Roots’ RZTO technology delivers substantially increased yields

By Trevor Hoey. Published at May 21, 2020, in Technology

Roots Sustainable Agricultural Technologies Limited (ASX:ROO) has reported very encouraging results on the effects of root zone heating of asparagus from a Proof of Concept (POC) trial undertaken at its research and development facility in Israel using the company’s proprietary Root Zone Temperature Optimisation (RZTO) technology.

The asparagus fruits were heated in applying two levels, one plot being heated to around 22 degrees centigrade to 24 degrees centigrade using a hybrid system, a fusion of a ground source heat exchange (GSHE) and a heat pump, and the other heating to around 26 degrees centigrade to 28 degrees centigrade using GSHE only.

Results from 7 harvest cycles showed that asparagus heated at the root zone level using Roots’ RZTO GSHE solution showed a mean increase of yield by 90% of all marketable asparagus compared with the control plot.

While the hybrid GSH and heat pump system resulted in a 15% increase only compared with control group (possibly due to lower temperatures), the GSHE with only coils and circulation pump resulted in the impressive yield increase of 165%.

Management has drawn the conclusion that the higher roots zone temperature of the GSHE as seen below resulted in significant yield increase.

Commercialisation opportunities to target a US$20 billion industry

These results provide Roots with considerable validation of its RZTO technology and present a significant commercial opportunity.

RZTO technology optimises plant physiology for increased growth, productivity and quality by stabilising the plant’s root zone temperature year round.

Optimal root zone temperature is commonly known to be the most influential parameter besides water in a plant’s physiology.

Asparagus is a unique and high-end perennial crop, producing multiple crop harvests and a very long growing cycle of up to 15 years.

It is also susceptible to cold, and growth can be diminished due to cold stress, and as part of the study, the POC crop was heated between February 6, 2020 and April 4, 2020.

During that time, the number of marketable size fruits increased by 95% in the root zone heated crop.

Heated asparagus resulted in 46% more marketable yield over all fruit sizes compared with unheated asparagus.

This development provides a significant opportunity for ROO as the global market for fresh asparagus is valued at over US$20 billion.

The canned and frozen market segment for the plant is also expected to grow rapidly in coming years, and Roots will now begin aggressively marketing its RZTO technology to asparagus growers.

Environmental benefits

The RTZO system can reduce the incidence of using plastics that aren’t environmentally friendly to heat the plant during growth periods, and it is only required to be embedded into the soil every six to eight years, leaving the plant’s growing cycle uninterrupted.

RZTO is also the only technology that can economically heat crops in open fields, which is the most common growing method.

Discussing recent developments, Roots’ chairman and chief executive Boaz Wachtel said, “Results from this early study are very encouraging and further validate our RZTO technology and its applicability to a large number of commercial crops.

‘’Discussions with commercial asparagus growers are advancing favourably.

‘’Heating asparagus roots using the energy efficient and environmentally sustainable GSHE as compared with traditional heating system, opens new horizons for Roots.

“We continue to witness an increased interest in our RZTO solutions as more countries and producers tackle the issue of food security and increase local cultivation to decrease reliance on imports.

“Our new business pipeline is building favourably despite the slowdown in the sales cycle that COVID-19 has caused, and we look forward to delivering more updates on R&D and our commercial progress.”

View Our Investment Portfolios

S3 Consortium Pty Ltd (CAR No.433913) is a corporate authorised representative of LeMessurier Securities Pty Ltd (AFSL No. 296877). The information contained in this article is general information only. Any advice is general advice only. Neither your personal objectives, financial situation nor needs have been taken into consideration. Accordingly you should consider how appropriate the advice (if any) is to those objectives, financial situation and needs, before acting on the advice.

Conflict of Interest Notice

S3 Consortium Pty Ltd does and seeks to do business with companies featured in its articles. As a result, investors should be aware that the Firm may have a conflict of interest that could affect the objectivity of this article. Investors should consider this article as only a single factor in making any investment decision. The publishers of this article also wish to disclose that they may hold this stock in their portfolios and that any decision to purchase this stock should be done so after the purchaser has made their own inquires as to the validity of any information in this article.

Publishers Notice

The information contained in this article is current at the finalised date. The information contained in this article is based on sources reasonably considered to be reliable by S3 Consortium Pty Ltd, and available in the public domain. No “insider information” is ever sourced, disclosed or used by S3 Consortium.

Australian ASX Small Cap stocks | Why is Australia’s leading small cap publication

Founded seven years ago, is Australia’s leading and longest standing website for investor and finance news, education and expert opinion.

Published by StocksDigital, Finfeed was created to report daily on the comings and goings of ASX listed stocks in the small cap market.

As the first digital publication dedicated specifically to this space, Finfeed soon became the most trusted publication in the market, quickly garnering over two million page views – a number that continues to rise. provides its readers with informative articles that tackle the latest in market moving #ASX small cap news, plus exclusive content you won’t find anywhere else. It is aimed at those with an interest in investing, market education, company performance, start-ups and much more. is the only media organisation operating under the strength of a Financial Services License and is backed by leading journalists and analysts all with brands of their own.

The website aims to inform, educate and entertain with content that drills down into the heart of financial matters.

Finfeed is a leading source of investor and market information, with everything investors need to know about how to invest written in a way that anyone can understand. 

Over the years, the website has expanded beyond exclusively reporting on small caps, to profile Australia’s leading ASX listed small, mid and large caps as well as some of the country’s most successful CEOs and business leaders to find out what makes them tick.

Every day you will find fresh content covering:

Fast Facts

Over 4,000 articles published

Over 2.3 Million Page Views and counting

Over 10,000 followers on social media

Subscriber list growing by 2% monthly

Thanks for subscribing!