Field Crop – Paddy (Oryza sativa)

Paddy (Oryza sativa)

Field Crop – Paddy (Oryza sativa)

Question And Answers

Quest. The botanical name and family of paddy.
Ans. Oryza sativa, Poaceae

Quest. The chromosome number of paddy.
Ans. 2n = 24.

Quest. The cultivated spp. of paddy.
Ans. O. sativa and O. glaberima

Quest. The protein (Oryzein) content in paddy.
Ans. 6-7%

Quest. Indica rice is grown in.
Ans. India

Quest. Japonica rice is grown in.
Ans. Japan

Quest. Javanica rice is grown in.
Ans. Indonesia

Paddy (Oryza sativa)
Paddy (Oryza sativa)

Quest. Rice inflorescence is called as
Ans. Panicle

Quest. Optimum temperature for good rice crop growth is
Ans. 30-320C

Quest. Best pH for cultivation of rice is
Ans. 4-6 pH

Quest. Sowing of paddy in April-May and harvesting in August-Sept. is called as-
Ans. Aus / Autumn / Pre kharif paddy

Quest. Sowing of paddy in June-July and harvesting in October is called as
Ans. Aman / Kharif / Aghani

Quest. Sowing of paddy in January-Feb and harvesting in April-May is called as
Ans. Boro/Summer/Spring

Quest. The best system of rice culture is
Ans. Transplanting

Quest. The tillage implement, most suitable for rice cultivation is
Ans. Power tiller

Quest. Hulling percentage of rice is
Ans. 70-75%

Quest. The gene responsible for dwarfness in rice is
Ans. Dee-gee-woo-gene

Quest. First intervarietal cross variety of rice?
Ans. Jaya (TN1 = T141)

Quest. The rice variety called ‘miracle rice’ is
Ans. IR-8

Quest. Normally rice plant is transplanted at
Ans. 21-25 days after sowing (3-4 leaf stage)

Quest. Under SRI method, rice plant is transplanted at
Ans. 10-12 DAS (Days After Sowing)

Quest. SRI denotes
Ans. System of Rice Intensification

Quest. In rice ‘Dapog seedlings’ are ready for transplanting
Ans.11-14 DAS

Quest. Dapog method is most commonly prevalent in
Ans. Philippines

Quest. The nursery area required for providing seedlings for transplanting 1 ha rice field
Ans.1000 m2 (1/10 ha)

Quest. Most prominent cropping pattern of rice in India?
Ans. Rice-Wheat

Quest. Rice prefer nitrogen uptake in
Ans. Ammonical form (NH4).

Quest. The best fertilizer for top dressing in rice?
Ans. Ammonium sulphate

Quest. The recommended dose of N, P and K for rice crop
Ans. 100:60:40 kg ha–1

Quest. For correction of iron chlorosis in rice, following spray is recommended
Ans. 1% solution of ferrous sulphate

Quest. The nitrogen fixing bacterium found on root surface of rice
Ans. Azospirillum

Quest. The most important critical stage of rice for irrigation
Ans. Tillering to flowering stage

Quest. In low land rice, fertilizer is applied in
Ans. Reduced zone only

Quest. Nitrogen use efficiency in rice is around
Ans. 30-40%

Quest. Aroma in rice is due to presence of
Ans. “Di-acetyl 1 propaline” chemical

Quest. Anaerobic environment in rice soil is responsible for gaseous loss of fertilizer nitrogen by
Ans. Denitrification

Quest. The Gall midge resistance varieties of rice is
Ans. Phalguna, Surekha, Suraksha

Quest. The Blast resistance varieties of rice is
Ans. Tulsi, IR64

Quest. The deep water rice are
Ans. Punkaj, Jagannath

Quest. Rice varieties suitable for Saline-alkaline soil are
Ans. CSR-10, CSR-13, CSR-27

Quest. Super rice variety is
Ans. Lunishree

Quest. Gas emitted from rice field is
Ans. CH4 (Methan).

Quest. Weed caused relatively more loss in rice productivity, when it is
Ans. Direct seeded

Quest. Most dominated weed species in rice field is
Ans. Echinochloa spp.

Quest. Common herbicide used in rice crop field?
Ans. Anilophos and Butachlor.

Quest. Polish percentage of rice is
Ans. 2%

Paddy (Oryza sativa)
Paddy (Oryza sativa)

Quest. Khaira disease is caused by
Ans. Zn deficiency.

Quest. Akiochi disease is caused by
Ans. H2S toxicity.

Quest. White eye of rice is caused by
Ans. Fe deficiency.

Quest. Dead heart and white ear of rice is caused by
Ans. Yellow stem borer

Quest. Killer disease of rice are
Ans. Bacterial Leaf Blight (BLB) and Tungro virus

Quest. Hydrothermal process of rice which saves vitamin B12?
Ans. Parboiling