THE WEED FLOOR CULTIVATED FIELD IN DIFFERENT PARTS OF KARNATAKA-A STUDY

BOTANY

They share about 80 per cent of the total raw jute production of which West Bengal alone accounts for over 50 per cent. Fibre is obtained from the stem of cultivated varieties of two species commonly known as white and tossa. Tossa fibre is generally finer, softer, stronger, more lustrous and with less root content than white fibre. Besides these two species, mesta is regarded as a substitute fibre for jute. Oilseeds which constitute an important group among the commercial crops also play an important role in preparation of useful products like medicines, perfumes, varnishes, lubricants, candles, soaps, etc. Oil cake, the residue after oil extraction, is an important cattlefeed, substantial quantities of which are exported. India is one of the leading oilseed producing countries of the world. The principal oilseeds have been dealt with in this section. Castor, indigenous to eastern Africa, is generally grown in India for its oil yielding seeds. The oil content of the seeds varies from 35- 58 per cent in different varieties. The oil is used as a lubricant in the manufacture of soaps, transparent paper, printing inks, varnishes, linoleum and plasticizers. It is also used for medicinal and lighting purposes. Generally it grows in the plains and at elevations upto 1,200 m. It cannot stand frost, continued heavy rain or prolonged drought. Sesamum requires about 21 °C temperature and a moderate rainfall. The crop requires well drained light loamy soils. In the northern states it is mostly grown as a kharif crop and in the southern states it is generally grown during the rabi season.

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