Wednesday 5 December 2012

Agriculture notes prepared by IAS Topper for all agriculture based competitive exams-Social Forestry and Agro-forestry

Social Forestry and Agro-forestry 

Social Forestry

Definition: It is the practice of forestry on lands outside the conventional forest area for the benefit of the rural and urban communities. It supplies food, fodder, fuel, furniture, recreation and protection to agriculture. Therefore it satisfies the economic and cultural needs of the community. Social forestry is also described as forestry for the people, by the people and of the people.

Objectives

·        Increasing the total forest cover is the broader objective
·        To meet the social needs of the community like food, fodder fuel etc.
·        To provide gainful employment opportunities to the rural people
·        To develop rural industry
·        To provide soil and water conservation
·        To improve aesthetic value of an area and to meet the recreational needs of the population

Components

1. Farm forestry: It is the practice of forestry n farms in the form of raising rows of trees on the bunds or boundaries of field and individual trees in private agricultural land as well as creation of windbreaks which are protective vegetal screens created around a farm or an orchard b raising one or two lines of trees fairly close with shrubs in between.
2. Extension Forestry: it is the practice of forestry in areas devoid of tree growth and other vegetation and situated in places away from the conventional forest areas with the objective of increasing the area under tree growth. In farm forestry the ownership of land is usually with private individual while in extension forestry it is with the community.
·        Mixed forestry: It is for raising fodder grass with scattered fodder trees, fruit trees and fuel wood trees on suitable wastelands, panchayat lands and village commons.
·        Shelter belts: Shelter belts is defined as a belt of trees and/or shrubs maintained for the purpose of shelter from wind, sun, snow drift etc. They are generally more extensive than the windbreaks covering an area larger than a single farm.
·        Linear strip plantation: these are plantations of fast growing species on linear strips of land on the side of roads, canals, railway lines etc.
3. Recreational Forestry: It is the practice of forestry with the object of raising flowering trees and shrubs mainly to serve as recreation forests for the urban and rural population. The main objectives are not to produce timber, fuel and grass but to raise ornamental trees and shrubs to meet the recreational needs of the people. It improves the aesthetic value of the surroundings.

Suitable tree species for social forestry

  1. Siras               : Albizzia lebbek,
  2. Shisham         : Dalbergia sisso,
  3. Jamun             : Sysyglum cumini
  4. Neem              : Azadirachta indica
  5. Senji               : Moringa oleifera
  6. Ber                  : Zizyphus mauritiana
  7. Imli                  : Tamarindus indica

Drainage
Water logging is the main problem which may be due to heavy and continuous rainfall and faulty irrigation practices
Adverse Effects
·        Poor or no oxygen supply to plants
·        Accumulation of toxic substances like hydrogen gases, H2S, CO2, CH4 etc.
·        Leaching of nutrients and denitrification
·        Inability of plant to absorb water and nutrients due to lack of oxygen
·        Anaearobic respiration leads to more ethanol production which are inurious to roots of crop plants.
Sensitive crops: Ex. Tobacco, Tomato, Pearl Millet, Cotton, Chillies, Pulses etc.
Agricultural Drainages:
Drainage is the removal of excess water known as superfluous water or gravitational water from the surface or below the surface of farm land so as to create favourable soil conditions for plant growth. It is estimated that the water logged areas in India account for about 6 million hectares.
Types of Drainage systems
Surface drainage system
a). Random Ditch system: Low spots in fields often accumulate runoff from adjoining higher areas and stand ponded for several days or weeks after a heavy rain. Surface water from ponded areas may be removed by random field ditches.

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