Skip to main content

Agronomy - Agrometeorolgy module 5


WEATHER FORECASTING

Type of weather forecast


Types of forecast
Validity period
Predictions
Uses
1
Short range
Up to 72 hours
Rainfall distribution, heavy rainfall, heat and cold wave conditions, thunder storms etc.
Scheduling of irrigation
Adjusting of time of agricultural operations
Protection of plants from frost

2
Medium range
Beyond 3 days and upto 10 days.
Occurrence of rainfall, Temperature.
Useful to determine sowing time
Useful to determine depth of sowing
Planning of irrigation
Decision on harvesting
Decision on time of spraying to get higher efficiency
Management of labour and equipment

3
Long range
Beyond 10 days upto a month and a season.
This forecasting is provided for Indian monsoon rainfall. The out looks are usually expressed in the form of expected deviation from normal condition.
To decide on soil moisture management
to decide on irrigation scheduling
decision on selection of crops
decision to manage irrigation with limited water supply
decide on cropping pattern and
to determine crop yield




CLIMATE CHANGE

            The earths atmosphere has never been free of change ( in its composition, temperature, self-cleaning ability).  Due to change in atmosphere the world is warming, climatic zones are shifting; glaciers are melting and sea level is rising. We anticipate these changes to accelerate over the next few years to come.

Greenhouse effect: The theory of "greenhouse effects" was conceived by the French Mathematician J.B. Fourler over a century ago.  It was supported by Tyndall's studies on the absorption of heat by gases. 
            Increased human activities increase carbon dioxide, methane, nitous oxide, chloro flurorocarbons (CFC) etc., which lead to increase in temperature and sea level rise.  These gases which are in traces cause environmental parturbations ( distrubances) such as green house effect ( global warming), stratospheric ozone depletion , acid deposition, smog and corrosion.

Environmental Perturbations                                  Responsible  gases

1. Green house effect                                      Co2,CH4(Methane, N2, CFCS, Ozone
2. Ozone depletion in the stratosphere           Chloro-fluoro carbons (CFCS)
3. Acid deposition                                           SO2, NO, NO2, S, O3
4. Smog corrosion                                           SO2



AGRICULTURAL SEASONS OF INDIA

            Season is a period in a year comprising few months during which the prevailing climate does  not very much.  Growing season for a crop is more important for its yield and other management practices to be followed.
           
Indian Meteorological Department has divided the year into four seasons.

i. Summer                                : March- May
ii. Monsoon                             : June- September
iii. Post Monsoon                    : October- November
iv. Winter                                : December - February

            The monsoon season is designated as Kharif, whereas the post monsoon and winter seasons are together designated as "Rabi" throughout India.

            Based on temperature ranges three distinct crop season have been identified in India.

i.                    Hot weather ( Mid February-Mid June)
ii.                  Kharif or  rainy season ( Mid June-Mid October)
iii.                Rabi ( Mid October to Mid February)

In Southern states ( Tamil Nadu, Andhara Pradesh and Karnataka) there is slight variation  in the season based on rainfall duration as

1.      Winter                   - January and February
2.      Summer                 - March to May
3.      Rainy season         - a. South West monsoon - June to September
  b. North East  monsoon - October- December

            Based on the criteria, monthly precipitation and temperature, the growing season is broadly divided as follows:-

i.          Hot month                              - if the average temperature is above 20oC
ii.         Cold month                             - if the mean temperature is between 0-10oC
iii.        Warm month                           - if the mean temperature is between 15-20oC


Comments

Popular posts from this blog

Tamil eligibility test sslc standard free mock test | 100 MCQ

TNPSC AO Free Mock Test Time left = tnpsc free online test in tamil medium, Tamil eligibility test sslc standard, tamil eligibility test sslc standard, tnpsc group 2 tamil eligibility test model question paper, free mock test for tnpsc group Q1 ) வேர்ச்சொல்லுக்குரிய வினையெச்சம் இடம்பெறாத இணையைத் தேர்ந்தெடுக்க. வா - வந்து காண் - கண்ட கொள் - கொண்டு நில் -நின்று Q2 ) வேர்ச்சொல்லைத் தேர்வு செய்க. வாழியர் வாழ் வாழி வா வாழிய Q3 ) ஒரு பொருள் தரும் பல சொற்கள் 'நெருப்பு' அனல், கனல் தணல், வெயில் தண்ணீர், தீ வெயில், குளிர் Q4 ) ஒலி மற்றும் பொருள் வேறுபாடறிந்து சரியான பொருளை கண்டறிக. அலை - அளை கூப்பிடு - தயிர் நத்தை - சேறு துன்பம் - சோறு கடல் - பாம்புப்புற்று Q5 ) விலை, விளை, விழை ப

Tnpsc agricultural officer free mock test

TNPSC AO Free Mock Test Time left = IBPS AFO FREE QUIZ TNPSC AO exam date 2023, tnpsc ao syllabus, tnpsc ao notification, tnpsc ao, tnpsc ao question paper, tnpsc ao free mock test Pennisetum violaceum is a source for _____in Bajra Downy mildew resistance Ergot disease resistance Male sterility Stem borer resistance Which of the following method is not relevant to hybrid rice seed production? Three-line system Two-line system Using chemical emasculators Using Gynomonoecious lines Seedlings with weak (or) unbalanced development of essential structures are referred as Decayed seedlings Deformed seedlings Damaged seedlings Diseased seedlings Minimum germination limits prescribed for labelled seed of cotton is___(%) 80 65 75 60 Number of plants required for sample for maximum permissible off-types

IBPS SO FREE QUIZ

IBPS AFO QUIZ FREE Time left = IBPS AFO FREE QUIZ Soybean is plant Long day Short day Intermediate day length Day neutral Which crop has the maximum yield potential in the world Wheat Chickpea Maize Rice Rice can survive in an aquatic environment It is tolerant to water It can transport O2 from the leaves to the roots It is aquatic plant All The inflorescence of sugarcane is Panicle Spike Cob Arrow When fertility gradient in one direction, the statistical design to be used CRD RBD SPD LSD Split application of fertilizers is useful under Sandy soil Loamy soil Clayey soil All The oil and protein content of groundnut are 45 & 26 % 20 & 50 % 35 & 45 % 52 & 20 The ICAR was esta