( Family: Brassicaceae Origin : Mediterranean region (North Europe) KnolKhol (Brassica oleraceae var. gongylodes) Family: Brassicaceae Origin : Mediterranean.

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Presentation transcript:

( Family: Brassicaceae Origin : Mediterranean region (North Europe) KnolKhol (Brassica oleraceae var. gongylodes) Family: Brassicaceae Origin : Mediterranean region (North Europe)

► The cultivation of knolkhol or Kohlrabi in India is not very popular except in Kashmir, W.B. and some parts of the south. ► KnolKhol is characterized by the formation of tuber which arises as thickening of the stem tissue above the cotyledons. ► This tuber or knob develops entirely above the ground. This portion is used for vegetable. Young leaves are also used. ► It is high in minerals like Ca, Mg, P, Na & S. ► It also contains protein, carbohydrates, Vitamin A & C. ► Knobs are either used as cooked or as boiled vegetable. ► Also used as salad. ► Leaves are also used in preparation of soup.

Climate  It is mainly grown as a winter vegetable crop and thrives well in a relatively cool moist climatic conditions.  Seeds of knolkhol germinate well at o C.  Optimum temperature for its growth is between o C depending upon cultivars.  Early varieties are more prone to premature bolting.  When grown below 15 o C for longer period, these varieties produce flowering stalks directly without forming knobs.  High temperature after planting can delay the bolting of plants.  Crop grows well for the tuber production at o C though the quality is better under lower temperature.  Purple varieties are more susceptible to pre-mature bolting.  All types of soil though it makes no high demand upon it.  Good condition and fertility favour growth in a uniform manner. Soils

Planting Time Seed sowingTransplanting time Early cropAugustSeptember Main cropSeptemberOctober Late cropOctoberNovember HillsMarch-AprilMay-early June Under North eastern plains. Seed sowing Low HillsJuly-October Mid HillsJuly-October High HillsMarch-July Himachal Pradesh

Seed Rate  g/ha ( g in H.P.) ◙ cm x cm (30 x 20 cm in H.P.) ◙ Optimum yield obtained at 30 cm x 25 cm. Planting Distance Manures and Fertilizers FYM (q/ha)NP2O5P2O5 K 2 O (Kg/ha) ☻Half of N and full P and K fertilizers should be applied as basal (at transplanting) and half N one month after sowing planting.

Interculture and Weed Control  Proper moisture should be maintained during its growth.  Pre-planting application of weedicide followed by hoeing & weeding in the later stage will keep the crop free of weeds.  Any check in the growth will cause development of fibrous knobs.

Harvesting and Yield Harvest tubers before fully grown, because old tubers eventually become fibrous. Generally, tubers of 5-8 cm dia & bright colour along with the foliage are favoured in the market. Late varieties may attain cm dia at harvesting stage. For its marketing, the main root is cut off & the enlarged stem along with the leaves are tied up. Individual tuber may weigh g The yield/ha may vary from t/ha under Indian conditions.