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１范围本标准规定了河北省大白菜周年高产栽培的生产基础条件和主要栽培技术要点。本标准适于用河北省北纬４２度以南地区。２产量指标春季大白菜３０００ ～５０００ ／６６７ ;夏季大白菜２５００ ～４０００ ／６６７ ;秋季大白菜５０００ ～６０００ ／６６７ 。?
1 Scope This standard specifies the basic conditions for annual production of annual high yield cabbages and major cultivation techniques in Hebei Province. This standard is suitable for use with 42 degrees north latitude in Hebei Province. 2 Yield Index Spring cabbage 3000 ~ 5000/667; Summer Chinese cabbage 2500 ~ 4000/667; Fall Chinese cabbage 5000 ~ 6000/667. ?