Soil Depletion, Food Security and generic online levitra Global Warming
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It is estimated that nearly 2 billion ha of soil resources in the world have been degraded, that's approximately 22% of the total cropland, pasture, forest, and woodland. Globally, soil erosion, chemical deterioration and physical degradation are the viagrabest viagra important parts amongst various types of soil degradation.
As a natural process, soil degradation can be increased or dampened by a variety of human activities such as inappropriate agricultural management, overgrazing, deforestation, etc. Degraded soil means less food. As a result of soil degradation, it is estimated that about 11.9–13.4% of the global agricultural supply has been lost in the past five decades. Besides, soil degradation is also associated with off-site problems of sedimentation, climate change, watershed functions, and changes in natural habitats leading to loss of genetic stock and biodiversity.
Over 99% of the world's food comes from the soil, yet experts estimate that each year more than 10 million hectares (25 million acres) of crop land are degraded or lost to water and wind erosion of topsoil. This is an area big enough to feed all of Europe. According to UN figures, 300m hectares, or about 10 times the size of the United Kingdom - has been so severely degraded it cannot produce food. In many places, soil is being lost far faster than it can be naturally regenerated. Attempts to irrigate arid lands have produced soils so salty that nothing will grow. This example is salinity induced by irrigation in the Euphrates basin in Syria.
Nutrient depletion in soils adversely affects soil quality and reduces crop yield and healthcare canadian pharmacy wow look it consequently poses a potential threat to global food security and agricultural sustainability and terrestrial ecosystems. Significantly soil depletion is creating less vigorous growth resulting in lower yields but it also creates lower rates of photosynthesis which results in reduced carbon dioxide to oxygen conversation. Nutrient depletion reduces our vegetations ability to reduce CO2 in our atmosphere which is part of the carbon sequestration we need to deal with the climate crisis. Human-induced nutrient depletion has become a serious problem for the balance in our eco systems globally. Basically we have been mining nutrients from our soil and in general we have not been replacing all the nutritional resources that planet need to thrive in the process. Here we explore and describe the causality among soil nutrient depletion, soil quality, crop production, socio-economic variables, and environmental condition. Soil fertility problems associated with human-induced nutrient depletion are widespread worldwide.
Here is a comment from Carbon Management and Sequestration Center, The Ohio State University Columbus, OH 43210, USA. “The carbon sink capacity of the world's agricultural and degradedsoils is 50 to 66% of the historic carbon loss of 42 to 78 gigatonsof carbon. The rate of soil organic carbon sequestration withadoption of recommended technologies depends on soil textureand structure, rainfall, temperature, farming system, and soilmanagement. Strategies to increase the buy viagra online usa guide soil carbon pool includesoil restoration and viagra prescription online visit our site woodland regeneration, no-till farming,cover crops, nutrient management, manuring and sludge application, improved grazing, water conservation and harvesting, efficientirrigation, agroforestry practices, and growing energy cropson spare lands. An increase of 1 ton of soil carbon pool ofdegraded cropland soils may increase crop yield by 20 to 40kilograms per hectare (kg/ha) for wheat, 10 to 20 kg/ha formaize, and 0.5 to 1 kg/ha for cowpeas. As well as enhancingfood security, carbon sequestration has the potential to offsetfossilfuel emissions by 0.4 to 1.2 gigatons of carbon per year,or 5 to 15% of the global fossil-fuel emissions.“
Societies in the past had collapsed or disappeared because of soil problems. Easter Island in the Pacific was a famous example, Ninety per cent of the people died because of deforestation, erosion and soil depletion. "Society ended up in cannibalism, the government was overthrown and people began pulling down each other's statues, and destroying infrastructure. That is pretty serious. In Iceland, 50% of the soil ended up in the sea. Icelandic society survived only through a drastically lower standard of living.
Prof Diamond said “Media and Governments have generally focused on fossil fuel problems, biodiversity, logging, forest fires, climate change, but not on the soil because it was less spectacular however it is at the root of many of our other problems.. There are about a dozen major environmental problems, all of them sufficiently serious that if we solved 11 of them and didn't solve the 12th, whatever that 12th is it could potentially do us in. Many of them have caused collapses of societies in the past, and soil problems are one of those dozen.”
It is becoming abundantly clear that developing rich and viagra purchase uk healthy soil is part of the solution to many of our environmental problems. Therefore, it is essential to combat soil degradation at different levels and scales worldwide, not only for food security and ecological health, but also for the guarantee of global sustainable development. Even in un developed countries we can encourage simple soil and water management measures against erosion and water scarcity as shown here. Left: Micro-basins; Centre: Mulch; Right: Conservation tillage. (Credit: WOCAT)
We can play and active roll is this change not only in how we treat our soil but by letting our public policy makers know how important this issue is to our way of life and in fact to our survival.