SNAIL FARMING

Snail farming is not a new concept. From the prehistoric age, human has been consuming snail meat because of its high rate of protein, iron, low fat, and including almost all the amino acid which is needed for human body. Basically snails originated from wild life they are considered as good food and source of nutrition. Snail farming has many kinds of benefits. If a person raise them and expects to get possible qualities, he has to care them properly. In the recent years snail farming increasing day by day and turns into a large scale from small cottage industry because of its real economic value.

Suitable Place and Soil

For snail farming an open pasture should select where suitable plants are grown for feed and shelter. Basically any kinds of shed are not used. At the time of selecting a site for snail farming the main concern should given to the prevailing wind that is essential to dry out the soil. A farmer have to concentrate to eliminate predatory insects and pests. For this reason soil analysis and ensuring growing leafy, green vegetable crops are urgent. It is said that friable soil with PH 5.8 to 7.5 and calcium contain soil is useful in this regards.

The soil structure should be light because clay soil is inappropriate for egg lying and moving. Besides, plants and snail should keep moist by night time dew, rain or collected misting. Snail can move more easily on moist, leaves and ground and that is why they can eat more and grow faster.Proper drainage system is necessary because no water should remain on ground in puddles. Rain water and collected irrigation is also important for snail farming. The place should be free from big tress so that no predatory and insects can grow and these tress give shade for the development of crops that hinders dew fall.

Size of Farm

Generally the size of a farm may be varied or depends on the category of grower. Cottage industry or the people who start from his hobby can utilize around 1000 to 2000 meters area. On the other hand, the people who start as a small business can use, average around 3000 to 10,000 squares meters area. If a farmer wants to start in a large scale, he has to take at least 2 hectors area and must increase this area with the increasing of his business up to 30 hectors.

Constructing a Snailery

There are different kinds of snailery can be built. In this regards, some factors have to take in consideration. Firstly, the snails stage of development and snails habit. The most important matter is that snailery must be an escape proof and be effective against predators and it permits easy entree to the trend snails. When a person wants to build a snailery, he must require some materials that are decay- and termite –resistant timber, such as Milicia excelsa (trade name- iroko); Nauclea diderrichii (trade name- opepe); Lophira alata (trade name – ekki), sandcrete  blocks; mosquito nets and polythene sheets. These types of materials are needed for each kinds of snailery that are mentioned below.

• Hutch boxes
• Trench pens
• Mini Paddock pens
• Moveable pens
• Free range pens
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  • Leaves: Cocoyam, kola, bokoboko, paw paw, cassava, okra, eggplant, loofa, etc.
  • Fruits: Pawpaw, mango, banana, pear, oil palm, fig tomato etc.
  • Tubers: Cocoyam, cassava, yam, sweet, potato and plantain.
  • Flowers: Oprono, odwuma and pawpaw.
  Types of Feed
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  Some studied show that A.achatina can utilize a wide range of feed items. Basically it prefers green leaves, fruits, tubers and flowers. Unlike other species it favors leaves and fruits which are separated from main plant. Snails prefer wet leaves to dry leaves. The recommended feed items are below.
  Feed Generally the most of the species of snail are vegetarian and they accept many kinds of feed. Different types of feed that is favored by the most investigated species, Achatina achatina, and the diet that is recommended to the farmers who is rearing this species, described here.
• 
  
  
  
  • Leaves: Cocoyam, kola, bokoboko, paw paw, cassava, okra, eggplant, loofa, etc.
  • Fruits: Pawpaw, mango, banana, pear, oil palm, fig tomato etc.
  • Tubers: Cocoyam, cassava, yam, sweet, potato and plantain.
  • Flowers: Oprono, odwuma and pawpaw.
  Types of Feed
  Some studied show that A.achatina can utilize a wide range of feed items. Basically it prefers green leaves, fruits, tubers and flowers. Unlike other species it favors leaves and fruits which are separated from main plant. Snails prefer wet leaves to dry leaves. The recommended feed items are below.
  Feed Generally the most of the species of snail are vegetarian and they accept many kinds of feed. Different types of feed that is favored by the most investigated species, Achatina achatina, and the diet that is recommended to the farmers who is rearing this species, described here.
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• Marketing
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  West Africa and west French are the two main areas of snails’ consumption in the world. In West Africa, Ghana, Nigeria and Cote d’Ivoire are the main markets of snails. France plays a significant role in snails’ trade. Some of the snails are imported from French and exported to the European countries or North America. Annually, the USA alone about imports $200 million worth of snails. Other markets are Germany, Belgium, Netherlands, Canada, Switzerland, Japan , Sweden, Austria, Denmark etc. and the main suppliers to these markets are Greece, Turkey, Rumania, Algeria, Tunisia etc.
• Diseases
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  It is recommended to the farmers that a hygienic environment of snails can prevent the spread of disease and improve the health and grow rate of snails. For example,   removing or replacing daily food to avoid spoilage. Farmer should add earthworms to the soil that helps to keep the pen clean and also have a concern about intestinal infections that causes for the bacterium Pseudomonas. Snails may be attacked by parasites, nematodes, trematodes, fungi, and micro arthropods when the populations of snails are dense. Careful consecrations have to for predators such as: rats, mice, moles, skunks, weasels, birds etc. NEWS FROM AROUND THE WORLD

As both public and private enterprises gear up towards a return to the Moon and the first human footsteps on the Red Planet, there is a renewed focus on keeping people alive and productive in these extreme environments. Plants, and specifically crop plants, will be a major component of proposed regenerative life-support systems as they provide food, oxygen, scrub carbon dioxide, and aid in water recycling -- all in a self-regenerating or 'bioregenerative' fashion. Without a doubt, plants are a requirement for any sufficiently long duration (time and distance wise) human space exploration mission. There has been a great deal of research in this area -- research that has not only advanced Agriculture in Space, but has resulted in a great many Earth-based advances as well (e.g., LED lighting for greenhouse and vertical farm applications; new seed potato propagation techniques, etc.)
A recent article by Dr. Raymond M. Wheeler from the NASA Kennedy Space Center, now available in open access in the journal Open Agriculture, provides an informative and comprehensive account of the various international historical and current contributions to bioregenerative life-support and the use of controlled environment agriculture for human space exploration. Covering most of the major developments of international teams, it relates some of this work to technology transfer which proves valuable here on Earth.


The idea of using plants to keep people alive and productive in space is not new, both in concept and in scientific inquiry. The article covers a large portion of the historical international research effort that will be the foundation for many of the trade studies and mission design plans for use of artificial ecosystems in space.

Research in the area started in 1950s and 60s through the works of Jack Myers and others, who studied algae for oxygen production and carbon dioxide removal for the US Air Force and the National Aeronautics and Space Administration (NASA). Studies on algal production and controlled environment agriculture were also carried out by Russian researchers in Krasnoyarsk, Siberia beginning in the 1960s including tests with human crews whose air, water, and much of their food were provided by wheat and other crops. NASA initiated its Controlled Ecological Life Support System (CELSS) Program in the early 1980s with testing focused on controlled environment production of wheat, soybean, potato, lettuce, and sweet potato. Findings from these studies paved the way to conduct tests in a 20 m2, atmospherically closed chamber located at Kennedy Space Center.


At about the same time, Japanese researchers developed a Closed Ecology Experiment Facilities (CEEF) in Aomori Prefecture to conduct closed system studies with plants, humans, animals, and waste recycling systems. CEEF had 150 m2 of plant growth area, which provided a near-complete diet along with air and water regeneration for two humans and two goats.

The European Space Agency MELiSSA Project began in the late 1980s and pursued ecological approaches for providing gas, water and materials recycling for space life support, and later expanded to include plant testing.


A Canadian research team at the University of Guelph started a research facility for space crop research in 1994. Only a few years later, they went on to develop sophisticated canopy-scale hypobaric plant production chambers for testing crops for space, and have since expanded their testing for a wide range of controlled environment agriculture topics.


Most recently, a group at Beihang University in Beijing designed, built and tested a closed life support facility (Lunar Palace 1), which included a 69 m2 agricultural module for air, water, and food production for three humans.


As a result of these international studies in space agriculture, novel technologies and findings have been produced; this includes the first use of light emitting diodes for growing crops, one of the first demonstrations of vertical agriculture, use of hydroponic approaches for subterranean crops like potato and sweet potato, crop yields that surpassed reported record field yields, the ability to quantify volatile organic compound production (e.g., ethylene) from whole crop stands, innovative approaches for controlling water delivery, approaches for processing and recycling wastes back to crop production systems, and more. The theme of agriculture for space has contributed to, and benefited from terrestrial, controlled environment agriculture and will continue to do so into the future. There are still numerous technical challenges, but plants and associated biological systems can and will be a major component of the systems that keep humans alive when we establish ourselves on the Moon, Mars and beyond.


According to Dr. Gary W. Stutte, NASA's principal investigator for several spaceflight experiments designed to grow plants in microgravity:Dr. Ray Wheeler has written a compelling and complete history of the people that have committed their careers to enabling the colonization of space. Drawing upon his deep understanding of the programs developed, people involved, and progress achieved to highlight the accomplishments and contributions of scientist and engineers around the world to bring the vision of space exploration to fruition, he details the problems, challenges, results and contributions from the programs, and reveals how they benefited Earth, as well as space. The review underscores that the answers will be achieved not through proclamation, but through collaboration between nations, cooperation between people, and sustained commitment by institutions. His article should be required reading for anyone with even a passing interest in the Space Agriculture." BY NASA.

COVER CROPS MAY BE USED TO MITIGATE AND ADAPT TO CLIMATE CHANGE.

Climate-change mitigation and adaptation may be additional, important ecosystem services provided by cover crops, said Jason Kaye, professor of soil biogeochemistry in the College of Agricultural Sciences. He suggested that the climate-change mitigation potential of cover crops is significant, comparable to other practices, such as no-till.

"Many people have been promoting no-till as a climate-mitigation tool, so finding that cover crops are comparable to no-till means there is another valuable tool in the toolbox for agricultural climate mitigation," he said.

In a recent issue of Agronomy for Sustainable Development -- the official journal of the French National Institute for Agricultural Research, Europe's top agricultural research institute and the world's number two center for the agricultural sciences -- Kaye contends that cover cropping can be an adaptive management tool to maintain yields and minimize nitrogen losses as the climate warms.
Collaborating with Miguel Quemada in the Department of Agriculture Production at the Technical University of Madrid in Spain, Kaye reviewed cover-cropping initiatives in Pennsylvania and central Spain. He said that lessons learned from cover cropping in those contrasting regions show that the strategy has merit in a warming world.

The researchers concluded that cover-crop effects on greenhouse-gas fluxes typically mitigate warming by 100-150 grams of carbon per square meter per year, which is comparable to, and perhaps higher than, mitigation from transitioning to no-till. The key ways that cover crops mitigate climate change from greenhouse-gas fluxes are by increasing soil carbon sequestration and reducing fertilizer use after legume cover crops.

"Perhaps most significant, the surface albedo change -- the proportion of energy from sunlight reflecting off of farm fields due to cover cropping -- calculated for the first time in our review using case-study sites in central Spain and Pennsylvania, may mitigate 12 to 46 grams of carbon per square meter per year over a 100-year time horizon," Kaye wrote.

"Cover crop management also can enable climate-change adaptation at these case-study sites, especially through reduced vulnerability to erosion from extreme rain events, increased soil-water management options during droughts or periods of soil saturation, and retention of nitrogen mineralized due to warming," he said.

Despite the benefits, Kaye is not necessarily advocating that cover crops be planted primarily for the purposes of climate-change mitigation or adaptation. Instead, he thinks the most important conclusion from his analysis is that there appear to be few compromises between traditional benefits of cover cropping and the benefits for climate change.

"Farmers and policymakers can expect cover cropping simultaneously to benefit soil quality, water quality and climate-change adaptation and mitigation," he wrote.
"Overall, we found very few tradeoffs between cover cropping and climate-change mitigation and adaptation, suggesting that ecosystem services that are traditionally expected from cover cropping can be promoted synergistically with services related to climate change. NEWS FROM AROUND THE WORLD.

SCIENTISTS DISCOVER GENE THAT INFLUENCES GRAIN YIELD.

In a paper published April 18, 2017, in Nature Plants, a team led by Thomas Brutnell, Ph.D. Director of the Enterprise Institute for Renewable Fuels at the Danforth Center and researchers at the U.S. Department of Energy Joint Genome Institute (DOE JGI), a DOE Office of Science User Facility, conducted genetic screens to identify genes that may play a role in flower development on the panicle of green foxtail. Green foxtail is a wild relative of the common crop foxtail millet. These Setaria species are related to several candidate bioenergy grasses including switchgrass and Miscanthus and serve as grass model systems to study grasses that photosynthetically fix carbon from CO₂ through a water-conserving (C₄) pathway. The genomes of both green foxtail and foxtail millet have been sequenced and annotated through the DOE JGI's Community Science Program.


"We have identified four recessive mutants that lead to reduced and uneven flower clusters," said Pu Huang, Ph.D., the lead author of the paper. "By ultimately identifying the gene in green foxtail we identified a new determinant in the control of grain yield that could be crucial to improving food crops like maize."


The grass Setaria has been proposed as a model for food and bioenergy crops for its short stature and rapid life cycle, compared to most bioenergy grasses. After constructing a mutant population resource for the grass, the Brutnell lab screened 2,700 M2 families, deep sequenced a mutant pool to identify the causative mutation and confirmed a homologous gene in maize played a similar role.
"Identifying this new player in panicle architecture may enable the design of plants with either enhanced or reduced panicle structures," stated Brutnell. "For instance, maize breeding has selected for reduced male panicles, also known as tassels, to reduce shading in the field while still producing sufficient pollen. However, grain yields in sorghum are directly related to the architecture of the panicle. By showing that this gene influences panicle architecture in Setaria and maize, we have expanded the tool box for breeders."


At the Danforth Center, plants hold the key to discoveries and products that will enrich and restore both the environment and the lives of people around the globe. Brutnell's lab research includes the search for the next generation of biofuels: alternative sources of energy that are affordable, sustainable and ecologically sound. The research develops novel computational tools and model systems to identify genes that will improve yield in crops through enhanced photosynthesis. BY DONALD DANFORTH.