Section 1 Soil three phases Constitution Soil density and bulk density (- Soil density (or Particle density Soil density is the density of the solid soil particles only; the measurement does not include water weight or pore(air)space. The dominant soil minerals- quartz, feldspars, micas, and clay minerals

一.为什么要了解土壤有机质? 二土壤有机质是什么?有多少? 三.土壤中有机质如何转化? 四.土壤腐殖质如何存在? 五.土壤腐殖质有什么作用?如何更好地发挥这种作用?

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

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

Introduction to soil science By Genxing pan Department of Soil Science, Inst Resources, Ecosystem Environment of Agriculture(Ireea) www.ireea.kyig.njau.edu.cn

填空 1.离断精索除去睾丸的方法有 2.小公猪阉割术时采用 侧卧保定,小母猪阉割术时采用_ 侧固 保定

名次解释 1.外科感染2.脓肿3.蜂窝织炎4.败血症 分析与综合 1.制定脓肿的治方案 2.制定蜂窝织炎的治方案?

名次解释 1.消毒2.麻醉3.组织分离4绷带 填空. 1.手术器械消毒灭菌方法有 2.临床上用的酒精棉球、碘酊棉球是用%的酒精、%碘酊制成的

1.动物中毒后,一般应采取哪些治疗措施? 2.常用的沈富剂有哪些?答样选挪 3.亚硝酸盐中毒和氢佩球序、毒疾数上有哪些异同?分别应怎样抢救?

名词解释: 1.食道阻寨、2.硬嗉病、3.前胃弛缓、4.宿草不转、5.瘤胃酸中毒、6.肠 秘结、7.风气疝、8.胃肠炎、9.百叶子、10.皱冒变位