Soy is a legume. Pods and seeds (beans) provide food for millions of people and have a major role in the preparation of chemicals. Soy is probably the result of domestication of wild plants in East Asia. Oil extracted from the seeds of soybean oil is one of the most important types. This oil contains linoleic acid is very high and therefore it can not be used for the preparation of frying oil.  In terms of the amino acid methionine than sesame soy seed is poor but is high in lysine in soybean more than any other grain into animal protein is similar. 49% linoleic acid and oleic acid soybean oil is 25%. Soybean protein is much higher than other oilseeds. These figures represent a major difference with other oilseeds are soybean oil and protein. Svya30-50 percent protein, Klza18-25 percent, 15-25 percent, sunflower, safflower, 15-25 percent, 19-25 percent sesame, groundnut is 25-35 percent
The oil Svya18-25 percent, Klza40-50 percent, Ftabgrdan25-50 percent, Glrng40-50 percent, Knjd25-45 percent, almond Zmyny45-65 percent.
As can be seen twice the amount of soy protein and oil content of oilseeds is also less common than other oilseeds. Too much protein has been extracted meal and oil, it is suitable for human nutrition. 
Products made from soybean 
Soybean Meal 
Soybean meal containing protein and little carbohydrate, which is obtained from grinding grain soybeans.
Nutrients contained in one cup of soy flour, 88 g fat :
290 calories - carbohydrates 34 grams - 41 grams of protein - calcium 212 mg - 1 g of fat - saturated 0 - P 593 milligrams - Cholesterol 0 mg - iron 8. 1 mg - Sodium 18 mg - Thiamin 0. 61 mm g - Potassium 2097 mg - Rybv Flavin 0. 22 mg - Dietary fiber 2 g - niacin 2. 3 mg - Vytyamy a 4 RE Vitamin C 0 mg
Botanical characteristics 
Soya Glycine max with the scientific name of a plant of the pea family (LEGUMES) is a shrub that grows strong and with horns on high G. Direct and high soybean root branching. But at the root of the soil at a depth of 30 cm distributed. Symbiotic bacterium Rhizobium japonicum on a soybean root can be seen. Rizzo bacteria biome, carbohydrates and other nutrients from the phloem and energy intake air into nitrogen into ammonium ions and then the amino acids. The amount of nitrogen that the plant is placed at the disposal of excess bacteria and nitrogen from the decomposition of dead tissue nodes (cut as a result of aging and the growth of secondary roots) has been released and is available for plants.  depth In stage 2, the soybean root, but the root, stem height is less than shoots. Until the seed formation, root growth continues and then stops before entering grain physiological maturity. Rhizobium japonicum naturally in soils of Iran and must be added to the soil bacteria along the seed. Soybean leaves usually fall out when you consider that this is a desirable attribute for removal.  Soybean is two and indeterminate form. In plants with a limited form of flowers at the beginning of the emerging upper node and continue downward. Unlimited growth in the number of nodes in the lower flowering has begun and goes upwards. Unlimited growth in soybean forms the largest gas plant in the middle and the upper and lower parts of the plant from leaf and petiole length decreased. The limited growth figures lower part of the leaf of the plant with lower leaves and petioles are shorter, but closing down the plant, on the surface and during dumpers G·ha G increases. Limited growth in soybean cultivars with seeds that are produced in the lower part of the seed plants in the upper part of the plant that are produced are smaller. Arrangement of flowers on the plant could affect the performance figures of the fallen leaves perpendicular to the figures of the higher efficiency of photosynthesis is deferens. Soybean pod in the distance is the soil surface, equally mechanized harvest will be more comfortable and pods left on the plant would be minimal. Of first pod of the plant and the soil surface is often a function of genotype and density and high density pod is formed above the soil surface. The number of branches in late soybean cultivars was high and vice versa, in the early cultivars and their number is lower. With the increase of branches per plant, grain yield will increase. On the other hand there is a positive correlation between the maturity of the product and plant height. The dwarf varieties of early and late varieties are more tall. Bean oil is self pollination and cross pollination-dependent adult activity does not exceed 1%.  soybean 60 to 200 grams and with a mean weight of 150 grams (different soybean cultivars have different size seeds such as Clark Hill coarse and fine varieties), and the oil is stored in proteins in the cotyledons. 
Compatibility soybean 
Soybean breeding activities leading to the production of different varieties of the growth period, which makes it different latitudes and at different heights above sea level planting. Though soybean plant short day, but many other numbers are not sensitive to day length. Bean oil per day and the early results of 13 groups of 000, 00,0, I, II, III, IV, V, VI, VII, VIII, IX and X, respectively. 000 and 00 canola varieties indifferent to day very early and very sensitive group X is during the day and late. Group V to VIII are limited in growth habit and groups of 00 to IV are indeterminate. Unlimited number of branches in high growth figures and lower maturity Yknvakhtgy of limited growth.
Clark figures 63, Williams and steel group, with unlimited growth. In Iran, more than figures like Harkv and Steel Group II to Group III as early varieties such as Williams, Clark 63 and World of Warcraft as the clay figures like Lee and Hill Group V is used as of late. The most sensitive of late soybean crop during the day.
remains very high and the temperature will not disappear although it does not produce a good performance. Minimum temperature for growing soya lethal temperature is 10 ° C and at 2. Temperatures higher than 35 degrees during the growing period is not suitable for it and the seeds that are produced at high temperatures are not good quality. Soybean is sensitive to drought and seed germination stage sensitive to standing water Bashdalbth allergic to soy Nyby air humidity (dry air) does not. 
Bean oil mild cold in seedling stage and maturity stage (a little more than corn), and more. Rainfed bean oil in areas with an annual rainfall of 1000 mm is possible (such as northern Iran). The plant is resistant to wind. Soybean and soil salinity is very sensitive element.
The high concentration of CO2 has increased nitrogen fixation. In general, the concentration of atmospheric CO2 is ppm320 but projections show that by 2050 the ppm600 increase the concentration.The high concentration of CO2 has grown stronger roots than conventional seeds were produced.  factors affecting nitrogen fixation in soybean 1-temperature: soy as a tropical plant symbiotic bacteria activity temperature between 25 and 30 ° C C needs. When soil temperatures fall below this level, decreases the formation of nodules on soybean and at 10 ° C formed node is disrupted.
2-nitrogen soil: nodulation in soybean is inhibited by high nitrate studies have shown that further delay in the formation of nitrate than ammonium and urea intermediate node is obtained.
3. Access to Water: Access to water is a major effect on the formation of nodules and nitrogen fixation, nodulation by increasing soil water content increased when flooding occurs. Water stress significantly reduces the number of filaments composed of transmission and prevent nodulation.
4. The high concentration of salts in high concentrations of salt in the water node negative node decreases due to osmotic inhibition.
5. The low acidity: pH and acidity reduces nodulation usually less than 6 Ryzvybvm activity is reduced nodulation. If we cultivated soil pH is less than that of the ancient lime to raise soil pH to the proper activity and the toxicity of aluminum and manganese bacteria in acid soils prevented.
6-increasing CO2: Research has shown that increasing CO2 also increases nitrogen fixation. It is because of increasing CO2 increases photosynthesis in the bacteria is more glucose. Bacteria that are on the plant instead of the plant components are needed
7. agronomic factors: Factors such as the burning of fields, standing water, solid crust and drought have reduced bacterial activity.
8-compaction of soil: Soil compaction reduces root growth, and growth is nitrogen nodules. Leverage soybean root of a negative relationship with soil compaction and soil compaction reduces the weight and number of nodules is established.
9-feeding: Lack of elements such as cobalt, calcium, magnesium, phosphorus, molybdenum and iron is reduced or non-formation of soybean bacterial nodes. Heavy metals such as cadmium can cause loss of bacterial nodes
10. Pests and diseases: the nodes may have some level of virus activity directly affects the node. Root nodes may be eaten by insects or insect larvae.