Few important facts

• Double cross technique for hybrid seed production : DF Jones (1920).
• Jute (Conchorus spp) ; fibre is obtained from phloem.
• First commercial cotton of world is Hybrid-4.
• Highest area under wheat is Russia.
• Ist commercial hybrid cotton of world is hybrid-4.
• Cursec of water is equivalent to 1780 lpm.
• A neutral soil has pH between 6-8.
• Kalyan sona is the variety of paddy.
• Varuna  is the variety of Indian Mustard.
• Salt resistant variety of Barley is Bilara-2.
• Low quality jute fibre is attributed to discoloration of fibre and very short fibre strands.
• Physiological stages of wheat is

a) CRI

b) Seedling stage

c) Tillering

d) ear emergence

• Optimum temperature for rice seed germination is 30-32 ⁰
• Ist herbicide produced in world is 2,4-D.
• The ratio of cotton seed to lint is 2:1.
• Tensiometer is used at pressure of 0 to 0.8.
• Black cotton soil is deficient in Nitrogen.
• Jhuming means conventional method of cultivation in hilly areas.
• Hulling % of rice is 67%.
• Dapog method is concerned with nursery raising.
• Arkel is variety of Pea.
• 1 acre = 0.404 ha.
• SSP is a cheaper fertilizer.
• Short day plants require 8 hrs of light for good flowering.
• For setting of jute, best temperature is 34 ⁰
• H-777 is a variety of cotton.
• Hazar dana : Phyllanthus nirusis
• Krishna nil : Anagallis arvensis