Abstract:Abstract. Effects of different years of Polyacrylamide (PAM) application on oat growth, soil microbial biomass and moisture content in semi-arid regions were studied through a field experiment from 2011 to 2015. The experiment consisted of total of 5 treatments and a control. These were: Conventional tillage (CK), (1) M1: PAM 2011, (2) M2: PAM 2011 and 2012, (3) M3: PAM 2011, 2012, (4) M4: PAM 2011, 2012, (4) M5: PAM 2011, 20122015and 2015. The results showed that with increasing PAM and the time interval, the… Show more
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