Dryland Agriculture-Introduction

By TamilNadu Agricultural University on 23 Dec 2018 | read
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Dryland Agriculture: An IntroductionImage title

Dryland Agriculture refers to growing of crops entirely under rainfed conditions.

Based on the amount of rainfall received, dryland agriculture can be grouped into three categories:

  1. Dry Farming: Cultivation of crops in areas where rainfall is less than 750 mm per annum
  2. Dryland Farming: Cultivation of crops in areas receiving rainfall above 750 mm
  3. Rainfed Farming: Cultivation of crops in regions receiving more than 1,150 mm.

Soil moisture dynamics in Dryland

During rainy period, a portion of the rain received goes as runoff and remaining part enters the soil. It generally percolates to the lower layers and sometimes, goes beyond the root zone of crops. After the rain, the surface soil gradually dries out either due to evaporation or transpiration or due to both.

 

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