1 . surface tillage
表土耕作(surface tillage)或稱次級耕作 ( secondary tillage),是配合基本耕作措施使用的入土較淺、作用強(qiáng)度較小,旨在破碎土塊、平整土地、消滅雜草的一類土壤耕作措施.
1 . the surface soil
normally , the extracting soil areas firstly need to temporally store the surface soil, meanwhile , temporary block measures , temporary drainage projects and temporary cover should be taken .粘土料場首先進(jìn)行表土的臨時堆存,同時布設(shè)臨時堆土區(qū)臨時攔擋、臨時排水和臨時覆蓋等措施。
2 . of topsoil
the results show that due to disturbance of tourism in urban parks , the soil density inereases ; and physical clay ( & lt ; 0.01mm ) , organic matter and total nitrogen of topsoildecrease .結(jié)果表明,由于旅游干擾,城市公園森林土壤的容重增加,而表土的物理性黏粒(<0.01mm)、有機(jī)質(zhì)和總氮含量降低。