1. This video is Session 3 part 3 of our ongoing training on "Introduction to Soil Science." This training gives a broad overview and introduction to some basic soil characteristics: phases (solid, liquid, gas), texture, density, structure, reaction (pH), plant-water relationships, organic matter,...
  2. 俗话说“你不知道你有一个问题你就不可能解决问题”,这是诊断植物营养缺乏基础科学的支撑。多年来,很多农民和科学家一起工作,通过多种线索来判断农作物的营养缺乏。这些线索和症状十分有用,特别是在土壤和植物组织试验做不了或行不通时。