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必修4《Using LanguageⅡ》PPT课件优质课下载
Skim
What important methods does the text mention?
to keep seeds
to get rid of weeds
to turn over the soil
to plant crops
how
Paragraph 3
His advice was to ,
then to ;
when planted, the seeds should be .
choose seed-heads with the best color
hang them up to dry all winter
knocked out of their seed-heads
Farmers could either or
.
let animals eat the weeds
cover them by turning the soil over
The autumn ploughing should be , but the spring ploughing should be .
deep
less deep
He suggested annually and next to each other in the field.
changing crops
growing different plants
Qi Min Yao Shu is considered as