Source: planning and Design Institute of agriculture, 2012As such, through the analysis of two models of converting the plant and apply the new cultivars showed the effectiveness of the new production model 2-3 times higher than the old mode of production. However, the conversion of the plant in the rich need to plant breeding, crop and especially consumption market. Need to crop growing options, to market to the economic efficiency of the tang model.Hai Phong city land useHai Phong city on 11 types of edaphic distribution located in 4 groups: groups of sandy soil, soil salinity, soil group and group of alluvial soil is alluvial and not compensation of the river. Based primarily on the characteristics and properties of these types of edaphic to determine potential fertility of them allows the development of a plant variety, high yield stability, taking into account the factors that affect the ability to provide soil nutrients for crops as drought in, flood, salty, alum ... land use layout as follows:-Rich alluvium: alluvium are not annual claims an area of 9826 ha, scattered distribution in An Lao district, Vinh Bao, Marine Resources, Switzerland on the rich higher terrain, suitable for growing rice, vegetables for higher productivity. Alluvial soil area 9.871 ha, distribution of scattered in Vinh Bao, Manilal, marine Security, First Resources ... on low terrain, drainage, hardly suitable for rice cultivation two service. Alluvial gold, red patchy floor has an area of 4546 hectares, distributed in the Vinh Bao, An Aging, Marine Resources on the high-rich terrain appropriate for 2 or enjoy the service fail and the rice crop; -Rich soil: soil covers an area of 5507 ha, distributed concentrated in Switzerland, An Opinion which has low topography, drainage basin, suitable for the cultivation of high-yield rice. Salty soil area 24688 hectares, distributed in all districts sunken low over the terrain adjacent to sea water or brackish saltwater, River, land suitable for rice cultivation, relatively high productivity but needs upgrading works to actively granted watering and fertilizing more lime to the soil;-Rich salt salty Land lot area: 4031 hectares, distributed in low terrain in the Swiss Plateau, and First District County Map paint, suitable for aquaculture or renovate to grow rice. The average and less salty salty soil area 10879 ha distribution concentrated in the districts of Vĩnh bảo, injection, Opinion, Raw, mostly Swiss suited to grow rice or color in many high, for many low need to perfect the work stop and water to wash the salty salty.
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