Traditionally, large share of the total cropped area was
under barley and wheat. Households have increased vegetable production for
domestic use as well as cash crop mainly to meet demand of army and tourism
industry. Introduction of public distribution system in the region resulted in
increase in dependency and decline of cultivation of traditional crops like
wheat and barley.
Furthermore, Ladakh’s harsh environment, marked by a thin
atmosphere, intense ultraviolet radiation, and scarce water resources, poses
significant challenges to traditional farming. Nearly half of all households
own less than 0.5 hectares of land, and open-field cultivation is feasible for
only a few months each year. To overcome these constraints, various forms of
protected cultivation such as passive solar greenhouses, trench greenhouses,
and low tunnels, have been developed and customized to suit the region’s unique
conditions.
These protective structures create controlled
micro-environments that capture solar radiation and retain heat, enabling
year-round or extended-season crop production. This not only boosts yields but
also strengthens Ladakh’s food and nutritional security.
The Defence Institute of High-Altitude Research (DIHAR),
formerly known as the Field Research Laboratory (FRL), pioneered greenhouse
agriculture in Ladakh. The institute began experiments in 1964, achieving
successful cultivation of vegetables such as kale, parsley, celery, spinach,
lettuce, and Swiss chard under controlled conditions.
Early greenhouse models in Ladakh were simple structures
built with three thick mud-brick walls and a south-facing polythene sheet,
which required replacement every one to two years. DIHAR later upgraded these
designs by using triple-layered polycarbonate sheets for improved durability
and transparency, while replacing mud-brick walls with heat-absorbing stone.
Additionally, recessing the structure about three feet below ground level
helped enhance insulation, raising internal temperatures by 7–8°C above the
outside air.
Modern Ladakhi greenhouses now make it possible to cultivate
a variety of vegetables throughout the year. During winter, farmers grow
spinach, Swiss chard, cabbage, lettuce, Siberian kale, coriander, and
fenugreek. In summer, the same structures are used for tomatoes, brinjals, and
cucurbits. These greenhouses also function as off-season nurseries for fruit
and vegetable crops—including apple, apricot, pear, and various
vegetables—allowing seedlings to be started one to one and a half months
earlier than in open-field conditions.