Cropping Systems and Patterns: Shifting Cultivation vs. Crop Rotation

Shifting Cultivation (Land Rotation or Jhumming)

  • Process of Land Preparation: Forest land is first cleared and then brought under cultivation.
  • Soil Fertility Decline: Because the same crop—most generally rice—is cultivated on the same piece of cleared forest land year after year, the productivity of the soil is eventually lost.
  • The Shift: Once productivity is depleted, the cultivation process is moved to another plot of land that has been prepared via the slash and burn method.
  • Dynamics of Land and Crop:
    • In this system, the land is rotated while the specific crop being grown remains fixed (the same crop is grown year after year).
    • Because the land is what changes, it is frequently referred to as Land Rotation.
  • Terminology:
    • The movement from one piece of land to another is why it is called Shifting Cultivation.
    • It is also known locally and traditionally as Jhum cultivation or Jhumming.
  • Ecological Impact: Shifting cultivation is noted for causing significant soil erosion.
  • Geographical Distribution: This practice is primarily found in:
    • Northeastern states of India.
    • The Chhotanagpur plateau of Jharkhand.
    • Madhya Pradesh (M.P.M.P.).
    • Various hilly areas.

Crop Rotation

  • Conceptual Distinction: Crop rotation is described as the reverse of land rotation. In this practice, the land remains fixed in one position, but the types of crops grown are rotated year after year.
  • Formal Definition: Crop rotation refers to the repeated cultivation of different crops, or the alternation of crops and fallow land, in a specific sequence on a certain piece of land.
  • Illustrative Example of Sequence:
    • Agricultural Year 2020−212020-21: Rice - Wheat - Moong.
    • Agricultural Year 2021−222021-22: Rice - Mustard - Chilli.
  • Mechanism of Rotation: In the transition between the two years provided in the example, Wheat is rotated with Mustard, and Moong is rotated with Chilli in the subsequent agricultural year.
  • Economic and Agronomic Benefits:
    • The system maintains and can even improve the fertility of the soil.
    • It helps to stabilize the farmer's income by diversifying production.
  • Conservation Benefits:
    • It checks (prevents) soil erosion.
    • It assists in the conservation of soil moisture.