Intro to Agri 2 Flashcards
ACZ, Factors affecting crop growth and yield, cropping pattern & system
What are the factors affecting Agriculture?
Environmental Factors: SBCPE
- Socio-economic factor
- Biotic Factor
- Climatic/Abiotic Factor
- Physiological Factor
- Edaphic Factor
Internal Factors
- Genetic Factors
- Hereditary
SCOPE - with a BC
According to census 2011, % of small and marginal farmers?
Small & Marginal Farmers: 85%
Marginal: 67%
Small: 18%
What are biotic factors?
Flora and Fauna
What are the Climatic Conditions affecting agriculture?
HTP-SAW
Humidity, Temp, Precipitation
Solar Radiation, Atmospheric Gas, Wind Velocity
CLIMATE SAW through internet HTP
Relative Humidity for crops?
40-60%
Optimum Temperature for most agri crops
15-40 degree
Minimum, Optimum, Maximum temp of Rice, Wheat, Maize and Sorghum
Rice, Wheat, Maize, Sorghum
Min: 10 , 4 , 8 , 12
Opt: 32 , 20 , 20 , 25
Max: 36 , 30 , 40 , 40
What is cardinal temperature?
The Max, Min and optimum temperature of individual plants
According to IMD, A rainy day is classified as?
2.5mm or more rainfall
Average rainfall in India?
125cm
75% of it is received from June-Sept
Amount of precipitation to classify an area as dry?
0-750mm
Amount of precipitation to classify an area as receiving medium rainfall? Area receiving that rainfall in India
750-1150mm - Highest 42%
1150-2000mm
Amount of precipitation to classify an area as receiving high rainfall?
> 2000 mm - 8% of total area
What is Photoperiodism?
Response of plant to day length
LIGHT duration dependence
What is Vernalisation?
Response of flowers to low temperature
Plants that require <12 hrs of sunlight
Short Day Plant
Rice, Cotton, Sunflower
Plants that require >12 hours of sunlight?
Long Day Plant
Barley, Oat (avena sativa), Carrot, Cabbage
Photosynthetically Active Radiation (PAR): Radiation at which photosynthesis takes place is?
400-700 nm or 0.4-0.7 meu meter
Optimum Wind velocity for plants?
4-6km/hr
Which 2 gasses are the most abundantly available in our atmosphere?
Nitrogen (78%)
Followed by Oxygen at 20.95%
Amount of CO2 in our atmosphere?
0.03%
What are some physiographic factors affecting agriculture?
Topography
Altitude
Steepness of slope
Highest zone in a hilly area is?
Nival Zone
What are Edaphic Factors?
Soil related factors affecting plant growth
Range of Plant Available Water?
1/3 to -15 atm
Water going down due to gravity. Not available to plant’s root
Gravitational Water
Amount of moisture retained by the soil after a few days of being wetted and drainage has ceased
Field Capacity or
Capillary Water
Range of Field Capacity
-1/3 to -31 atm
PWP at -15 atm
The water point in soil, when most plants start to wilt - they die
Permanent Wilting Point
Beyond -15 bar
Water absorbed from atmosphere by soil particles that’s unavailable to plants
Hygroscopic
Beyond PWP
C:N ratio in Humus
10:1
% of Mineral, OM, Water, Air in soil
M = 45%
OM = 5%
W = 25%
A = 25%
Maa Maati Manush in Bihar is MOMWA - 45, 5, 25, 25
Optimum pH range for plants to takeup nutrients
6.5-7.5
Which kind of soil has high Al, low Ca, low Mg and S
Acidic soil
Can be treated with lime
HALS-Ca Acidic soil = High Al, Low S, Ca
Which element is not affected by soil acidity?
Potassium
A land unit in terms of major climates, suitable for a certain range of crops and cultivars.
Aimed at scientific management of regional resources to meet the food, fiber, fodder and fuel wood requirements without adversely affecting the status of natural resources and environment.
Agro-Climatic Zones
What are the parameters of Agro-climatic zones according to the Planning Commission?
RTTC
Rainfall, Temperature
Topography and Cropping
What are the parameters of Agro-climatic zones according to FAO?
RTTC & LGP and Climate
How many ACZ are there according to ICAR NARP?
128 zones
hich state has the highest and lowest ACZs according ICAR NARP?
MP - 12
Haryana - 2