Biology Folio Form Four

3877 Words Mar 13th, 2011 16 Pages
TECHNOLOGY USED IN FOOD PRODUCTION

The efforts by Various Agencies to Diversity Food Production

ULAM

Ulam or vegetable salad consists of fresh leaves , fruits , and other plant parts which are eaten raw . Examples of ulam include :

pegaga ( Centella asiatica )

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shoots of papaya

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kacang botol

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petai ( Parkia speciosa )

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kemangi ( Ocimum sanctum )

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Ulam is rich in mineral ions , vitamins and fibre . some of these plants are used in the preparation of herbal medicines and drinks .

FACTS ABOUT pegaga , jering and pucuk kaduk !

Pegaga is now recognized by the World Health Organization (WHO) as an herb thought to generate intelligence in children than can help blood circulation and improve skin health .
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They are low in cholesterol . Examples of freshwater fish are :

Tilapia

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Jelawat

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Haruan

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Methods used to improve the quality and quantity of food production

DIRECT SEEDING

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Direct seeding spring cereal at Dewald's farm near Davenport , WA

Direct seeding is a method in which the seeds are shown directly into the soil by using special machines . The seeds are covered with soil as they are being sown . This method does not involve the transplanting of seedlings and therefore results in less damage to the roots of the seedlings . The plants achieve faster growth and this increases crop yield . Less water is also needed to irrigate the fields . This method is widely used in the planting of paddy to obtain higher yields of rice .

HYDROPHONIC

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Hydrophonics is a commercial technique for growing certain crop plants in culture solutions rather than soil . The roots of the plants are immersed in a solution which contains all the macronutrients and micronutrients in the correct proportions . The culture solution is aerated to provide sufficient oxygen for respiration .

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THE HYDROPHONIC METHOD
The nutrient solution is pumped into the container for a given period of time . The growing medium absorbs the nutrient solution , and the nutrient solution is then allowed to drain away .

THE NEW DESIGN OF HYDROPHONIC GARDEN

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AEROPONICS

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Aeroponics is a modified

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