We worry that
arable soil is eroding and that water for irrigation is being used unsustainably.
Switzerland lacks
arable soil, while Canada is one of the world's breadbaskets.
Initial indications of humus depletion in
arable soil have been observed in almost all EU countries in recent years.
Scientists from the Technical University Munich (TUM) suspect that the humus stocks of
arable soils are declining due to the influence of climate change.
According to Mr. Charles Darwin, they give a kind of under tillage to the land, performing the same below ground that the spade does above for the garden, and the plow for
arable soil.
Of course, this still doesn't fill in many missing bits of information (such as the knowledge that even if parts of Canada or Siberia get warmer, they will not necessarily have
arable soil, or growing seasons of the proper duration (i.e. number of months with a minimum amount of sunlight per day) to make them viable for crops.
Importantly, depletion of SOC in conventional agricultural fields is now thought to be an important factor constraining productivity as many
arable soils have suboptimal concentrations (Lal 2010).
Not exact matches
There is a grave environmental crisis in air quality (life expectancy in polluted northern cities is five and a half years lower than in the cleaner south), water and
soil (one survey showed that 10 per cent of
arable land was unsafe to grow crops on).
Former Prime Minister Bob Hawke said that «none of Australia's environmental problems is more serious than the
soil degradation... over nearly two - thirds of our continent's
arable land» (Brown 1990, p. 60).
Soil organic carbon (SOC) in
arable organic farming depends on inputs in crop residues, green manure, catch crops and animal manure.
«The rich and
arable Highveld grasslands that the Sungazers inhabit is, unfortunately for the species, also the perfect
soil for crop production.
OVER the past forty years, the world has lost nearly a third of its
arable land — because of accelerated
soil erosion due to farming and other activities.
While recent policy interventions (such as the Good Agricultural and Environment Condition requirements of the CAP, and the EU
Soil Thematic Strategy) have reduced the rate of soil loss in the EU by an average of 9.5 % overall, and by 20 % for arable lands, the study finds that four million hectares of EU croplands have unsustainable rates of soil loss (more than 5 tonnes per hectare per ye
Soil Thematic Strategy) have reduced the rate of
soil loss in the EU by an average of 9.5 % overall, and by 20 % for arable lands, the study finds that four million hectares of EU croplands have unsustainable rates of soil loss (more than 5 tonnes per hectare per ye
soil loss in the EU by an average of 9.5 % overall, and by 20 % for
arable lands, the study finds that four million hectares of EU croplands have unsustainable rates of
soil loss (more than 5 tonnes per hectare per ye
soil loss (more than 5 tonnes per hectare per year).
The FRO2 gene is common to all plants, so boosting its expression in food crops or finding variants that thrive in poor
soils could be important for increasing crop yields in the face of population growth and global warming's threats to
arable land.
Changes in the Metagenome of Prokaryotic Community as an Indicator of Fertility of
Arable Soddy - Podzolic
Soils upon Fertilizer Application — A. N. Naliukhin — Eurasian
Soil Science
Fortunately, Wamelink has been raising crops in simulated Martian
soil for years and found that it's surprisingly
arable — he's been able to grow potatoes, carrots, green beans, and tomatoes, as well as introduce earthworms to make the
soil more fertile.
2014 — The conversion into grassland showed the highest
soil organic carbon (SOC) sequestration rates, ranging between 0.4 and 0.8 t C ha − 1 yr − 1, while the opposite extreme scenario (100 % of grassland conversion into
arable) gave cumulated losses of up to 2 Gt of C by 2100.
For example, extreme storms often cause extreme
soil erosion, and the substitution of pumped groundwater for lost precipitation can lead to a permanent loss of
arable land due to salinization of
soil and land subsidence, and (as indicated above) permanent loss of aquifer storage capacity.
The natural variation that has led us out of the Little Ice Age has a bit of frosting on the cake by land use; and, part of that land use has resulted in a change in vegetation and
soil CO2 loss so that we see a rise in CO2 and the CO2 continues to rise without a temperature accompaniment (piano player went to take a leak), as the land use has all but gobbled up most of the
arable land North of 30N and we are starting to see low till farming and some
soil conservation just beginning when the
soil will again take up the CO2, and the GMO's will increase yields, then CO2 will start coming down on its own and we can go to bed listening to Ave Maria to address another global crisis to get the populous all scared begging governments to tell us much ado about... nothing.
Comparison of Allotment and Agricultural
Soils The remarkable contrast in
soil quality indicators (higher SOC, C: N, TN and lower BD) between allotments and
arable fields reveals the effectiveness of management achieved by own - growers.
With falling water tables, eroding
soils, and rising temperatures making it difficult to feed growing populations, control of
arable land and water resources is moving to center stage in the global struggle for food security.
With food scarcity driven by falling water tables, eroding
soils, and rising temperatures, control of
arable land and water resources is moving to center stage in the global struggle for food security.
To take just one fairly representative example, in the classic Rothampstead experiments in England where
arable land was allowed to revert to deciduous temperate woodland,
soil organic carbon increased 300 - 400 % from around 20 t / ha to 60 - 80 t / ha (or about 20 - 40 tons per acre) in less than a century (Jenkinson & Rayner 1977).