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REAPING GOLD FROM SOIL | STD 7

Updated: May 14, 2021

Here we present Unit 1, Science subject of STD 7. It mainly deals with the necessity of farming, agro processing & green methodology.


Layering is effective in plants like jasmine (pichi, mulla), rose, hibiscus, cashew and sapota.





What are the factors to get more yield ?

  • Fertile soil

  • Suitable place

  • Favorable climate

  • Quality seeds

  • Planting materials

  • Pest control

  • Proper watering

  • Proper manuring

  • Weed control



What are the qualities essential for a plant from which seeds are collected ?

  • Plants with high yield

  • Disease free plants

  • Fruits formed in the mid-span


What are the classification on the formation of plants?

There are two process for the formation of plants

1.Sexual reproduction

2.Vegetative propagation


What is sexual Reproduction? Give some examples

The formation of seedlings from seeds is by sexual reproduction.

Eg: Tomato, Brinjal, Paddy, Green Chilly


What is vegetative propagation? Give examples

The formation of new plantlets from parts like root, stem and leaf is called vegetative propagation.

Eg: Rose, Hibiscus, Tapioca, Curry leaves, Drumstick


1. Layering

  • Most of the plants can be grown this way.

  • Plants formed from layering do not have as much life span as plants formed from seed germination.

  • They will be of smaller size too.

  • They have qualities of the parent plant.

  • If layering is done on diseased plants, new plantlets will also be infected.




Layering is also done on branches that grow close to the soil, by bending the middle of the branch into the soil






WHAT ARE THE PROCEDURE OF LAYERING ?


STEP: 1

  • Select a branch of the plant from the main stem.

  • The branch must be pencil thick.

  • Peel off one centimeter of bark from the stem in a circular shape.

STEP : 2

  • Cover the peeled off part with a slightly moistened mixture of coconut fibre, soil and sawdust.

  • Cover it with a polythene sheet.

  • Tie both ends with jute twine

  • Wet it with enough water to retain moisture.


STEP : 3

  • Numerous roots will sprout within two months.

  • Cut the branch and plant it in a pot, till it is ready to be transplanted in the soil.


STEP : 4

  • Plant the sapling in a suitable place.

  • Layering is effective in plants like jasmine (pichi, mulla), rose, hibiscus, cashew and sapota.


Important information related to layering

  • Most of the plants can be grown this way.

  • Plants formed from layering do not have as much life span as plants formed from seed germination.

  • They will be of smaller size too.

  • They have qualities of the parent plant.

  • If layering is done on diseased plants, new plantlets will also be infected.

  • Flowering and fruiting of such plants are faster than those in plants formed from seeds.

  • Through this method, we can produce more saplings within a short period.

  • Layered plants do not possess the taproot system.

  • They require more care.

Merits & Demerits of Layering


MERITS

  1. Most of the plants can be grown this way.

  2. They have qualities of the parent plant.

  3. Flowering and fruiting of such plants are faster than those in plants formed from seeds.

  4. Through this method, we can produce more saplings within a short period.

DEMERITS

  1. Plants formed from layering do not have as much life span as plants formed from seed germination

  2. They will be of smaller size too.

  3. If layering is done on diseased plants, new plantlets will also be infected.


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