Research Library

Grafting is a proven way to incorporate disease resistance into tomato transplants. However adoption of this practice to high tunnel production is relatively new, so these four growers were curious about the economic viability of grafting tomatoes for production in high tunnels in southern Ontario.

Key Findings

• Grafted tomatoes had greater total marketable yield regardless of scion variety.
• Grafted tomatoes had greater overall plant health.
• Grafted tomatoes had higher net returns on average but the degree of economic benefit varied by farm.
• Yield advantage for grafting likely depends on scion variety and scion and rootstock compatibility.

Duane would like to breed a pea that can be planted in the fall and yield early peas, before the heat and drought set in. He’d like to see early production of high quality peas to supply market gardeners and backyard gardeners without the struggles of early spring planting.

 Progress to Date

• This breeding project should take 3-5 years to get uniform lines with the combined traits of winter hardiness and quality, which are both complex traits.
• Varieties derived from this project will be released publicly as per the Breeders Pledge (below).
• If deemed commercially viable, the resulting varieties will also be licensed to small seed companies.

Garlic on small organic farms is typically either dry mulched (e.g. straw) or grown in bare soil and cultivated for weed control. Farmers would like to see the soil covered to prevent erosion, increase water retention, and improve soil nutrition. However, water retention could increase nematode pressure and green mulches could compete with garlic. Heather wanted to see if there was a difference in yields of garlic when white

Part of a multi-farm trial on five farms asking the research question: Do spring planted cover crops benefit the production of late season brassica cash crops?

Summary

• Organic vegetable growers use cover crops to improve soil fertility and tilth and control weeds.
• Five growers evaluated summer cover crops to determine benefits to N-demanding late season brassicas.
• Specific cover crop comparisons included bell/fava bean (legume) vs. no cover crop control; cocktails containing a legume (bell/fava bean, peas, white clover) vs. buckwheat control.

Key Findings

• Dry conditions in the spring impeded germination resulting in “lacklustre growth [that was] not nearly competitive
  enough to deter weeds” or mature enough to effectively mow, resulting in very little meaningful cover crop or
  brassicas yield data.
•  Buckwheat came up better than other species, making it the most drought tolerant of the species grown; at
  Angie’s, buckwheat had 6+ times greater biomass than the oats/peas/fava cocktail (P<0.01).

Joseph and Jazmin compared organic sprays for managing disease in their young orchard, with the goal of discovering the best organic approach to care for their black walnuts.

Key Findings

• Disease and insect pressure was low on the young trees measured this year.
• While there was no statistical difference between the two treatments (neem oil vs copper and biological insecticide). They will continue measurements for a second year.
• The most significant indicator of fungal infection is early defoliation in the fall. Therefore, observations next year at the end of the season could strengthen their overall conclusions.

Productive pastures are paramount to organic grass-fed, grass-finished beef operations, especially when soil health and regeneration are also important farm goals. To try to further regenerate specific areas of his rotationally-grazed pastures, Tony tested whether addressing micronutrient deficiencies would help pasture growth.

From 2019 to 2021, Kim used white and pink Cosmos flowers to test isolation distances of 400 ft and 600 ft.

In a Nutshell

• Kim observed off-type colours at 400 ft for Purity (white) and Rubenza (pink) Cosmos
• Kim observed off-type colours at 600 ft for Purity (white) Cosmos

Garlic on small organic farms is typically either dry mulched (e.g. straw) or grown in bare soil and cultivated for weed control. Farmers would like to see the soil covered to prevent erosion, increase water retention, and improve soil nutrition. However, water retention could increase nematode pressure and green mulches could compete with garlic. Ken set out to see if there was a difference in yield of marketable garlic between cultivation and spring mulches.

As demand for sweet potatoes grows in Canada, breeders are working to create sweet potatoes that are adapted to eastern Ontario. In the first year of the project, Kate selected sweet potatoes that are best suited for low input, organic systems in eastern Ontario.

Progress to Date

• Kate evaluated nearly 60 genetically unique and
  diverse sweet potato tubers.
• After final evaluations of taste and storability, Kate
  will choose 15 varieties and trial them in 2020.
• Kate collected seeds from the vines that produced
  seed, which is germplasm for future breeding.

White rock chickens are the industry standard but weight gain is usually lower on pasture than in conventional settings. Feeding them probiotics, therefore, might improve the health and weight gain of pasture-raised chickens. With several products on the market, Justin wanted to see if any would have a real effect on his chickens. Justin set out to compare three commercial poultry probiotics to see if they increased growth rates and survival of pasture-raised White Rock chickens.

With the goal of regenerative farming, Brent and Gillian want to minimize tillage for their organic salad greens production. To do this, they trialed tarps to kill residue between succession plantings and recorded the management needed to direct seed. They also tracked labour, including time moving and placing tarps and hand weeding.

Key Findings

• Tarping soil, without tilling before tarping, reduced tillage by 82% and resulted in faster growing crops.
• It also reduced total labour 60% for lettuce and spinach crops because of fewer weeds.
• It increased total labour by 65% for mustard greens, which do not require weeding.

Ecological vegetable growers often struggle with pests and disease pressure. There is anecdotal and observational information around the use of organic foliar sprays, but quantitative data is lacking. While nutrient foliar sprays can be expensive, the cost could be less than time and space cost associated with succession planting needed to manage disease pressure. With the goal of minimizing succession planting and field space while maximizing harvestable yield, Angie tested the efficacy of a nutrient foliar spray to maintain health of her cucurbits.

Adaptive multi-paddock (AMP) grazing uses short grazing intervals followed by long rest periods. By doing so, this system allows for plant recovery, promotes optimal plant communities, protects against erosion and leads to net carbon storage in the soil (Stanley et al 2018). To optimize his grazing, Tony assessed the benefits of ultra high density grazing as part of his AMP approach. Specifically, he tested whether a single pass of mob grazing would provide a “hit and boost” to his pastures. Key Findings:

• The amount of forage consumed was the same, irrespective of standard or ultra high density grazing.
• Tony found no difference in pasture recovery between standard and ultra high density grazing.
• Tony will graze these areas in a similar way next year to see if a second year of a “hit and boost” has benefits.

Ecological cut flower growers are more limited in the their options for managing pests and disease pressure. There is anecdotal and observational information around the use of organic foliar sprays, but quantitative data is lacking. To generate robust data for herself and other growers, Jessica Gale tested the efficacy of a nutrient foliar spray and an anti-fungal spray on two flower varieties.

Northern Ontario faces specific challenges compared to other parts of the province when it comes to seed production, including late springs and early frosts (as early as end of August), followed with a wet fall. The demand for lettuce and greens seed is high, but these growing conditions make producing lettuce seed outdoors very difficult. This means that northern seed producers cannot produce regionally adapted varieties. As a potential solution to lettuce seed production in northern Ontario, Peggy compared seed production in a hoop house and uncovered.

Key Findings

• In the hoop house, Peggy grew sellable lettuce seed from 4 of 5 varieties, and sales of the seeds would recoup hoop house material costs in 2.21 years.
• When grown uncovered, none of the 5 varieties produced viable seed.

Jason Hayes raised groups of Nova Free Ranger and White Rock chickens on pasture and measured feed intake, carcass yield, taste and nutritional quality.

Key Findings

• From one successful replicate, the Nova Free Ranger group had a lower (better) average feed conversion ratio and greater return to labour ($5.30/kg vs. $5.05/kg).
• Blind taste tests suggest the taste and texture of Nova Free Ranger meat is preferred by culinary professionals but that the average non-chef customer may prefer the smoother texture of White Rock meat.
• Average OMEGA 6:3 ratio of one White Rock and one Nova Free Ranger was 9.5:1, higher (worse) than previously published results from pasture-raised chickens but lower (better) than previously published results from non-pasture-raised chickens. Vitamin content was higher than all previously published results.
• Delayed arrival of Nova Free Ranger chicks allowed analysis of only one replicate in 2016, so additional replicates are needed to draw conclusions​.
• Evaluating the nutritional quality and profitability of alternative breeds on pasture helps producers choose breeds that are better suited to integrated, pasture-based farming.

Val and Brent were curious to know if biochar will help regenerate soil in their young apple orchard and help to set in motion biological activity and nutrient retention. Researchers have documented benefits from biochar in arid and tropical soils, which vary by soil fertility status and biochar quality. Much less is known about biochar’s effect in temperate regions, but there is anecdotal support for biochar use from some farmers in Ontario.

Key Findings

• In the first year of application, Val and Brent detected no effect of the biochar amendment on soil microbial activity, as a proxy for soil health.
• They also detected no changes in tree health in the first year of application.
• Val and Brent will continue to monitor soil and tree health in future years.

Much of the flower seed being produced and used by cut flower growers across Canada is grown internationally in the Netherlands, Israel, and various South American and African countries. This means that varieties are not adapted to the Canadian climate and flower growers can’t support local seed houses. Jessica wanted to assess different varieties from local seed houses to find the best one for her farm, and she enlisted the help of other flower growers.

Key Findings

• There was not a detectable difference in plant quality among blush or white varieties.
• While there was not enough data to analyze statistically, Jessica recorded differences in bloom period and vase life. In doing so, she gained insight into the importance of these factors – especially in hot southern Ontario – for future variety trials of Sweet Peas.

The Environment Commissioner of Ontario’s report on soil health.

Web link to free PDF download of SARE’s Systems Research for Agriculture e-book. This handbook is essential reading for research coordinators and all other team members as they navigate the complexities of multifaceted systems projects.