To determine the pH of the given soil samples

 

Experiment No. ____                          Date______

Aim: To determine the pH of the given soil samples

Principle: pH is the negative logarithm of the concentration of hydrogen ions in a solution. It can be determined using pH indicators.

Materials Required: Soil samples, weighing balance, test tubes, watch glass, distilled water, pH paper, pH chart

Procedure:

1.      Weigh 1 gm of the soil sample and put it in a test tube.

2.      Add 5 ml of distilled water in the test tube and shake the mixture.

3.      Allow it to settle for 5 minutes.

4.      Pour a few drops of the water from the upper layer into a clean watch glass.

5.      Dip a pH paper into this sample in the watch glass; and match the colour with the pH chart.

6.      Note the reading.

Observation Table:

Sr no.	Soil Sample	pH
1	Garden soil
2	Road side soil
3	Pond side soil

 

Result: pH of different soil types is different.

Hibiscus rosa-sinensis

 Experiment no.                             Date: ____________

 

Object: To describe the given flower in semi-botanical language

1.     China Rose / Shoe Flower

Botanical name: Hibiscus rosa-sinensis

Family: Malvaceae   

 

Floral Characters

Flower: Bracteate, bisexual, actinomorphic, hypogynous, red

Epicalyx: 3-8 bracteoles, separate, valvate, inferior, green  

Calyx: 5 sepals, gamosepalous, valvate, green, persistant

Corolla: 5 petals, polypetalous, twisted, clawed,

Androecium: Infinite stamens, monoadelphous, epipetalous, anther reniform, stamina tube around gynoecium

Gynoecium: Pentacarpellary, syncarpous, superior ovary, placentation axile, long style passing through stamina tube

Fruit: Capsule

Floral Formula:   Br

 

Family Identification

1.     Presence of mucus

2.     Kidney shaped anthers

3.     Presence of epicalyx

4.     Monoadelphous, infinite stamen

5.     Fruit capsule

 

      Classification

Division: Phanerogames

Subdivision: Angiospermy

Class: Dicotyledons

Subclass: Polypetalae

Category: Thalamiflorae

Order: Malvales    

Family: Malvaceae  

Wild Indigo Tephrosea purpurea

 Experiment no. 4               Date: ____________

Object: To describe the given flower in semi-botanical language

1.     Wild Indigo

Botanical name: Tephrosea purpurea

Family: Leguminosae or Fabaceae  

 Floral Characters

Flower: Bracteate, bisexual, zygomorphic, papillionaceous, pink or purple

Calyx: 5 sepals, gamosepalous, valvate, light green

Corolla: 5 petals, polypetalous, papillionaceous petals:outer long petal standard, two lateral petals wings and two lower boat-shaped petals keel, vexillary aestivation

Androecium: 10 stamens, diadelphous (9)+1, nine fuse to form tube near ovary, anther bilobed , introse  

Gynoecium: Monocarpellary, unilocular, superior ovary, placentation marginal, many ovules

Fruit: Legume pod

Floral Formula:    

 

Family Identification

1.     Flower zygpmorphic papillionaceous

2.     Diadelphous stamen

3.     Marginal placentation

4.     Inferior ovary

5.     Fruit legume

 

      Classification

Division: Phanerogames

Subdivision: Angiospermy

Class: Dicotyledons

Subclass: Polypetalae

Category: Calcaciflorae

Order: Rosales    

Family: Fabaceae

 

 

 

SPACE FOR DIAGRAMS

[Tephrosea purpurea]