For determination of physical and chemical properties of soil, sampling is one of the major steps. Meticulous attention should be paid for collecting an adequate amount of soil needed for analysis. Soil samples are collected from selected sites (at different depths), after removing the surface debris, in polythene bags and then suitably labelled for future recording. Physical Characteristics of Soil: [...]
In this article we will discuss about:- 1. Meaning of Plant Growth Regulators (PGRs) 2. Characteristics of Plant Growth Regulators 3. Functions 4. Discovery. Meaning of Plant Growth Regulators (PGRs): Plants produce some specific chemical substances, which are capable of moving from one organ to the other, and provide physiological control on growth. These substances, which are active in very [...]
The following points highlight the two main types of movements exhibited by plant organs. The types are: 1. Growth Movements 2. Turgor Movements. Movement by Plant Organs: Type # 1. Growth Movements: Growth movements are divided into three sub-groups: (a) Tropic movements occur in response to always related to the direction of the stimulus. (b) Nastic movements in which the [...]