《Table 3 Changes in classification factors of project areas after land consolidation》

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《Site Selection of Land Consolidation Project Based on Farmland Quality Evaluation in Yanjin County of Henan Province》

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Through field surveys and soil sample collection tests，we obtained changes in classification factors of project areas after the construction of land consolidation projects（Table 3）.From Table 3，after the implementation of the project，the probability of irrigation，drainage condition and profile pattern showed the largest changes，and there was basically no change in other factors.Reasons are as follows.（i）Through the construction of farmland water conservancy projects，it increased the probability of irrigation of some project areas（mainly Yulin area）.Under the condition that the water source is guaranteed，the lower the original probability of irrigation，the more significant improvement effect it had after the implementation of the project.（ii）Through building and improving the drainage system，it improved the field drainage conditions and increased the score of drainage conditions in most areas.（iii）Through the land consolidation and backfilling projects，it improved the profile pattern of some farmland and slightly increased the score.In addition，the topsoil texture，soil organic matter content，soil p H and salinization degree are inherent features of soil，they would have small changes only under some certain conditions in a long term，thus they are basically not subject to the construction of projects.