mountain slopes and valleys in siwalik mountains

siwalik system mountain slopes valleys mountains india trees cut branches livestock feed dry prehimalayas pruning agriculture chasm cloud forest coniferous wood crest evergreen forests tree farming gorge hill himachal pradesh himalaya himalayas lesser mahogany chain landscape landscapes mountainside nature outer rainforest ravine revival ridge row semievergreen softwood spring time travel lowwater woodland young pre-himalayas india