一、现有耕作制度概况及其分析我区(禾刀)田耕作制度,大体分为以下几种轮作方式:①紫云英——中(禾刀);②小麦——中(禾刀);③紫云英(或油(艹才))——早(禾刀)——晚(禾刀);④久水田——中(禾刀)。上述四种轮作方式中,第三、第四两种面积较小。第一种紫云英与中(禾刀)轮作,好处是一年两作,既用田又养田,土(土上)肥力较高,粮食单产高而且(禾文),一般亩产七、八百斤;缺点是复种指数太低,年亩总产不高。第二 I. Overview of Existing Tillage Systems and Their Analysis The system of tillage in our district (Wo Wo) is broadly divided into the following modes of rotation: ①Varianthus - Zhong (Wo knife); ② wheat - Zhong (Wo knife) ; ③ Violet cloud (or oil (only)) - early (Wo knife) - late (Wo knife); long paddy field - in (Wo knife). Among the above four types of crop rotation modes, the third and the fourth two are smaller in area. The first type of Astragalus and the middle (Wo knife) rotation, the benefits are two crops a year, both field and Yang Tian, ​​soil (soil) higher fertility, high grain yield and (Wo Man), the general yield of seven , Eight pounds; disadvantage is that the multiple crop index is too low, the total output of mu is not high. second