土壤培肥 meaning in Chinese

improvement of soil fertility

Study on technical experiment of soil fertilization in newly - terraced fields
新修农田土壤培肥技术试验研究
Effects of increasing soil fertility and maize output by manure the maizestraw with different returning ways to upland soil
不同秸秆还土方式对旱地土壤培肥和玉米产量的影响
Appraisal of natural resources for agriculture , water and soil conservation , comprehensive system of improvement of irrigation , drainage and soil furtility , allocation of natural resources and plan in their utilization
农业自然资源评价，水土保持，灌溉排水和土壤培肥等综合治理体系，农业自然资源利用的配置，开发利用规划等。