一、马铃薯病害

一、小发叶部病害 小麦条锈病

一、大丽花病毒病

一、棉花立枯病 二、棉花炭疽病

一.叶部病害 1 玉米大斑病

一,花生病害 1 黑斑病

一、苹果病害 1 炭疽病

一、根部病害 1 烟草黑胫病

一、水稻叶部病害 1 稻瘟病

Sectionl Concept of soil tillage and basic manipulation Concept of soil tillage Tillage- The mechanical manipulation of the soil profile for any purpose. Soil tillage-oldest procedure of agriculture to manipulate the soil to improve crop production. Farmers of West Africa preparing their land for planting