微生物生态学 研究处于环境中的微生物,和与微生 物生命活动相关的物理、化学和生物等 环境条件,以及它们之间的相互关系的 科学

HOME BACK FORWARD! PRINT SEARCH EXI INTRODUCTION Major soils of the world ORGANIC SOILS Mineral soils World Reference base for soil resources: atlas

Section 1 The chemical and mineral constitutes of soil parent minerals The chemical constitutes of soil parent minerals

Section 1 The types of soil water and measuring soil moisture a

Section 1 Soil colloidal surface nature Surface types of the soil colloid (一) Siloxane surface (二) Hydrous oxide surface (三)Organic matter surface

Section 1 Soil air 一、 Composition of soil air Compare soil air with atmosphere( Volume % Atmosphere

一、根部病害 1 烟草黑胫病

一,花生病害 1 黑斑病

一、棉花立枯病 二、棉花炭疽病

一、小发叶部病害 小麦条锈病