dialectics

continued. Insufficient v e n t i l a t i o n caused rot. W e set
about e x p e r i m e n t i n g a n d collecting data. A t t h e beginn
i n g of t h e storage period, t h e e n d of N o v e m b e r , w h e n
t h e relatively h i g h t e m p e r a t u r e caused rot, w e t u r n e d
t h e cabbages o f t e n a n d opened t h e door to l o w e r t h e
t e m p e r a t u r e of t h e storage cellar. A t t h e m i d d l e of t h e
storage period, i n freezing weather, t h e lowest t e m p e r a ­
t u r e w o u l d freeze t h e m , so w e ventilated a n d t u r n e d
t h e m d u r i n g t h e w a r m e s t part of t h e day so as to keep
t h e t e m p e r a t u r e a r o u n d zero. A t t h e end of t h e storage
period, after t h e cabbages h a d been k e p t f o r a long t i m e ,
a n d as t h e t e m p e r a t u r e i n t h e storage cellar gradually
rose, t h e y sprouted readily. T h e n w e k e p t t h e t e m p e r a ­
t u r e d o w n . W e also used a chemical to p r e v e n t t h e m
f r o m sprouting. I n this w a y w e reduced t h e damage.
C h a i r m a n M a o says: "Processes change, old processes
and old contradictions disappear, new processes and new
contradictions emerge, and the methods of resolving contradictions
differ accordingly." A f t e r solving t h e p r i m a r y
p r o b l e m of rot, t h e secondary p r o b l e m , t h a t of leaf shedding,
became t h e principal contradiction. W e again used
chemical t r e a t m e n t a n d solved this contradiction, b u t w e
noticed t h a t t h e cabbages treated w i t h t h e chemical w e r e
easily damaged. A n a l y s i s s h o w e d t h a t t h e chemical i n ­
creased t h e i r ability to h o l d water. T h e treated cabbages
w e r e fresh b u t delicate, so t h a t damage a n d resulting
c o n t a m i n a t i o n w e r e apt to occur. T h e old w a y s of t u r n ­
ing, piling u p a n d v e n t i l a t i n g w o u l d n o t do f o r chemicallytreated
cabbage. W e adjusted t h e a m o u n t of t h e chemical,
and changed t h e w a y of p i l i n g u p a n d t h e t u r n i n g t i m e ,
according t o t h e l e n g t h of storage t i m e . T h e result w a s
that r o t w a s decreased, preserving t i m e considerably
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