OILSEEDS

ECONOMIC IMPORTANCE OF OILSEEDSMAJOR OILSEEDS GROWN IN INDIAGEOGRAPHICAL REQUIREMENTS OF THE MAJOR OILSEEDSAREAS OF PRODUCTIONMETHOD OF CULTIVATION

INTRODUCTION TO OILSEEDS

VERY IMPORTANT COMMERCIAL CROPS IN INDIA.

INDIA IS THE LEADING OILSEEDS PRODUCER IN THE WORLD.

PRODUCTION HOWEVER IS FALLING SHORT LEADING TO IMPORTING OILSEEDS.

ECONOMIC IMPORTANCE OF OILSEEDS

THE OIL EXTRACTED FROM OILSEEDS FORMS AN IMPORTANT ITEM OF OUR DIET.

EXTRACTED OIL IS USED AS RAW MATERIAL FOR MANUFACTURING PAINTS, VARNISHES, SOAPS, PERFUMES, LUBRICANTS, etc.

OIL CAKE IS A BY-PRODUCT OBTAINED AFTER THE EXTRACTION OF OIL FROM OILSEEDS AND IS AN EXCELLENT CATTLE FEED.

OIL CAKES ARE ALSO USED AS FERTILIZERS.

MAJOR OILSEEDS GROWN IN INDIA

GROUNDNUT SESAMUM RAPESEED MUSTARD LINSEED CASTOR

GROUNDNUT INDIA IS THE LARGEST PRODUCER OF GROUNDNUT

IN THE WORLD. IT IS A TROPICAL CROP HENCE GROWS WELL OVER

THE PENINSULAR PLATEAU. GROUNDNUT ALSO KNOWN AS PEANUT OR

MONKEYNUT. GROUNDNUT KERNELS ARE RICH IN PROTIENS AND

VITAMINS. USED FOR MANUFACTURE OF EDIBLE OIL. USED IN MANUFACTURE OF SOAP, CANDLES,

ARTIFICIAL LEATHER. USED AS AN IMPORTANT ROTATION CROP AS IT

HELPS IN INCREASING SOIL FERTILITY.

GEOGRAPHICAL REQUIREMENTS OF GROUNDNUT

TEMPERATURE : BETWEEN 22 TO 28 DEGREE CELSIUS.

RAINFALL : IS A DROUGHT RESISTANT CROP HENCE CAN GROW IN AREAS WITH LESS RAINFALL WELL DISTRIBUTED DURING THE FLOWERING STAGE.

SOIL : LIGHT SANDY SOIL, RED SOIL, BLACK SOIL. IS A LEGUMINOUS VARIETY CULTIVATED AS BOTH

KHARIF AND RABI CROP

METHODS OF CULTIVATION

SOWING : SOWN USUALLY BETWEEN JUNE AND JULY. WHEN

THE FLOWERS APPEAR,THE STALKS BEND DOWNWARDS AND FORCE THE SEEDPODS INTO THE GROUND WHERE THEY MATURE.

HARVESTING : BETWEEN OCTOBER AND DECEMBER. WARM DRY SEASON ESSENTIAL FOR RIPENING. PODS ARE STRIPPED FROM THE VINES AND

DRIED IN THE SUN.

AREAS OF PRODUCTION

GUJRAT –LEADING PRODUCER TAMIL NADU ANDHRA PRADESH KARNATAKA

MUSTARD OR RAI AND RAPESEED OR SARSON ARE RABI CROPS GROWN IN ROTATION WITH

WHEAT. GEOGRAPHICAL REQUIREMENTS – SAME AS FOR WHEAT CROP. ARE PLANTED WITH WHEAT AND HARVESTED A

LITTLE BEFORE WHEAT WHEN THE CROP TURNS YELLOW.

TEMPERATURE = ARE WINTER CROPS AND GROW WELL IN TEMPERATURE RANGING BETWEEN 10 TO 20 DEGREE CELSIUS.

RAINFALL = BETWEEN 50 TO 100 cm IS ADEQUATE.

SOIL = GROW WELL IN ALLUVIAL SOIL.

IMPORTANCE OF MUSTARD

USED AS COOKING MEDIUM IN NORTH INDIA.

USED IN FLAVOURING PICKLES. TENDER LEAVES USED AS

GREEN VEGETABLE/ SAAG OIL CAKE IS USED AS CATTLE

FEED.

AREAS OF MUSTARD PRODUCTION

RAJASTHANHARYANAUTTAR PRADESHPUNJABASSAMWEST BENGALBIHARORISSAMAHARASHTRA

SESAMUM

GROWN IN ROTATION WITH OTHER CROPS LIKE JOWAR OR RAGI

ALSO KNOWN AS TIL OR GINGELLY. USED AS COOKING OIL. USED FOR MEDICINAL PURPOSES. IS EATEN RAW,ROASTED OR MIXED WITH

JAGGERY / GUR OR SUGAR AS THESE ARE RICH SOURCES OF PROTIEN, CARBOHYDRATE AND MINERALS.

GEOGRAPHICAL REQUIREMENTS OF SESAMUM / SESAME

GROWN AS BOTH KHARIF AND RABI CROP. TEMPERATURE = 21 TO 23 DEGREE CELSIUS RAINFALL = 40 TO 50 cm SUFFICIENT/

CANNOT WITHSTAND DROUGHT OR HEAVY RAIN.

SOIL = WELL DRAINED LOAMY AND BLACK COTTON SOIL.

METHOD OF CULTIVATION - SESAMUM

PLANTS GROW TO A HEIGHT OF 0.5 TO 1.5 METRES.

ARE READY FOR HARVEST WHEN THEY TURN YELLOW IN ABOUT 3 TO 4 MONTHS.

AREAS OF PRODUCTION = RAJASTHAN, GUJRAT, ANDHRA

PRADESH

LINSEED OBTAINED FROM A FIBRE PLANT KNOWN AS FLAX. FLAX WAS GROWN WIDELY IN THE COOL TEMPERATE

REGIONS OF EUROPE AND WAS TRADITIONALLY USED FOR CLOTHING AND HOUSEHOLD LINEN.

LINSEED OIL IS UNSUITABLE FOR HUMAN CONSUMPTION.

USES OF LINSEED =

HAS A UNIQUE DRYING PROPERTY AND IS USED FOR PAINTS, VARNISHES, PRINTING INK, LINOLEUM, WATER PROOF FABRICS.

LINSEED OILCAKES ARE USED AS CATTLE FEED.

GEOGRAPHICAL REQUIREMENTS OF LINSEED IS GROWN AS A RABI CROP. TEMPERATURE = NEEDS COOL , MOIST CLIMATE

WITH TEMPERATURE BETWEEN 10 TO 20 DEGREE CELSIUS.

RAINFALL = 50 TO 75 cm SOIL = BEST GROWN ON CLAYEY LOAMY SOIL

AND BLACK COTTON SOIL OF THE PENINSULAR PLATEAU AND ALLUVIAL SOIL OF NORTHERN PLAINS OF INDIA.

AREAS OF PRODUCTION = MADHYA PRADESH, UTTAR PRADESH,

MAHARASHTRA.

Castor seed

India is the second largest producer of castor seed.

THE PLANT AND ITS SEED ARE NOT FIT FOR HUMAN CONSUMPTION.

THE OIL IS USED IN PAINTS, VARNISHES, PRINTING INKS, LINOLEUM, TRANSPARENT PAPER, SOAPS, PLASTICS.

CASTOR OIL IS USED AS AN EXCELLENT LUBRICANT FOR HIGH SPEED ENGINES AND AIRPLANES.

GEOGRAPHICAL REQUIREMENTS OF CASTOR SEED

IS A TROPICAL PLANT AND GROWS AS KHARIF AS WELL AS RABI CROP.

TEMPERATURE = BETWEEN 20 TO 23 DEGREE CELSIUS. FROST IS HARMFUL .

RAINFALL = TOLERANT TO DROUGHT / 50 TO 75 cm OF RAINFALL IS ADEQUATE.

SOIL = GROWS BEST IN DEEP LOAMY SOIL AND LIGHT ALLUVIAL SOIL.

AREAS OF PRODUCTION =

ANDHRA PRADESH, GUJRAT, RAJASTHAN, ORISSA.

COTTON SEEDS IS PRODUCED WHERE COTTON IS CULTIVATED AS

IT IS A BY-PRODUCT OBTAINED AFTER GINNING OF COTTON.

GINNING SEPARATES THE FIBRE FROM THE SEED AND THESE SEEDS ARE COMPRESSED TO EXTRACT OIL.

COTTON SEED OIL IS USED IN MANUFACTURE OF HYDROGENATED OIL.

COTTON SEEDS OILCAKES ARE USED AS CATTLE FEED.

IS USED FOR PHARMACEUTICAL PURPOSES. IS AN IMPORTANT SOURCE OF EDIBLE OIL USED

LARGELY IN THE VANASPATI INDUSTRY.

RUBBER NATURAL RUBBER OBTAINED FROM THE LATEX

OF THE TREE HEVEA BRASILINESIS – NATIVE OF AMAZON EQUATORIAL FOREST.

HAS PROPERTIES OF ELASTICITY, RESISTANCE TO WATER, AND NON-CONDUCTION OF ELECTRICITY.

RUBBER GROWS WELL IN HOT AND HUMID CLIMATE.

IN INDIA IT IS GROWN FROM KANYAKUMARI BELT IN THE SOUTH TO THE WINDWARD SIDE OF THE WESTERN GHATS.

KERALA= LARGEST PRODUCER OF RUBBER = 90 PERCENT OF PRODUCTION IN INDIA.

GEOGRAPHICAL REQUIREMENTS OF RUBBER

TEMPERATURE = CONSTANT HIGH TEMPERATURE OF AROUND 27 DEGREE CELSIUS. THE TREE CANNOT BE GROWN AT HIGH ALTITUDES BECAUSE OF LOW TEMPERATURE.

RAINFALL = HEAVY, WELL DISTRIBUTED RAINFALL THROUGHOUT THE YEAR. 200 TO 400 cm

SOIL = ALLUVIAL OR LATERITE SOIL.

AREAS OF PRODUCTION =

KERALA, TAMIL NADU, KARNATAKA, ANDAMN AND NICOBAR ISLANDS.

METHODS OF RUBBER CULTIVATION SOWING = IN TWO WAYS –

TRANSPLANTATION- SEED GERMINATED IN SPECIAL GERMINATION BEDS. AFTER GERMINATION SEEDS ARE FIRST SOWN IN A SMALL PLOT OF LAND OR NURSERY AND ALLOWED TO GROW INTO TINY PLANTS OR SEEDLINGS.

THE HEALTHY, WELL DEVELOPED SEEDLINGS ARE PICKED OUT FROM THE NURSERY BED AND TRANSFERRED TO THE REGULAR FIELD. PROPER DISTANCE IS MAINTAINED BETWEEN THE ROWS PLANTED.

7 TO 8 YEARS MATURITY PERIOD OF RUBBER.

FARMERS GROW COVER CROPS – TO PREVENT SOIL EROSION AND PROVIDE NITROGENOUS COMPONDS TO THE PLANT AND ARE ALSO A SOURCE OF INCOME.

Bud grafting method

A BUD OF A HIGH YIELDING IS ATTACHED TO ANOTHER PLANT.

WHEN THE SEEDLINGS ARE ABOUT 5 cm HIGH, BUDS YIELDING CLONES ARE GRSFTED ON TO THE SEEDLINGS.

THE NEW PLANT COMBINES THE BEST QUALITIES OF BOTH.

TAPPING OF RUBBER

RUBBER OBTAINED AS LATEX FROM RUBBER TREE.

LATEX IS A WHITE MILKY LIQUID OBTAINED BY MAKING A CUT 2 mm DEEP TO LET THE LATEX FLOW OUT BUT NOT TO DAMAGE THE CAMBIAM/ BARK WITH THE LATEX.

THIS IS TO BE DONE IN THE MORNING BECAUSE –

LATEX FLOWS FREELY IN THE MORNING

THERE ARE FEWER CHANCES OF RAIN IN THE MORNING IN THE AREAS OF PRODUCTION.

A TAPPER NEEDS TO BE A HIGHLY SKILLED PERSON.

TAPPING IS A LABOUR INTENSIVE WORK AND NEEDS CHEAP AND EFFICIENT LABOUR.

PROCESSING OF RUBBER LATEX COLLECTED IS TRANSFERRED TO A PAN AND TAKEN

TO THE FACTORY FOR PROCESSING.

LATEX IS PUT INTO A TANK OF WATER.

DISTILLED LATEX IS STRAINED FROM IMPURITIES – DIRT AND BARK BITS.

ACID IS ADDED TO THE STRAINED LATEX

THE RUBBER COAGULATES / THICKENS AND RISES TO THE SURFACE IN SLABS

SLABS ARE REMOVED AND PRESSED TO SQUEEZE OUT THE REMAINING LIQUIDS AND IMPURITIES.

SLABS ARE MOVED TO A SMOKE HOUSE WHERE THEY ARE DRIED FOR SEVERAL DAYS

THE SHEETS ARE PACKED IN BALES AND TAKEN TO THE MARKET FOR SALE.