Based on 17 years field experiments,the effects of long-term located application of chemical fertilizer on soil physical properties were studied in cultivated slope lands in the hilly Loess Plateau of China.The results indicate that: under the condition of long-term chemical fertilization,soil physical properties in the surface layer(0—15 cm)do not show a trend of degradation,and those in the middle layer(15—30 cm)and lower layer(30—45 cm) are improved in different degrees.The influence of chemical fertiliz...
修改评论