What is Tillage? • The practice of keeping the soil mellow (soft) and free from weeds mechanically (physically) • Can be seedbed preparation or post-emergence cultivation 土壤耕作，就是通过机械的物理作用，调节土壤 松劲度、土壤表面状态和耕层内部土壤的位置，创造 适宜作物生长的土壤水、肥、气、热状况的技术措施。 土壤耕作措施的特点：一种措施可以同时起几种 作用；一项任务可以由几种措施来完成
What is Tillage? • The practice of keeping the soil mellow (soft) and free from weeds mechanically (physically) • Can be seedbed preparation or post-emergence cultivation 土壤耕作，就是通过机械的物理作用，调节土壤 松劲度、土壤表面状态和耕层内部土壤的位置，创造 适宜作物生长的土壤水、肥、气、热状况的技术措施。 土壤耕作措施的特点：一种措施可以同时起几种 作用；一项任务可以由几种措施来完成
What are the purposes of tillage? 土壤耕作的目的 • 调节耕层三相比，创造深厚的耕层和适宜的苗床 To adjust the water-air-solid proportion in topsoil；Creating deep tilth and suitable seed bed. • 除灭杂草 To kill weeds. • 翻转耕层，翻埋残茬和肥料 To bury crop stubbles and fertilizers. 改变土壤耕层构造和地面状况，调节土壤水、 肥、气、热因素，翻埋 根茬和肥料，清除田间杂草， 控制土传病害，调节土壤微生物区系，为作物播种、 出苗和生长发育提供适宜的土壤环境
What are the purposes of tillage? 土壤耕作的目的 • 调节耕层三相比，创造深厚的耕层和适宜的苗床 To adjust the water-air-solid proportion in topsoil；Creating deep tilth and suitable seed bed. • 除灭杂草 To kill weeds. • 翻转耕层，翻埋残茬和肥料 To bury crop stubbles and fertilizers. 改变土壤耕层构造和地面状况，调节土壤水、 肥、气、热因素，翻埋 根茬和肥料，清除田间杂草， 控制土传病害，调节土壤微生物区系，为作物播种、 出苗和生长发育提供适宜的土壤环境
What is Soil Tilth? 什么是耕层 指耕作措施经常作用的土层，也是作物根 系分布最密集的层次。 – The physical condition of the soil – fitness for cultivation
What is Soil Tilth? 什么是耕层 指耕作措施经常作用的土层，也是作物根 系分布最密集的层次。 – The physical condition of the soil – fitness for cultivation
How is good soil tilth developed? 如何创造适宜的耕层 适时、适法、 适度耕作 till at proper time, proper method and proper frequency to maintain proper aggregation. • Too wet during tillage makes soil lumpy, too dry during tillage makes soil too fine and likely to blow; • Over tillage will destroy soil structure and lead to soil compaction
How is good soil tilth developed? 如何创造适宜的耕层 适时、适法、 适度耕作 till at proper time, proper method and proper frequency to maintain proper aggregation. • Too wet during tillage makes soil lumpy, too dry during tillage makes soil too fine and likely to blow; • Over tillage will destroy soil structure and lead to soil compaction
What is a seedbed? 什么是苗床 种子萌发和幼苗汲取营养之所在。 Place where seeds germinate & nourish young plants
What is a seedbed? 什么是苗床 种子萌发和幼苗汲取营养之所在。 Place where seeds germinate & nourish young plants