DLA & Seed Science Flashcards
Max area of India that can be irrigated
60%
Why is paddy sugarcane wheat not fit for DLA?
They are water intensive crops
Global terresterial area under DLA?
41.3% approx
Jackfruit, ber, pulses, millets are examples of crops in what kind of agriculture?
DLA
Annual rainfall in Dry Farming vs Dry Land Farming:
Dry <750mm
Dryland 750-1150 mm
Annual rainfall in Rainfed farming?
1150+ mm
Red Fed Farming refers to? It is practiced in?
Usage of red fescue grasses
To provide grazing for livestock.
In areas with little rainfall & poor soils
Areas with low soil moisture, high evapotranspiration that results in water deficits throughout the year
DLA
Primary goal of DLA?
Minimise water evaporation from soil
Problems of DLA
Low soil moisture retention capacity
Poor groundwater
Low yield
Inadequate available nutrients in soil
Advantage of aerobic rice cultivation
Saves irrigation water
Cost effective
Disadvantages of Aerobic Rice Cultivation?
Problem of weeds
Seed rate of aerobic rice
50 kg/ha
Harvest of aerobic rice is after how many days?
120-160 days
National Rainfed Area Authority (NRAA) is located in?
Delhi
ICAR-CRIDA Central Research Institute of DLA is located in?
Hyderabad
International Water Management Agency (IWMA) is located in?
Colombo, Sri Lanka
Centre of Excellence on DLA - CEDA, is located in?
China
Central Arid Zone Research Institute - ICAR-CAZRI is located in?
Jodhpur
Contribution of rainfed ariculture in India’s GDP?
60%
Farmers in irrigated areas earn ___% of their income from agriculture and those in rainfed areas earn only ____% from agriculture.
60%
20-30%
Share of farmers that rely on rainfed agriculture?
61%
Share of millet production and rice production in India?
Millet 89%
Rice 40%
Share of production of pulses in India?
88%
Workshop on “Promotion of Climate Resilient Crops/Varieties/Seeds (Climate Resilient/Climate Agriculture)” was hosted by who and where?
by NABARD
at ICAR-CRIDA, Hyderabad
Direct seeding of rice under dry cultivation is called?
Aerobic Rice Cultivation
Why is it called “aerobic” rice cultivation?
Soil contains oxygen throughout
unlike in flooded conditions
Techniques to increase soil moisture in DLA?
Conservation tillage and
Moisture retaining mulching
A ripe, fertilised ovule containing plant embryo, enclosed in a seed coat
Seed
Basic input of agriculture?
Seed
Transfer of pollens from anther to stigma of a flower or different flowers
Pollination
Autogamy is? Examples are?
Self Pollination
Rice, Wheat, Oats, Barley, Pea, Lentils, Chillies
Types of Autogamy?
A->BCH
Bisexual - male and female in same flower
Cleistogamy - in unopened flower
Homogamy - Same time of maturation of anther & stigma
Allogamy is aka? examples are?
Cross Pollination
Corn, Rye, Sunflower, Safflower, watermelon, sugarcane, tea
Example of often cross pollinated plants
CS-PT
Cotton, Sorghum, Pigeon Pea, Tobacco
Separate male & female flowers in 1 plant
Monoecy
(ecy = home = 1 home)
Male & Female Flowers in different plants
Dioecy
Style and filaments are of different lengths
Heterostyly
Barrier between male & female organs
Herkogamy
Same flower transfers, even if it happens, won’t fertilise
Self-incompatibility
Flower opens early to permit transfer of pollen grains to other flowers
Chasmogamy
(oppositie of Cleistogamy)