has been formulated to utilize the potency of Lion’s mane but also include the benefits of four other Highly Beneficial Mushrooms. Synergistically, they work together to Build your health through improving cognitive function and immunity regardless of your age. Our Nootropic not only improves your Cognitive Function and Activates your Immune System, but it benefits growth of Essential Gut Flora, further enhancing your Vitality.
Our Formula includes: Lion’s Mane Mushrooms which Increase Brain Power through nerve growth, lessen anxiety, reduce depression, and improve concentration. Its an excellent adaptogen, promotes sleep and improves immunity. Shiitake Mushrooms which Fight cancer cells and infectious disease, boost the immune system, promotes brain function, and serves as a source of B vitamins. Maitake Mushrooms which regulate blood sugar levels of diabetics, reduce hypertension and boosts the immune system. Reishi Mushrooms which Fight inflammation, liver disease, fatigue, tumor growth and cancer. They Improve skin disorders and soothes digestive problems, stomach ulcers and leaky gut syndrome. Chaga Mushrooms which have anti-aging effects, boost immune function, improve stamina and athletic performance, even act as a natural aphrodisiac, fighting diabetes and improving liver function. Try Our Lion’s Mane WHOLE MIND Nootropic Blend 60 Capsules Today. Be 100% Satisfied or Receive a Full Money Back Guarantee. Order Yours Today by Following This Link.
| Online: | |
| Visits: | 1,689,047,776 |
| Stories: | 8,394,947 |
Whistler Blowers, Insiders
