20th+

Dig for Victory

In Britain, "digging for victory" used much land such as waste ground, railway edges, ornamental gardens and lawns, while sports fields and golf courses were requisitioned for farming or vegetable growing.

Sometimes a sports field was left as it was but used for sheep-grazing instead of being mown (for example see Lawrence Sheriff School § Effects of the Second World War).

By 1943, the number of allotments had roughly doubled to 1,400,000, including rural, urban and suburban plots.

C. H. Middleton's radio programme In Your Garden reached millions of listeners keen for advice on growing potatoes, leeks and the like, and helped ensure a communal sense of contributing to the war effort (as well as a practical response to food rationing).

County Herb Committees were established to collect medicinal herbs when German blockades created shortages, for instance in Digitalis purpurea (Foxglove) which was used to regulate heartbeat.

Victory gardens were planted in backyards and on apartment-building rooftops, with the occasional vacant lot "commandeered for the war effort!" and put to use as a cornfield or a squash patch.

During World War II, sections of lawn were publicly plowed for plots in Hyde Park, London to promote the movement, while allotments growing onions in the shadow of the Albert Memorial also pointed to everybody, high and low, chipping in to the national struggle.

Both Buckingham Palace and Windsor Castle had vegetable gardens planted at the instigation of King George VI to assist with food production.

Victory garden - Wikipedia

Dig for Victory > .
?search Dig for Victory? .

Why Moderns Should Care About Victory Gardens - occ > .

Pests, diseases, and ghastly chemical pesticides

Victory Garden 1989-1991
https://www.youtube.com/playlist?list=PLOj8txIbnv0Ht-5jGBUyeSx1daFNbIJEK

Dig for Victory ~ Ben
https://www.youtube.com/playlist?list=PLYZbCEPmWCtOBY7R0r44RMo1_fONlBBIL

Wartime Kitchen & Garden ~ Ben
https://www.youtube.com/playlist?list=PLYZbCEPmWCtNMSEGq5HvXsduK5H1f17zm

https://www.youtube.com/user/AbsolutelyFavulous/playlists?view=1&shelf_id=0&sort=dd
Original Victory Garden
https://www.youtube.com/watch?v=31hB5d__UT4

Dig for Victory - Ben Silver
https://www.youtube.com/playlist?list=PLYZbCEPmWCtOBY7R0r44RMo1_fONlBBIL

.Why Moderns Should Care About Victory Gardens - occ > .

Victory gardens ww1 ww2

https://www.youtube.com/watch?v=XkPVInuJZII

Victory Garden >> .

Wednesday, October 24, 2018

Electric Fence

Electric Fence

Image: LeJay "pendulum" style fence charger
http://www.pssurvival.com/PS/Electronic/Lejay_Manual_Electrical_5thed_1945_1988.pdf

Manual has electric fence controllers and windmill-generator-battery contraptions.

Ford Model T Trembler Coil
https://www.youtube.com/watch?v=tPTmSHjSu0A

LeJay Fence Charger Made From Model T Buzz Coil
https://www.youtube.com/watch?v=vBBHuJiSY6c

How To - High Voltage from Model T "Buzz Coil"
https://www.youtube.com/watch?v=4aeb125R5QE

New Zealand innovation – improved electrical components and materials

During the late 1930s, emerging public safety issues and concerns about the newly emerging electric fences were considered at length, and began to be controlled more by regulations. In the 1960s, a different New Zealand inventor named Dough Phillips patented a new type of design using capacitor discharge, thus extending the feasible deign length of the fence and at the same time reducing its cost. This was duly patented using plastic insulators for flexibility and durability (instead of the previous porcelain) and similar systems continue to be used in agricultural electric fences today. Early fence charging devices used alternating current (AC) with a transformer and a mechanically operated switch, giving long pulses and sometimes of unpredictable voltages. As might be expected, these mechanical switches frequently failed, so later systems made use of solid state (transistor) circuitry instead of manual switching components. For a period, some types of fence energisers gave longer outputs. Nicknamed ‘weed burners’, this variant became known for causing fires in hot, dry weather and it was for this reason that their popularity reduced.
.........
The early development of the modern, pulsed electric fence commenced in New Zealand in 1936 when William "Bill" Gallagher built a primitive energiser from a cars' ignition coil to keep his horse off his car. This was soon extended to a fence and progressed from there. These early fence charging devices used alternating current (AC) with a transformer and a mechanically operated switch, giving long pulses and sometimes delivered unpredictable voltages. As might be expected, these mechanical switches frequently failed and the development of using capacitors and solid state circuits by another New Zealander, Doughy Phillips, greatly improved the efficiency of the system. These were generally known as "weed burners" as they tended to burn weed growth but did cause fires on occasions.
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Further modern developments: ropes and insulators

Over recent years, there have been some significant improvements including polyethylene insulators, which last longer and are cheaper, along with the electrical design of the energizing units which are also called a fencer or energiser. Modern fence chargers use low impedance circuitry, in which a capacitor is charged by a solid-state circuit. If an animal (or a person) comes into contact with the fence, the charge is released by a thyristor. This is an electronic component which can be thought of as an automatic switch so the voltage is more controlled, and the shock pulse is much shorter – typically just a few milliseconds. Fences can be powered by batteries and solar panels; if a fence is in good condition, such batteries can last many weeks depending on fence length. Woven rope-like material containing conducting wires has also been developed. Electric fences are used primarily to stop livestock from escaping or from wandering onto farmland and damaging crops. Although the majority of electric fences today are used for animal control in this way, other applications include prisons, military bases and other protected installations. Here, the aim is to maintain security, or to stop people crossing a borderline or other physical limit. The voltage delivered can be varied and may be selected to cause discomfort or in security applications, incapacitating or lethal. Finally, probably due to their intrinsic risks, there have also been legislative changes and regulations in some countries regarding the construction and use of electric fences.

https://en.wikipedia.org/wiki/Electric_fence
http://www.farmcareuk.com/blog/history-electric-fencing/
https://www.agrisellex.co.uk/blog/history-of-electric-fencing-1832-to-2016/831
https://www.smokstak.com/forum/showthread.php?t=95985 .

EU Agriculture

24-2-1 Farmers STORM the EU - Why? - EU Made SIMPLE > .

Tuesday, October 23, 2018

Fertilizers

.Managing Sulfur For Your Crops - AgPhD > .

22-2-6 Decarbonising Ammonia production. Revolutionary new process - Just > .

.Fritz Haber - Nobel Laureate Who Killed Millions and Saved Billions - Veritasium > .

Growing plants need at least 16 nutrients to be healthy.

Primary nutrients are nitrogen, phosphorus and potassium, known by the chemical symbols of N, P and K.
Secondary nutrients are calcium, magnesium and sulfur.
Micronutrients include boron, chlorine, copper, iron, manganese, molybdenum and zinc.
Other nutrients that are easily available in the environment include carbon, hydrogen and oxygen. These last three do not need to be supplied by fertilizers.

Haber–Bosch process ..

Throughout the 19th century the demand for nitrates and ammonia for use as fertilizers and industrial feedstocks had been steadily increasing. The main source was mining niter deposits. At the beginning of the 20th century it was being predicted that these reserves could not satisfy future demands and research into new potential sources of ammonia became more important. The obvious source was atmospheric nitrogen (N2), comprising nearly 80% of the air, however N2 is exceptionally stable and will not readily react with other chemicals. Converting N2 into ammonia posed a challenge for chemists globally.

Ammonia was first manufactured using the Haber process on an industrial scale in 1913 in BASF's Oppau plant in Germany, reaching 20 tonnes per day the following year. During WW1, the production of munitions required large amounts of nitrate. The Allies had access to large sodium nitrate deposits in Chile (Chile saltpetre) controlled by British companies. Germany had no such resources, so the Haber process proved essential to the German war effort. Synthetic ammonia from the Haber process was used for the production of nitric acid, a precursor to the nitrates used in explosives.

Bones as Resource ..

During the war, nitrogen was one of the prime components of TNT and other high explosives. Post-war, munitions plants produced ammonia for fertilizer. Fertilizer use increased, partly due to enhanced supply and partly because farmers and agricultural scientists understood the importance of nutrients to crops.

Guano (bird droppings) became a popular fertilizer by 1800s. Trial and error experiments, first by farmers, later by scientists established the effectiveness of early fertilizers.

By the 1940s, plant scientists at universities and research facilities had determined the 16 essential ingredients for plant growth. The three primary nutrients—nitrogen, phosphorus and potassium—were needed in quantities approaching the millions of tons by 1940.

In the early part of the 20th Century, potassium was mined from potash deposits, the largest of which were in Germany. By 1940, new sources had been discovered in Canada, and there were chemical processes coming on line to supply potassium.

By 1940, phosphorus was also being produced by chemical processes and by mining phosphate rock. In the 1940s, the use of "normal superphosphate" fertilizers peaked. In later decades, it was replaced by triple superphosphate and ammonium phosphates.

Nitrogen production was boosted by WW2 developments. Nitrogen is, of course, one of the main ingredients in explosives.

During the 1940s, most of the ammonia was applied as solid ammonium nitrate pellets. But this form is highly explosive. In fact, ammonium nitrate mixed with fuel oil is a common explosive still used in mines. There were several disasters where the material exploded in ships or other transports.

By the mid 40s, researchers were exploring ways to apply anhydrous ammonia directly into the soil. It won't explode, but it has to be kept under pressure and usually refrigerated. It can "burn" skin by drying it severely, and it can crowd out oxygen in a closed area and even cause death by asphyxiation. But, anhydrous ammonia has the highest nutrient content of any fertilizer. It's 82.5 percent nitrogen.

https://livinghistoryfarm.org/farminginthe40s/crops_04.html .

Food - Importing vs Exporting Nations

Agricultural Futures - 21st C ..

Agricultural Geopolitics ..

Farming & Food - tb >> .

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Thursday, October 25, 2018

DfV - Dig for Victory