The ozone has the oxidizing power which is powerful the fluorine and the antimicrobial spectrum of wide scope. Researches were carried out to use the merits that ozone has in various fields including the food industry, and many studies are also conducted nowadays for more efficient use of ozone. The ozone was permitted legally as a food additive and was practically used in the United States, Australia, Japanese etc. In November 2007, ozone water was permitted as a food additive in Korea and the interest in the use of ozone water has been on the rise in the Korea's food industry. As a olisinfectant method, ozone has many advantages. The maintenance and management expenses of ozone are lower than the installation cost at early stages and no by-products are generated after use it compared to others. Recently the demand of ozone as a olisinfectant method is increasing drastically. Although ozone water is popularly used to sterilize raw foods like fruits, vegetables and meats, the cases are still limited and were verified by the survey results. However, the use of ozone water is gradually being increased and is focused on food services. Ozone water refers to a state where ozone is dissolved into water to more conveniently use ozone. Accordingly, ozone water should be managed in regards with the amount and time of water-dissolved ozone, and the control of discharged ozone concentration is required for safe use of ozone water. The items to control mentioned above are directly related to the performance of the devices, and therefore, it is required to newly establish the performance criteria of ozone water manufacturing devices.

This report covers the first visit by the NRI team to Ghana in the start-up of the agronomy component of the Integrated Food Crops Systems Project (IFCSP). The team was fully supported by in-country IFCSP personnel, VSO (Ms Meijer) and other collaborators. The purpose of the visit was to establish the project on the ground following funding approval from the NRSP FAI programme. This involved defining the activities of the various collaborators and conducting a participatory rural appraisal of farmers' perceptions and practices for maintaining soil fertility in dry season vegetable producing areas of Brong Ahafo region. The PRA which was carried out in four typical vegetable growing areas revealed that farmers use considerable amounts of inorganic fertilisers but are concerned about their costs and that increased quantities are required to maintain yields at former levels. Many farmers practice fallowing to maintain soil fertility and to avoid pest build-up, but generally fallow periods are becoming shorter. The project aims to overcome these constraints through the introduction and testing of suitable legume cover crops and green manures. A strategy for introducing the concept of cover crop and green manure usage and testing was developed for each of the four study locales following completion of the PRA. Strategies are related to the soil type(s) present, water availability and husbandry practices employed. Arrangements were made with SRI to conduct an initial soil survey and analysis of two surveyed areas before the start of the rains in April. Funding for the survey will be provided from the newly opened project account in Sunyani. Arrangements were made to purchase seed of suitable cover crops from CRI and seeds of those not available were ordered from European suppliers. Agreement for importing new accessions were made with the Plant Protection and Regulatory Services Department (Accra) and the Plant Genetic Resources Centre, at Bunso.