Extension of using the green manure plant (sunn. hemp) in saline soils
Due to the fact that chemical fertilizers are currently expensive, farmers cannot afford to buy them sufficiently to meet the demand of plants. There is also shortage of materials to make compost. Therefore, green manure crops are materials for saline soil amendment suitably to increase organic matter and nitrogen to soil. This is because they are cheap when compared with using other types of organic matter. There are no residues. This aspect is good to the environment. Green manure is plant grown to be chopped and covered up into the soil in improving the soil in order to increase plant yields. This method can help release nitrogen to planted crops. This approach is pretty much focused on currently in the age of high costs. It is considered as an important method which makes people become aware of importance of reducing costs of production in improving soil qualities to increase plant yields. Moreover, this approach helps reduce soil salinity indirectly. In other words, soil properties are improved in terms of the fact that the soil becomes more friable. As a result, salt on the ground is washed off to the soil at the bottom more easily. There has been gathering of farmers in the area of Ban Kok Phrom , Non Thai sub-district, Non Thai district, Nakhon Ratchasima province and areas of sub-districts nearby because most farmers have an occupation of conducting rice farming mainly. Soil has low fertility due to problems regarding degradation of soils having been used for planting industrial crops for a long time. Therefore, this requires soil amendment in terms of physical, chemical and biological structures. Therefore, the outreach is to make farmers in the area know the benefits from plowing up and over to cover green manure plants, to demonstrate how to plough up and over to cover green manure plants correctly and suitably so that farmers can rely on themselves and can apply the knowledge in developing land in their own areas.
Initially, there were applicants applying to be members of the group accounting for 50 people. There is an operation committee consisting of 9 people. The establishment of the group replacing agricultural chemicals with organic substances. Strong Farmers Extension Group in the project of promoting organic substances use replacing agricultural chemicals.