what do you think are the poor farming practices that cause loss of arable land?
104654
Geography homework huh.\n\nBroadly.\n\n1) Improper removal of stubble or fallow cover leading to  erosion.\n\n2) Insufficient fallow time leading to decline in soil fertility.\n\n3) Over removal of tree cover leading to water table elevation and/or salinity.\n\n4) Over production of single crop types crops leading to nutrient depletion.\n\n5) Over-irrigation leading to turbidity and and slainity in irriagtion water sources.\n\n6) Failure to control tree growth within catchment leading to excess infiltration and loss of runoof. Irrigation water fails.\n\n7) Excess tillage of fragile soils leading to erosion.\n\n8) Tillage of soils in anticipation of  planting conditions that fail to transpire. Ground remains loose and without plant cover for extended periods and erodes.\n\n9) Overgrazing leading to desertification which encroaches on arable land.\n\nThat probably covers most of the practices that have caused land loss in the poast 6000 years.
1174309
I agree with you... the world probebly produces enough food.... however people starve due to poverty... impovrish countries cannot afford to get the food to their people or bad land like you said!
126899
Try a country in Africa \nAnalysis of the impacts of climate change suggests that agro-ecological systems are the most vulnerable sectors. Agriculture in low latitude developing countries is expected to be especially vulnerable because climates of many of these countries are already too hot. Further warming is consequently expected to reduce crop productivity adversely. These effects are exacerbated by the fact that agriculture and agro-ecological systems are especially prominent in the economies of African countries and the systems tend to be less capital and technology intensive. Predictions of impacts across regions consequently suggest large changes in the agricultural systems of low latitude (mostly, developing) countries.
1183571
The governments egged on by lobbying business interests, are fast disengaging from affairs related to farming viz. irrigation, finance & other support. Traditionally no rule could afford to ignore their agriculture& irrigation as they formed the basis of their sustenance & material. Now with western planning dictating the policy directions  of most of the third world, the governments are no more engaged in developing sustainable water bodies & the hapless farmers are left at the mercy of unscrupulous business interests & moneylenders.\nNow that water is fast being made into a commodity at the behest of new trade agreements pushed through by the western governments and the demand for the megere fresh water resources available on earth  escalating ( note the numerous water disputes among riparian states) the condition of farmers in the current senario is hopeless.\nAs of now the establishments in power have no viable solutions for the farmers woes nor do they really intend to.\nThey support companies patenting grains, cereals etc, which were grown from time immemorial by farmers.  Implying the farmers hereafter have to pay these companies for the seeds even if they are cultivated by themselves. In the name of developing hybrid & hiyield vareties they are trying to make sure that word agriculture depends on them & pay them for each crop.\n The existing markets which farmers are well acquainted with are destroyed and systems that would favour transnational business interests are being installed. \nIn short the goats are left at the mercy of wolves.
435728
I am in favor of green revolution because half the world population is still suffering for paucity of food grains.Yes there are many harm especially to environment but Human existence should be priority.
1153988
Agriculture generally requires large area of land and is land intensive. Land is ever becoming a scarce resource as world population is keeping exploding as a result of which the existing household per capita land is decreasing and hence people are cutting down forests in search of additional land for agriculture. On the other hand household lands are being monopolized by big commercial farms driving household farmers into towns. Still in some places household farmers are changing int producing high value products that do not need big land area.This has brought about a change in agriculture pattern in many areas of the world.
145385
Some soil is lost with the harvesting of the sod.  This is replaced when necessary.
495241
I'm not sure the government is encouraging the change, but there is certainly very little in policy to encourage farmers. This is mainly about economics. Due to land, labour and distribution costs it's very difficult for UK farmers to be competitive in the market. The government doesn't believe in subsidising the farming industry therefore it has to shrink to a profitable core.
617961
i don't think it's currently the number as much as it's the location.. people are multiplying in regions incapable of sustaining them. ironically, birthrates are often decreased in agrarian areas.
821662
Deforestation led to poor soil quality led to the formation of deserts. Don't be an idiot.
1135290
(1) The term desertification is  applied to land degradation in dry lands.\n\n(2) It is  resulting mainly from adverse human impact. “Land” in these terms includes soil and local water resources, the land surface and vegetation or crops, while degradation implies a reduction of resource potential.\n\n(3) There are several causes of desertification.\na) Fuelwood crisis\nb) Overcultivation \nc) Poor management of irrigation schemes\nd) Mechanical techniques \ne) Erosion made from Poor land use pattern\nf) Negative results of deforestation
505803
He has ruined Zimbabwe with his land redistribution programs.  These programs were created to generate votes and support that destroyed the farming industry.  The small little farms are not able to feed everyone.  The larger "white" farms were very efficient and produced so much that Zimbabwe was an exporter of farmed goods.  Now they are importing basic foods.  He has ruined a nation for his own political gains.  He used the race card for his own good and not for the people of Zimbabwe.
457485
Deforestation is the loss or continual degradation of forest habitat due to either natural or human related causes. Agriculture, urban sprawl, unsustainable forestry practices, mining, and petroleum exploration all contribute to human caused deforestation. Natural deforestation can be linked to tsunamis, forest fires, volcanic eruptions, glaciation and desertification. The effects of human related deforestation can be mitigated through environmentally sustainable practices that reduce permanent destruction of forests or even act to preserve and rehabilitate disrupted forestland.
83663
The years preceeding the Dust Bowl were very good.  The farmers were booming and they started buying more land to plant more crops.  They started taking out loans to buy the land and machines.  Then there was a drought.  They had all this land that they cleared for crops and and the crops died.  So when the plants died from lack of water and the wind came it blew all that loose dirt everywhere.  So there was little food and everything was dirty.  If they had no crops to sell they didn't have money.  Loans on the property and machinery started to foreclose.  This was one factor of the Great Depression.  Now if you drive through a state like Oklahoma you will see a single row of trees planted.  These are called windbreaks.  It is supposed to prevent loose dirt being blown around again.
309291
Are you sure that these towns are that bad?  People often pay pretty high prices to buy these houses.  I do agree that they often do not match the rural character of the farms nearby, but people need somewhere to live.\n\nThere is a balance between providing housing and preserving farmland.  The economics of farming these days mean that you need huge amount of acreage and low property taxes to be able to stay in business.  If development is allowed on the land, a lot of times it will not make sense to keep farming and a farm community will turn into another exburb.
110047
The short answer is that soil erosion will tend to reduce harvests in areas where soil is lost and increase harvests where soil is deposited.\n\nIt isn't a coincidence that the earliest civilisations all grew up along rivers: The Nile, The Tigris, The Euphrates. All those rivers flood annually and deposit large amounts of highly fertile soil eroded from further upstream. That erosion allowed those river valleys to produce the largest agricultural harvests in the world.\n\nEven today much of our agriculture is dependent on soil erosion. We stll farm the banks of many major rivers such as the Misissipi and Amazon because the depisited soils make those areas highly fertile\n\nIn contrast the mountainous headwaters of those same rivers are highly unproductive because the soil gets washed away every year. As a result the soils are very thin and the land is totally unsuitable for plant agriculture.
114017
Does your question is "soil erosion in nepal"?\n\nlet's try this website\nhttp://www.slemishcollege.org.uk/Soil%20Erosion%20in%20Nepal_files/frame.htm