G.L Khajuria
There is no well accepted definition of wastelands but Bhumble has used the following definition for wasteland are those lands which are virtually unstable ecologically, whose top soil is completely lost, devoid of any vegetative cover. Such lands have developed toxicity in the root zones for the growth of most plants, both for growth of annual crops and trees”. Further, this shall cover all ands affected by erosions, floods, soil salinisation and alkalinisation, water logging and so on. On hilly terrain, wastelands on snow clad mountains bare and denuded fragile rock which over the years arc geo- logically unstable.
Some three decades back, the consultative committee of Parliament chaired by the then Prime Minister of India Rajiv Gandhi on August 23rd, 1985 stated that India has a land mass of about 329 million hectares and estimates are that approximately degraded whose productivity is far below its potential.. The broad sub-divisions of degraded land resources are in Agriculture (out of 143 million hact; atleast 40 million ha or so are degraded) and in forestry sector, out of 75 million hac; 30 million hac have barely, some shrubs only, apart from the pasture and grazing and other uncultivated lands which are almost largely degraded. As, such we are having only 175 million of degraded lands in toto Amongst the major uses of land- Agriculture, forestry and grazing lands have been the most neglected and perhaps the most degraded areas.”
In such an inexplicable situation1 wastelands are formed by misuse or overuse and the large livestock population, far beyond the carrying capacity of pasture lands has probably been the major factor in the formation of wastelands. Besides, impeded drainage due to the construction of embankments, roads, canals, railway tracks and other multihued development have created new wastelands, The denudation and decimation of forest covert have ushered in large scale erosions resulted into big nallahs and ravine formation in the most degraded hills side down-below the plains. Water-lwing is another glaring aspect accruing from canal seepage which dc- facto attribute the major part of degraded and wastelands.
Greening methodology: Greening or so to say afforestation of all such wastelands is the paramount need of the hour and – covering of all such lands with suitable vegetative species prevents soil erosion, water conservation, removal of salinity from soil, restores soil microbiological activity apart from lowering soil temperature increase in water percolation and above all increase the agricultural productivity of adjoining lands. The methodology of afforestation is, however, site specific and some of the mostly degraded wastelands are usar lands, ravines, hill slopes, coastal areas, areas subject to seepage, river banks and other areas of blackish water and as such different categories of wastelands demand different ways of treatments.
User lands: Such lands which 2onStitute a part of wastelands include saline, sodic and aikaline soils and such soils are met with on hard clay as well as on sandy tracks However, intermediate stages can also be met.
Sandy soils with high PH Value 1 can be found alongside major rivers and such soils are characterised by PH range from 9 to 10 severe L drought during summer and heavy frost during winter with temperature going down to 0oC preceded flooding , lire hazards and sand drifts, On such soils popular at 5 m interval in rows, 4 m apart is best suited. Introduction of certain species in between is of ample importance and such suited species are ‘Syzygium cumini, terminalia arjuna’ and Dalbergia sisso.
Denuded hill slopes : Hill slopes in Himalayas Shivaliks have their own sad stories to tell as in such areas, most of the top soil has been badly eroded to the extent of its total wash away which hinders planting on such barren and denuded areas So, in treating such areas, introduction of shrubs is the first step to go ahead and every precaution is to be ensured to avert biotic pressure. The shrubs should be preferably be nitrogen fixing and of the few are vitex negund Bana), Athatoda vasica (Brankers) wood fordia fruticosa etc. After the soil is reclaimed, the most suited plants needs planting (local species) supplemented and supported by soil conservation measures.
Ravines: The major problem with such areas is that these occupy vast tracks and further such areas I are prone to soil erosions, scarce moisture ,fast run off, low precipitation, uncontrolled grazing, high temperature during summer and severe cold/frost during winter. Here, on such areas the main thrust should be on gully-plugging and once the gullies are plugged. Root cuttings are strongly recommended. After this being done, the most suited local spp. to site should be planted out to reclaim the wastelands and some of the most suitable viz Bamboos, grasses need preference at places for soil binding apart from introduction of Acacias, Syzygium cumini Dalbergia sisso and caesia siamea on flat top areas. Nothing can be achieved unless their depredations arc controlled and insofaras aerial seeding on such areas is concerned as a method of greening the wastelands, the operation has proved to be costly one, apart from a futile exercise.
As a corollary, all out attempts have been made over the years in greening/afforestation of wastelands, of which successful results have been achieved to varying degree. The moot point to emphasize is to protect such wastelands from grazing, lopping and above all illicit cutting. Once the area is afforestated it should form a permanent feature of the landscape. The system as such should be that the ground always remain covered.
