(IP 
  (NP-SBJ 
    (-NONE- *pro*))
                    
  (VP 
    (ADVP 
      (AD 现))
                    
    (ADVP 
      (AD 已))
                    
    (VP 
      (VE 有)
                    
      (NP-OBJ 
        (QP 
          (CD 三亿)
                    
          (CLP 
            (M 亩)))
                    
        (CP 
          (WHNP-2 
            (-NONE- *OP*))
                    
          (IP 
            (NP-SBJ 
              (-NONE- *T*-2))
                    
            (VP 
              (ADVP 
                (AD 严重))
                    
              (VP 
                (VV 缺)
                    
                (NP-OBJ 
                  (NN 钾))))))
                    
        (NP 
          (NN 农田))))))
arg0: 
                    *T*-2 
                
arg1: 
                    钾 
                
argm: 
                    严重