Ornamental Gardens

Last updated

Ornamental Gardens
Ornamental Gardens, Ottawa - Aerial view.jpg
Ariel of the Ornamental Gardens
Address75 National Capital Commission Scenic Driveway, Ottawa, On K1a 0z2, Canada
LocationOttawa, Ontario, Canada
Hours7 am-9pm
Phone Number(613) 230-3276
Governing BodyAgriculture and Agri-Food Canada
National Historic Site of Canada
Agriculture and Agri-Food Canada.png

The Ornamental Gardens are an agricultural facility that emphasizes research, education, and beauty as part of Agriculture and Agri-Food Canada's Central Experimental Farm. As the name indicates, the gardens are centrally located in and now surrounded by the city of Ottawa, Ontario, Canada. The 8-acre (3.2 Ha) garden is a National Historic Site and Cultural Heritage Landscape. [1]

Contents

The original intent was to be used as a test facility for the development of winter hardy roses, weigela and peonies. [2] The Gardens now act as the steward to several large collections of ornamental plants. While research is still conducted, the park-like atmosphere has become an important place of recreation and education for the residents of Ottawa.

The Ornamental Gardens are bordered by Prince of Wales Drive to the South-East, National Capital Commission Scenic Driveway to the North-West, and the Research Fields to the South-West.

History

The site of the Ornamental Gardens in 1886, in what gave Williams Saunders vision for the future of the Experimental Farm Growing the Gardens.png
The site of the Ornamental Gardens in 1886, in what gave Williams Saunders vision for the future of the Experimental Farm

The Central Experimental Farm was one of five experimental farms developed across Canada to help and adjust climates, soil and land that was new to them. On June 2, 1886, the federal government was awarded authority in an act of Parliament to proceed with the system of research farms. [3]

The current site of the Central Experimental Farm was founded in 1886 from a site of near wilderness sprinkled with stumps and stones across 140 acres. William Saunders was appointed the first Farm director, and at the age of 62 in October 1886, he paved the way to carve out 20 acres of field, with visions for the future amongst his passion for flowers. [4]

The current William Saunders Building at the Central Experimental Farm William Saunders Building.JPG
The current William Saunders Building at the Central Experimental Farm

With newly appointed horticulturalist William T. Macoun, the first flower garden was located on the main campus lawn adjacent from Saunders residence (the current William Saunders Building). This started Saunders plans for the garden from 12-years prior to develop the forest to a modern example of the current ornamental gardens. [4]

After 25 years as Director of the Experimental Farm, Saunders appointed Hans T. Gussow on January 1, 1911. Where he believed "a true botanical (ornamental) garden should be for purposes of economic application and scientific study". [4]

By 1920, the Central Experimental Farm and the Ornamental Gardens had Isabella Preston forming new roots. On September 9, 1922, she was made a permanent specialist in ornamental horticulture where she would cultivate new plants for Canadian gardens and building an international reputation for the Central Experimental Farm. [5]

Working on the property of the current Ornamental Gardens Volunteers at the Ornamental Gardens at the Farm, Ottawa (19443416670).jpg
Working on the property of the current Ornamental Gardens

There have been multiple phases to modern-day development of the property due to primary research, education and landscape. [4] These changes have undergone physical movements, redesigns, expansions, neglections, restorations, and rebuilds. [4] Recently AAFC Staff and volunteers have restored the rose, peony, lilac and iris collections, in which were designed to honour the work of Ottawa's Isabella Preston and Felicitas Svejda. [4] As since the 1890s, the Ornamental Gardens have been displaying historical and new varieties of flowers and shrubs. [6]

Features

Simplified map of the Central Experimental Farm attractions Map of Farm Attractions.jpg
Simplified map of the Central Experimental Farm attractions

The Ornamental Gardens are currently one of five public areas associated with the Central Experimental farm. [7] These include the Dominion Arboretum, Tropical Greenhouses, Merivale Shelterbelt, and the Canada Agriculture and Food Museum.

In order to provide a proper environment for the many plant collections the Ornamental Gardens has been subdivided into several features ranging from important buildings, collections, series and memorials.

Additionally, for support of the public, there is a public washroom available for all members of the public located at building 85 of the Central Experimental farm in which is adjacent to the National Capital Commission Driveway.

Map outlining different sections of the Ornamental Gardens Ornamental Gardens Map.png
Map outlining different sections of the Ornamental Gardens

Major features

Notable buildings

  1. Building 49: William Saunders Building
  2. Building 50: Historical Greenhouse Complex
  3. Building 55: Horticulture Building
  4. Building 75: Cereal Crops Building
    • Composed of a laboratory with a greenhouse to the rear that has been contributed to the Central Experimental Farm's agriculture science since 1889. [8]
  5. Building 77: Potting Shed
    • The shingled, flared roof and cross-gable roof is recognized as a Federal Heritage Building as it worked to promote the Central Experimental Farm's agriculture reform in the 19th century. [9]

Collections

The display garden for the AAS (All American Selection) of the Ornamental Gardens presents a yearly, dynamic display of the annuals and perennials as well as is home to its five primary collections. The lilacs, heritage roses, peonies, explorer roses, and irises and daylilies.

Lilacs

Located near the Lilac series collection and building 77 of the Ornamental Gardens POV of Ornamnetal Gardens.jpg
Located near the Lilac series collection and building 77 of the Ornamental Gardens

Amongst the first plantings on the Central Experimental Farm grounds were 15 lilacs, despite having been first introduced in the Dominion Arboretum. [10] By 1919, the lilacs were moved into the Ornamental Gardens to create the lilac walks currently open for viewing with over 340 lilacs encompassing 262 variations. [11] In 1982, under presentation and cultivation of the lilacs, Agriculture and Agri-Food Canada was awarded from the International Lilac Society for its lilac cultivators and educating the public on the beauty and use of lilacs. [10]

Heritage roses

Under William Saunders, the first roses were established in 1886, and by 1895 there was a published list of “desirable” roses. [12] Years were spent testing and cultivating for perfectly formed varieties. Cultivation was led by rose breeders for over 90 years from supervision under William Saunders to Isabella Preston. [12] The Heritage Rose Garden was considered a millennium project of rectangular beds containing once-only blooming roses and containt repeat bloomers. [6]

Peonies

The Peony Garden was redesigned in 2001 and currently consists of 12 garden beds with more than 600 peonies. [13] William Saunders first introduced peonies in the 1890s, as his son A.P. Saunders was a influential peony breeder, who cultivated the 'Saunders Hybrids'. [6] This collection has become the largest collection of peonies in North America. [6]

Explorer roses

Agriculture and Agri-Food Canada began a rose breeding program in the 1960s under Felicitas Svejda. This program would develop the Explorer series, that is a set of hardy roses variations developed to withstand the harsh Canadian climates, particularly with the ability to survive in -35 °C when snow-covered. [14] Svejda was successfully involved in the first thirteen cultivars, in which would be named after Canadian explorers in hopes of proving they were as 'tough and versatile as their namesakes'. [14] This would develop the Explorer Rose garden, as a Canadian-made collection and one of Agriculture and Agri-Food Canada's most impressive horticultural success stories. [15] The collection was officially opened in July 2005, and current AAFC staff and a dedicated team of volunteers have combined the original collection from the original bushes with more recent varieties for improved displays. [15]

Irises and daylilies

There are 14 separate garden beds that form concentric circles, with four corners squaring the pattern. In the inner circle and four corners there is presence of Siberian Irises, the middle circle contains Bearded Irises, while the outer circle contains daylilies. [16] This area was designed in 2003, by former AAFC Lead Hand Sharon Saunders to form a Victorian-style garden that represents the varied forms of colours of daylilies. [6]

Perennials

Perennials are hardy, herbaceous plants that can survive year around because of there underground organs that enter a state of dormancy during autumn months. [17] These plants are a value to sustainable agriculture, as the field of horticulture provides technologies to improve the yields of plant growth. [18] The ability for annual growth promotes weed control and improved soil health and biodiversity with the reduction in fertilizer usage. [19]

Mineral composition

The horticulture industry is more than continuous growth and development of plants. Every chosen species in an environment has its own chemical composition. The Ornamental Gardens show presence of agrominerals, in which demonstrate mineral substance mixtures of mineral and organic substances. The dominant chemical composition facilitated in the garden is concentrations of three vital macronutrients for plant growth, consisting of nitrogen, potassium, and phosphorus.

Nitrogen

Nitrogen is an essential macronutrient for plants, that determines development and productivity through variations of abiotic stress responses. [20] Agriculture and Agri-Food Canada follows a continuous process, that begins with preparation in the Tropical Greenhouses at the Central Experimental Farm during the spring months. A series of chosen annuals are pricked and seeded and into garden pots containing Pro-Mix Potting Soil.

Pro-Mix potting soil

White appearance gives evidence of Nitrogen Pro-Mix Potting Soil.jpg
White appearance gives evidence of Nitrogen

Pro-Mix potting soil is a starter fertilizer that contains 7% total nitrogen to help plants acclimate to a new rooting system. [21] Nitrogen is a fundamental mineral in soil for plant health, and is critical to plants' growth and reproduction. [22] Usage provides an increase in nutrient and water uptake because of the symbiotic relationship and stimulation of fungi that colonizes the root tissue. [23] This leads to a better integration of moisture management with a larger root system that causes an increased plant growth capacity. [24]

Nitrogen-fixing plants

Nitrogen-fixing plants located in the Ornamental Gardens are present in the forms of clover and alfalfa. These plants are a natural way to increase nitrogen content in soil. The roots of the plants colonize to extract nitrogen from the air and turn into nitrogen for bacterial growth, and once the bacteria no longer require the nitrogen it becomes available to all plants. [25]

Clover

Clover is a perennial plant that has the potential to produce 50-200 Ibs/acre of fixed nitrogen. [26] In essence the clover supplies carbohydrates to the root nodules and used to convert atmospheric nitrogen into a form utilized by a plant to benefit grasses through transfer in soil. [27]

Phosphorus

Phosphorus is the second most frequent macronutrient behind nitrogen. [28] In which makes up 0.2% of a plant's dry weight, with essential components of nucleic acids, phospholipids, and adenosine triphosphate (ATP) to present a reliable supply to control key enzyme reactions and regulation of metabolic pathways. [28] Substances work to correlate and intertwine to initiate greater outcomes. Phosphorus promotes nitrogen uptake by enhancing nitrogen retention in ecosystems. [29] The principle of regulating phosphorus is essential for cell division and development of growing plants. [30] Improvement allows a greater capacity for plants to capture, store and convert sunlight energy to biochemicals like ATP. [30]

Predominant for perennials, as can increase yield and stand longevity. [31] Where the usage of phosphorus provides the ability to increase and improve plant water use and other nutrients efficiencies. Plant roots can only acquire phosphorus from the soil when the phosphorus is dissolved in soil water. [32]

Potassium

Potassium is relatively abundant in the earth's crust making up approximately 2.1% of the weight and is mined in the form of potash, sylvite, carnallite, and langbeinite. [33] This is a necessity for the function of all living cells as potassium becomes a vital macronutrient that increases root function and improves drought resistance. [34] Plant survival with potassium usage has a responsibility of vital enzymes activating and regulating the water balance and uptake while protecting and mitigating abiotic induced stresses to maintain homeostasis. [35]

These measures are crucial as it demonstrates the importance of photosynthesis. There are responses to light, as the use of potassium regulates the opening of the stomata that in such regulates the uptake of CO2. [33] Potassium uptake is dependent on adenosine triphosphate (ATP) as it provides energy for chemical and physiological processes while facilitating protein and starch synthesis in plants. [33]

Usage of potassium in modern gardens and landscaping is present in the Ornamental Gardens through the natural process of filtration through constant grass clippings in which provide the soil with nutrients that contribute to preventing weed growth while preserving moisture. [36]

See also

Related Research Articles

<span class="mw-page-title-main">Fertilizer</span> Substance added to soils to supply plant nutrients for a better growth

A fertilizer or fertiliser is any material of natural or synthetic origin that is applied to soil or to plant tissues to supply plant nutrients. Fertilizers may be distinct from liming materials or other non-nutrient soil amendments. Many sources of fertilizer exist, both natural and industrially produced. For most modern agricultural practices, fertilization focuses on three main macro nutrients: nitrogen (N), phosphorus (P), and potassium (K) with occasional addition of supplements like rock flour for micronutrients. Farmers apply these fertilizers in a variety of ways: through dry or pelletized or liquid application processes, using large agricultural equipment, or hand-tool methods.

<span class="mw-page-title-main">Plant nutrition</span> Study of the chemical elements and compounds necessary for normal plant life

Plant nutrition is the study of the chemical elements and compounds necessary for plant growth and reproduction, plant metabolism and their external supply. In its absence the plant is unable to complete a normal life cycle, or that the element is part of some essential plant constituent or metabolite. This is in accordance with Justus von Liebig's law of the minimum. The total essential plant nutrients include seventeen different elements: carbon, oxygen and hydrogen which are absorbed from the air, whereas other nutrients including nitrogen are typically obtained from the soil.

Agriculture and Agri-Food Canada is the department of the Government of Canada responsible for the federal regulation of agriculture, including policies governing the production, processing, and marketing of all farm, food, and agri-based products. Agriculture in Canada is a shared jurisdiction and the department works with the provinces and territories in the development and delivery of policies and programs.

<span class="mw-page-title-main">Soil fertility</span> The ability of a soil to sustain agricultural plant growth

Soil fertility refers to the ability of soil to sustain agricultural plant growth, i.e. to provide plant habitat and result in sustained and consistent yields of high quality. It also refers to the soil's ability to supply plant/crop nutrients in the right quantities and qualities over a sustained period of time. A fertile soil has the following properties:

The Mizzou Botanic Garden contains thousands of plants within the campus of the University of Missouri in Columbia, Missouri, United States. The Garden includes famous icons, such as Thomas Jefferson's original grave marker and the Columns of Academic Hall, and is open year-round, only asking for a small donation to visit.

<span class="mw-page-title-main">Organic fertilizer</span> Fertilizer developed from natural processes

Organic fertilizers are fertilizers that are naturally produced. Fertilizers are materials that can be added to soil or plants, in order to provide nutrients and sustain growth. Typical organic fertilizers include all animal waste including meat processing waste, manure, slurry, and guano; plus plant based fertilizers such as compost; and biosolids. Inorganic "organic fertilizers" include minerals and ash. Organic refers to the Principles of Organic Agriculture, which determines whether a fertilizer can be used for commercial organic agriculture, not whether the fertilizer consists of organic compounds.

Agrogeology is the study of the origins of minerals known as agrominerals and their applications. These minerals are of importance to farming and horticulture, especially with regard to soil fertility and fertilizer components. These minerals are usually essential plant nutrients. Agrogeology can also be defined as the application of geology to problems in agriculture, particularly in reference to soil productivity and health. This field is a combination of a few different fields, including geology, soil science, agronomy, and chemistry. The overall objective is to advance agricultural production by using geological resources to improve chemical and physical aspects of soil.

<span class="mw-page-title-main">Central Experimental Farm</span> Government-owned farm and research facility in Ottawa, Ontario

The Central Experimental Farm (CEF), commonly known as the Experimental Farm, is an agricultural facility, working farm, and research centre of the Science and Technology Branch, formerly the Research Branch, of Agriculture and Agri-Food Canada. As the name indicates, this farm is centrally located in and now surrounded by the City of Ottawa, Ontario, Canada. Located on 4 square kilometres (1.5 sq mi) of land, the farm is a National Historic Site of Canada and most buildings are protected and preserved as heritage buildings.

<span class="mw-page-title-main">Dominion Arboretum</span> Arboretum in Ottawa, Ontario

The Dominion Arboretum is an arboretum part of the Central Experimental Farm of Agriculture and Agri-Food Canada in Ottawa, Ontario, Canada. Originally begun in 1889, the Arboretum covers about 26 hectares of rolling land between Prince of Wales Drive, Dow's Lake and the Rideau Canal. Carleton University is located at the opposite side of the Canal. At a latitude of 45°, it can experience extremely hot and humid summers and extremely cold winters.

<i>Ulmus</i> × <i>hollandica</i> Belgica Elm cultivar

The hybrid elm cultivar Ulmus × hollandica 'Belgica', one of a number of hybrids arising from the crossing of Wych Elm with a variety of Field Elm, was reputedly raised in the nurseries of the Abbey of the Dunes, Veurne, in 1694. Popular throughout Belgium and the Netherlands in the 19th century both as an ornamental and as a shelter-belt tree, it was the 'Hollandse iep' in these countries, as distinct from the tree known as 'Dutch Elm' in Great Britain and Ireland since the 17th century: Ulmus × hollandica 'Major'. In Francophone Belgium it was known as orme gras de Malines.

The putative hybrid elm cultivar Ulmus × hollandica 'Dovaei', or Doué elm, was raised by the André Leroy nursery at Angers, France, as Ulmus dovaei before 1868. The Baudriller nursery of Angers marketed it as Ulmus Dowei, "orme de Doué", suggesting a link with the royal nurseries at nearby Doué-la-Fontaine, which stocked elm. Kew Gardens and Clibrans' nursery determined it an Ulmus × hollandica, though Green considered it a form of wych.

Microbial inoculants, also known as soil inoculants or bioinoculants, are agricultural amendments that use beneficial rhizosphericic or endophytic microbes to promote plant health. Many of the microbes involved form symbiotic relationships with the target crops where both parties benefit (mutualism). While microbial inoculants are applied to improve plant nutrition, they can also be used to promote plant growth by stimulating plant hormone production. Although bacterial and fungal inoculants are common, inoculation with archaea to promote plant growth is being increasingly studied.

<span class="mw-page-title-main">Wojsławice Arboretum</span>

Wojsławice Arboretum is an arboretum, located in Wojsławice, Dzierżoniów County, Lower Silesian Voivodeship, in south-western Poland. It occupies an area of 62 ha.

<i>Ptilotus exaltatus</i> Species of plant

Ptilotus exaltatus, more commonly known as pink mulla mulla, is an erect annual herb endemic to large parts of arid and semi-arid Australia. It grows throughout most areas of Australia except the Nullarbor Plain, occurring geographically above a line drawn from Perth to Esperance. The species was first observed and described in 1810, and comprehensively catalogued in 1971.

Isabella Preston was a horticulturist and public servant widely recognized for her achievements in plant hybridization and extensive work in ornamental plant breeding. She is Canada’s first female professional plant breeder. During her 26-year career, she produced nearly 200 new hardy hybrids of lily, lilac, crab apple, iris and rose plants for Canada's cold climate. While female plant breeders were rather rare in her day, she quietly challenged gender bias and set the stage for new generations of breeding programs at the Central Experimental Farm in Ottawa, Ontario, Canada and elsewhere.

Felicitas Svejda was a federal scientist in Canada who developed roses that could survive Canada's short growing season and bitter winter conditions. She led the rose-breeding program at the Central Experimental Farm in Ottawa, Ontario, Canada for nearly 25 years. She developed the Explorer Rose Series named in honour of Canadian explorers. Many of her roses also thrive in Finland, Russia, Iceland, Germany and Austria.

Seventeen elements or nutrients are essential for plant growth and reproduction. They are carbon (C), hydrogen (H), oxygen (O), nitrogen (N), phosphorus (P), potassium (K), sulfur (S), calcium (Ca), magnesium (Mg), iron (Fe), boron (B), manganese (Mn), copper (Cu), zinc (Zn), molybdenum (Mo), nickel (Ni) and chlorine (Cl). Nutrients required for plants to complete their life cycle are considered essential nutrients. Nutrients that enhance the growth of plants but are not necessary to complete the plant's life cycle are considered non-essential, although some of them, such as silicon (Si), have been shown to improve nutrent availability, hence the use of stinging nettle and horsetail macerations in Biodynamic agriculture. With the exception of carbon, hydrogen and oxygen, which are supplied by carbon dioxide and water, and nitrogen, provided through nitrogen fixation, the nutrients derive originally from the mineral component of the soil. The Law of the Minimum expresses that when the available form of a nutrient is not in enough proportion in the soil solution, then other nutrients cannot be taken up at an optimum rate by a plant. A particular nutrient ratio of the soil solution is thus mandatory for optimizing plant growth, a value which might differ from nutrient ratios calculated from plant composition.

<i>Rosa</i> Jens Munk Medium pink Hybrid Rugosa rose cultivar

Rosa 'Jens Munk' is a medium pink, Hybrid Rugosa cultivar, bred by Canadian rose breeder, Felicitas Svejda in 1964. It was introduced in Canada in 1979 by Agriculture and Agri-Food Canada. Named for the Norwegian explorer, Jens Munk, who explored the Northwest Passage in 1619, it is one of the Canadian Explorer roses that Svejda developed and named in honour of legendary Canadian explorers.

<i>Rosa</i> John Davis Pink Hybrid Kordesii rose cultivar

Rosa 'John Davis' is a pink Hybrid Kordesii rose cultivar, bred by Canadian rose breeder Felicitas Svejda. It was introduced in Canada in 1977 by Agriculture and Agri-Food Canada. It is considered to be best of the early Canadian Explorer roses that Svejda developed and named in honour of legendary Canadian explorers.

<i>Rosa</i> William Baffin Pink Hybrid Kordesii rose cultivar

Rosa 'William Baffin' is a deep pink Hybrid Kordesii rose cultivar, bred by Canadian rose breeder, Felicitas Svejda in 1974. It was introduced in Canada in 1983 by Agriculture and Agri-Food Canada. It is one of the hardiest of the Canadian Explorer roses that Svejda developed and named in honour of legendary Canadian explorers.

References

  1. Bldg. 72, Friends of the Farm; Arboretum. "About the Farm – Friends of the Central Experimental Farm" . Retrieved April 5, 2024.{{cite web}}: CS1 maint: numeric names: authors list (link)
  2. "Must-visit gardens, nurseries, greenhouses and flower festivals in and around Ottawa - Ottawa Road Trips". May 27, 2021. Retrieved March 1, 2024.
  3. "Blooms - An illustrated History of the Ornamental Gardens at Ottawa's Central Experimental Farm by Alison Hall - Issuu". issuu.com. November 8, 2016. Retrieved April 5, 2024.
  4. 1 2 3 4 5 6 "Blooms - An illustrated History of the Ornamental Gardens at Ottawa's Central Experimental Farm by Alison Hall - Issuu". issuu.com. November 8, 2016. Retrieved March 7, 2024.
  5. "Blooms - An illustrated History of the Ornamental Gardens at Ottawa's Central Experimental Farm by Alison Hall - Issuu". issuu.com. November 8, 2016. Retrieved April 7, 2024.
  6. 1 2 3 4 5 "Guide to the Ornamental Gardens at the Central Experimental Farm" (PDF). Friends of the Farm. Friends of the Central Experimental Farm. July 21, 2021. Archived (PDF) from the original on April 5, 2024. Retrieved September 19, 2024.
  7. Bldg. 72, Friends of the Farm; Arboretum. "Attractions – Friends of the Central Experimental Farm" . Retrieved March 1, 2024.{{cite web}}: CS1 maint: numeric names: authors list (link)
  8. "Cereal Crops Building #75". Parks Canada Directory of Federal Heritage Designations. Archived from the original on June 9, 2024. Retrieved September 19, 2024.
  9. "Potting Shed #77". Parks Canada Directory of Federal Heritage Designations. Archived from the original on June 8, 2024. Retrieved September 19, 2024.
  10. 1 2 "Lilacs at the Gardens & Arboretum". friendsofthefarm.ca. Retrieved March 15, 2024.
  11. Anstey, T. H. (1986). One hundred harvests : Research Branch, Agriculture Canada, 1886-1986. Agriculture and Agri-Food Canada – Agriculture et Agroalimentaire Canada. Ottawa : The Branch. ISBN   978-0-660-12036-2.
  12. 1 2 Bldg. 72, Friends of the Farm; Arboretum. "Heritage Rose Garden – Friends of the Central Experimental Farm" . Retrieved March 15, 2024.{{cite web}}: CS1 maint: numeric names: authors list (link)
  13. "Introduction to the Peonies at the Central Experimental Farm". peonies.friendsofthefarm.ca. Retrieved March 15, 2024.
  14. 1 2 Nault, Jennifer (April 30, 2016). "The Explorers' Garden". Canada's History. Canada's History Society. Archived from the original on September 19, 2024. Retrieved September 19, 2024.
  15. 1 2 "Gardens & Arboretum, Explorer Roses". explorer-roses.friendsofthefarm.ca. Retrieved March 8, 2024.
  16. "Iris & Daylily Garden at the Ornamental Gardens". irises-and-daylilies.friendsofthefarm.ca. Retrieved March 15, 2024.
  17. Bldg. 72, Friends of the Farm; Arboretum. "Perennials – Expanded! – Friends of the Central Experimental Farm" . Retrieved March 15, 2024.{{cite web}}: CS1 maint: numeric names: authors list (link)
  18. "Horticulture vs. Agriculture". Unity Environmental University. Retrieved March 15, 2024.
  19. Chapman, Elizabeth A.; Thomsen, Hanne Cecilie; Tulloch, Sophia; Correia, Pedro M. P.; Luo, Guangbin; Najafi, Javad; DeHaan, Lee R.; Crews, Timothy E.; Olsson, Lennart; Lundquist, Per-Olof; Westerbergh, Anna; Pedas, Pai Rosager; Knudsen, Søren; Palmgren, Michael (2022). "Perennials as Future Grain Crops: Opportunities and Challenges". Frontiers in Plant Science. 13. doi: 10.3389/fpls.2022.898769 . ISSN   1664-462X. PMC   9372509 . PMID   35968139.
  20. Ye, Jia Yuan; Tian, Wen Hao; Jin, Chong Wei (December 2022). "Nitrogen in plants: from nutrition to the modulation of abiotic stress adaptation". Stress Biology. 2 (1): 4. Bibcode:2022StBio...2....4Y. doi:10.1007/s44154-021-00030-1. ISSN   2731-0450. PMC   10441927 . PMID   37676383.
  21. "Discover the Benefits of PRO-MIX Soil for Perfect Gardening! - Green Packs". greenpacks.org. Retrieved March 15, 2024.
  22. "PRO-MIX Gardening | BRING YOUR GARDEN TO LIFE". www.promixgardening.com. Retrieved March 1, 2024.
  23. "ProMix soil review for optimal gardening 🌱 🔍 Find out if it's the right choice for you". November 5, 2017. Retrieved March 15, 2024.
  24. "PRO-MIX Gardening | BRING YOUR GARDEN TO LIFE". www.promixgardening.com. Retrieved March 15, 2024.
  25. "8 Ways to Add Nitrogen to Your Soil". The Spruce. Retrieved April 3, 2024.
  26. Jennings, John. "Value of Nitrogen Fixation From Clovers and Other Legumes" (PDF). UofA Division of Agriculture Research and Extension.
  27. "Nitrogen Fixing Clovers: A Sustainable Fertiliser Alternative". Germinal NZ. Retrieved April 3, 2024.
  28. 1 2 Schachtman, Daniel P.; Reid, Robert J.; Ayling, S.M. (February 1, 1998). "Phosphorus Uptake by Plants: From Soil to Cell". Plant Physiology. 116 (2): 447–453. doi:10.1104/pp.116.2.447. Archived from the original on September 19, 2024. Retrieved September 19, 2024.
  29. Shiting, Xia (August 2023). "Science Direct". Applied Soil Ecology. 188. doi:10.1016/j.apsoil.2023.104927 . Retrieved March 1, 2024.
  30. 1 2 McFly, Team. "Benefits of Phosphorus For Your Garden Plants". lawnfly.com. Retrieved March 1, 2024.
  31. Lissbrant, Sofia; Berg, W. Kess; Volenec, Jeffrey; Brouder, Sylvie; Joern, Brad; Cunningham, Suzanne; Johnson, Keith (March 2009). "Phosphorus and Potassium Fertilization of Alfalfa" (PDF). Purdue Extension. Purdue University. Archived (PDF) from the original on September 19, 2024.
  32. Harman, Brett (2017). "The Major Role of Phosphorus in Plant Growth and Productivity". IFA. Archived from the original on September 19, 2024. Retrieved September 19, 2024.
  33. 1 2 3 "What's the Function of Potassium (K) in Plants?". Greenway Biotech, Inc. Retrieved April 5, 2024.
  34. "The Role Of Potassium In The Garden". MIgardener. January 1, 2015. Retrieved March 22, 2024.
  35. Johnson, Riya; Vishwakarma, Kanchan; Hossen, Md. Shahadat; Kumar, Vinod; Shackira, A. M.; Puthur, Jos T.; Abdi, Gholamreza; Sarraf, Mohammad; Hasanuzzaman, Mirza (February 1, 2022). "Potassium in plants: Growth regulation, signaling, and environmental stress tolerance". Plant Physiology and Biochemistry. 172: 56–69. doi:10.1016/j.plaphy.2022.01.001. ISSN   0981-9428. PMID   35032888.
  36. Nielsen, Lorin (July 18, 2023). "How to Use Grass Clippings in the Garden". Epic Gardening. Archived from the original on September 19, 2024. Retrieved September 19, 2024.

45°23′21″N75°42′28″W / 45.38917°N 75.70778°W / 45.38917; -75.70778