According to a 2,500-year-old tradition of Iranians on Nowruz, wheat or other plants were planted in some water and with it the brunette was preparing for haftsin table, this was perhaps the first hydroponic plant in the world that the Iranians were doing.

According to a 2,500-year-old tradition of Iranians on Nowruz, wheat or other plants were planted in some water and with it the brunette was preparing for haftsin table, this was perhaps the first hydroponic plant in the world that the Iranians were doing. 
Daily production of one ton of fodder in 33 square meters space: Using this technology in 33 square meters space, one ton of fresh fodder can be produced every day. This amount can supply daily feed of 300 head sheep, a 55-vern flock of dairy or broiler cows and a herd of 100 horses. 

Advantages of hydroponics: 

1- It can be used where it does not have proper soil or soil has some diseases. 
2- Plowing, irrigation, fighting soil pests, fighting weeds and other agricultural operations are easier. 
3- For areas where the land is expensive, it is used to obtain the most high density products. 
4- There is no soil pollution in this project and water pollution is less. 
5- It is much easier to control environmental conditions such as light, temperature, humidity and air composition. 
6- It is used in areas with saline water, even if water-soluble salts are 500ppm with a wash. 

Medium: 

Classification of hydroponic ship systems by Dr. John Larsen a variety of non-organic systems mixed 1-standing (suspended) Grohl Pete Peat Peat Mouse and Perlite 2- Food film technique sandstone bark perlite and pin bark 3-aeroponic perlite earth saw peat mouse and perlite 4-airborne ruckwol 

Ship containers: 

Currently, containers called one gallon or two gallons are more general. Today, manufacturers use a plastic bag as a growth medium. 
Note: For all growth containers, depth should be considered 3.2 to 2 times the diameter of the plant shadow when it reaches maximum growth. For example, if the shadow surface of the plant is 12 cm, the depth of the container should be between 18 and 24 cm. 2- Gaia Hani who have bigger shadow and more growth time and ganyahs that are next to the ship's containers should have more depth. 

Nutrient solution: 

The most important issue in hydroponic planting is the management of its nutrient solution, which is very important.You should know the properties and effects of different elements on plant growth so that in case of complications, you can identify the desired element and add it to the solution. 

Main and important elements:

Nine of the 16 essential elements are classified as important elements: carbon, hydrogen, oxygen, nitrogen, phosphorus, potassium, calcium, magnesium, and sulfur. 

Micronutriments (micro-brains) 

Gia Han considerably needs a small concentration of micro-brains, which are the main elements. These elements are: zinc, chlorine, copper, iron, manganese, molybdenum, and zinc. 

Hydroponic ship systems: 
Here are some methods of hydroponics. You can also do this based on the design you have in mind, but these methods have been tested. 

A) Pure hydroponic systems (real) 

1- Static system of nutrient solution This is an old hydroponic technique but is still used for food studies of different types of plants. For this method, the following materials are required 1- nutrient solution 2 - pumped air 3- a network of suitable root fibers pumps the air into the solution constantly.Air bubbles provide both the oxygen of the nutrient solution and the solution to flow. We create an air tube attached to the pump and place it in the ship's container, pour the nutrient solution into the container and put the lid on and place the plant in it.
 In this system, the nutrient solution is changed every 7 to 14 days, and water losses should be compensated daily, the volume of nutrient solution for one plant (2 to 4 gallons) is 9 to 18 liters 2- The claric method of this technique is used to study the required elements of corn and sorghum, but its nutrient solution management methods can also be used for other plants. In this system, the roots of plants are standing in a nutrient solution and other herbaceous vegetables have good growth in this system. 3- Food film technique the most important method of hydroponics an important development in the field of hydroponics occurred in 1970 with the invention of food film technique by Alan Cooper, this method is often referred to as NFT. In this method, the roots of the plants are suspended in a gill or mineral from the nutrient solution in a closed system and the nutrient solution circulates in the environment 4- Aeroponics is one of the aeroponic hydroponics. In this method, the distribution of water and essential elements to the roots of the plant is carried out by the micro-beetroot such as fogging and misetus (a type of water and nutrient solution). The advantage of this method is the proper ventilation of roots, in this method the roots grow in the air, this method is designed in a way that provides the possibility of proper use of water and essential elements. Roots in this method should be regularly exposed to nutrient solution.In most aeroponic systems at the end of the roots a small reservoir of water is placed that the roots always have access to water with. 

B) Tide systems (subsidence- flow) nutrient solution 

they used this kind of hydroponic growth systems for many years . However, today they are not economically used and are more used domestically and busyly. The composition of this structure is a neutral root environment such as gravule, sand and mineral poukes and growth containers with the same volumes of nutrient solution inside them and feeding pipes and hatches and pumps required. 

c) Drip systems, pots or bags/fountains of soluble minerals 

This hydroponic growth system is commonly used today, which is used commercially in plant cultivation in a bag or pot medium. The used holes create holes for perlite movement, as well as to allow additional water and nutrient solution to be removed from the environment and proper ventilation. Of course, some modifications have been made to this system to adapt to different products, for example vertical bags hanging for kahu or ganyani that are placed next to the bags. For example, the berry plant is placed in the holes next to the perlite bags, and the nutrient solution is flowed down from the top of the bags by the droplets of the holes or the gills installed. 

d) Direct drip system, Ykvel nutrient solution 

Today, Rakwol is more used in different regions of the world to produce tomatoes, pickles and peppers. Rockwoll is made of a neutral material made from a mixture of volcanic rocks, mixed with limestone and smelted up to 1,500 to 2,000 degrees Centigrade, releasing soft oliffs that wrap them together, then wrapping them into compressed plates and placing them inside the stone wool plates. The plates are uniformly placed on the same surface and also ways to pass the flow of nutrients and water should be considered and the nutrient solution is distributed by the droplet. 

Ship Techniques 

The hydroponic medium is surrounded by an outdoor environment that can also be pots or bags. Water includes additive fertilizers according to the atmospheric demand of the plant. In the systems where gravul and sand are available, a wash is needed by water to collect accumulated salts.