SRI Global News: Nov. 2023 - Jan. 2024 **sririce.org -- System of Rice Intensification
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SRI Global News: Nov. 2023 - Jan. 2024 **sririce.org -- System of Rice Intensification
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Three Row Paddy Weeder களை எடுக்கும் கருவி

Tamil language video on featuring a three-row paddy weeder that can be used with SRI methods. (However, rows must be very straight to weed 3 rows at once!)

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USA: Earth Links' featured SRI tool: Field markers

USA: Earth Links' featured SRI tool: Field markers | SRI Global News: Nov. 2023 - Jan. 2024 **sririce.org -- System of Rice Intensification | Scoop.it

For the System of Rice Intensification (SRI), planting single seedlings at a wider spacing provides plants with better access to nutrients and sunlight as well as reducing disease and pest damage. A grid pattern with spacing of 25 x 25 to 35 x 35 cm is often adopted. The square pattern also allows the field to be weeded in both directions. Earth Links, Inc., from Santa Cruz, California, has created CAD drawings and collected videos on the construction and use of markers and other tools. Check out their website to find details of markers and other equipment adapted to use with SRI.

Smith Rowe's curator insight, December 8, 2021 2:59 AM
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Featured Tool: Ring Hoe Weeder

Featured Tool: Ring Hoe Weeder | SRI Global News: Nov. 2023 - Jan. 2024 **sririce.org -- System of Rice Intensification | Scoop.it

In this Earth Links, Inc. “Featured Equipment” post we have included two designs and supporting research for the production of a weeding tool which can be made for less than $10 USD. Smallholder rice farmers require efficient, affordable and labor-saving weed management technologies, the ring/stirrup hoe has shown to fit this profile. The Ring Hoe was found to be the most borrowed weeding tool in a Sub-Saharan Africa study, and is one of the most preferred weeders among men and women farmers because it is lightweight and affordable.

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INDONESIA: Alat Permbersih Rumput Disekeliling Tanaman Padi

How to build a homemade manual rotary paddy weeder out of wood and nails!

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CAMBODIA: Featured SRI equipment - The Rice Dragon

CAMBODIA: Featured SRI equipment - The Rice Dragon | SRI Global News: Nov. 2023 - Jan. 2024 **sririce.org -- System of Rice Intensification | Scoop.it

The Rice Dragon is a manual rotary weeder developed “by women for women”. It was designed, produced and marketed by Oxfam and RACHANA in South East Asia. The Rice Dragon is the NGO Earth Links' featured SRI equipment of the month. for November 2019.

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NEW YORK, USA: New tech for an ancient food | Cornell Engineering

NEW YORK, USA: New tech for an ancient food | Cornell Engineering | SRI Global News: Nov. 2023 - Jan. 2024 **sririce.org -- System of Rice Intensification | Scoop.it

In 2013, associate professor Derek Warner began working with the U.S. Navy, supporting their effort to 3-D print flight-critical components for the V-22 Osprey aircraft. After  thinking about other applications for custom 3-D printing, he sent an email to Cornell’s College of Agriculture and Life Sciences and received a response from Erika Styger at SRI-Rice. Warner then sent his doctoral student, Wenjia Gu, to Colombia to investigate more. At an SRI gathering of farmers from several South American countries she then had an opportunity to showcase a 3-D printer and a plastic prototype she had printed. It was a rotor that could be used to retrofit a weeder. With rapid prototyping, according to Gu, farmers could quickly test different designs and make adjustments based on trial and error...

 

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BIHAR, INDIA: Small-scale farming and gender-friendly agricultural technologies: the interplay between gender, labour, caste, policy and practice

BIHAR, INDIA: Small-scale farming and gender-friendly agricultural technologies: the interplay between gender, labour, caste, policy and practice | SRI Global News: Nov. 2023 - Jan. 2024 **sririce.org -- System of Rice Intensification | Scoop.it

Author Regina Hansda examines the interplay among gender, labour, and technology within an emerging, alternative, rice-growing technique called the System of Rice Intensification (SRI) to understand how in situations of agrarian transition, technology affects and influences social dynamics. The weeder, is seemingly suitable for smallholder farmers, and often projected as a gender-friendly device. The paper discusses how intersections of gender, caste and class issues even within agro-ecological farming practices can result in experiences can be highly differentiated.

SRI-Rice's insight:

Hansda, Regina. 2018. Small-scale farming and gender-friendly agricultural technologies: the interplay between gender, labour, caste, policy and practice. Gender, Technology and Development 21(3): 189-205. doi: 10.1080/09718524.2018.1434990 [For access to this subscription article, contact the author or join the SRI Research Network (it's free of charge).]

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BIHAR, INDIA: Comparative performance of manual weeders under system of rice intensification in Indo-Gangetic plains

A field experiment was conducted at ICAR Research Complex for Eastern Region, Patna (25o35' N latitude and 85 o 04' E longitude) during the Kharif 2016 to study the performance of weeders i.e. cono and Mandava weeder in SRI under the irrigated ecosystem. Maximum weeding efficiency was recorded with the mandava weeder as compared to cono-weeder. The mandava weeder, which  consumed minimum man-days/ha, should be promoted at farmer’s fields in wider scale as it reduces energy use of small and marginal farming community of the Indo-Gangetic Plains of the Eastern India. [NOTE: If you are on ResearchGate, you can access full text here: https://tinyurl.com/ycwgn929]

SRI-Rice's insight:

Citation: Bikash, Sarkar, et al. 2017. Comparative performance of manual weeders under system of rice intensification in Indo-Gangetic plains. Indian Journal of Weed Science 49(1): 82-84. doi: 10.5958/0974-8164.2017.00020.X

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MALAYSIA: Comparative study on the performance of rice seedlings raised by single seedling nursery tray method and conventional system

The number of tillers per plant varied significantly due to different methods of raising the seedlings for transplanting. The increment in the average number of tillers per plant was remarkably higher in the newly developed single seedling tray treatment than the conventional practice. Under the present day constraints of lower production of rice crops, this study depicted that using the newly developed single seedling nursery tray is one of the options to increase the number of tillers in SRI farming in order to increase the number of effective tillers, number of panicles, straw yield and grain yield of rice plants. The results from the experiment clearly revealed that younger seedlings raised by the newly developed single seedling tray method resulted to significantly higher number of tillers than in the conventional practice. Thus, the above SRI technique can be extended to the farmers to maximize total production of rice, ultimately contributing to food security.

SRI-Rice's insight:

Wayayok, Aimrun, and Umar Mohammed, et al. 2017. Comparative study on the performance of rice seedlings raised by single seedling nursery tray method and conventional system. American Journal of Plant Biology 2(1): 1-4.

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INDIA: Development of a Solar Energy Operated Weeder for Wetland Paddy Crop

INDIA: Development of a Solar Energy Operated Weeder for Wetland Paddy Crop | SRI Global News: Nov. 2023 - Jan. 2024 **sririce.org -- System of Rice Intensification | Scoop.it

A solar energy operated two-row weeder was developed for weeding in wetland paddy crop. Its major components are power source, power transmission system, weeding wheels, and a float. The power source comprised a DC motor, solar panel, and power storage unit with maximum power point tracker and motor controller. Solar panel/power storage unit through a motor controller supplied power to the DC motor and it was transmitted to the shaft of the weeding wheel through a dog clutch. A float prevents sinkage of the weeder. The weeder could do weeding at a rate of 0.06 ha per hour with field efficiency, weeding efficiency, and plant damage of 83.3%, 83% and 2-3%, respectively. As compared to cono-weeder, the cost of weeding was 41.2 % lower due to higher field capacity and fewer labor requirements. Annual use less than 4.13 ha for the developed weeder was found uneconomical for carrying out weeding. The developed powering system comprising solar photovoltaic panels could supply power to do weeding continuously for 2 hours with a maximum discharge of 20 % from the battery.

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MALAYSIA: Evaluation of different designs of isolated cells to raise single rice seedlings for SRI mechanized transplanting

Many paddy farmers shy away from practicing SRI due to the labour required, especially during transplanting and weeding. Manual transplanting  to ensure proper root establishment of the seedlings makes SRI less appealing to many farmers. Furthermore, the transplanting shock arising from manual transplanting needs to be solved. Mechanized transplanting of young single seedlings eliminates drudgery and enables better exposure to sunlight, water, air, and nutrients. This paper presents a solution to overcome the problem of transplanting shock and the back-breaking manual transplanting, which was achieved by containing the roots of each seedling in a grid of isolated cells. Several designs of isolated cells to contain the root system were fabricated and tested. The most promising design was one with single seedlings raised in bio-degradable capsules arranged close together to fit the conventional rice seedling tray of 300 mm by 600 mm and can accommodate 684 capsules per tray. Upon reaching 2-3 leaf stage, the seedlings with undisturbed roots are ready to be transplanted into the paddy fields using currently available transplanters.

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Featured SRI Equipment: Conoweeder | Earth Links, Inc.

Featured SRI Equipment: Conoweeder | Earth Links, Inc. | SRI Global News: Nov. 2023 - Jan. 2024 **sririce.org -- System of Rice Intensification | Scoop.it

Earth Links, Inc., has reviewed the conoweeder and provided CAD drawings and additional information. For those in countries where the conoweeder is not available, the CAD drawings can provide exact specifications for local production.

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SRI Equipment Innovators Exchange | Facebook Group

SRI Equipment Innovators Exchange | Facebook Group | SRI Global News: Nov. 2023 - Jan. 2024 **sririce.org -- System of Rice Intensification | Scoop.it

The SRI Equipment Innovators Exchange is a group for those  adapting rice production equipment for use with System of Rice Intensification (SRI) methods, designing prototypes, or who are interested in finding SRI equipment ideas for their own farm or project. Sign up here: https://www.facebook.com/groups/SRI.innovators/

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BIHAR, INDIA: Mechanized weed management to enhance productivity and profitability in system of rice intensification

An experiment was conducted during 3 consecutive rainy seasons  at ICAR-Research Complex for Eastern Region, Patna to evaluate the mechanized weed management practices for enhancing the productivity in system of rice intensification (SRI) against farmers’ practice. The seven weed management treatments, viz. conoweeder thrice at 15, 25 and 35 DAT, conoweeder twice at 15 and 30 DAT, post-emergence (PoE) application of bispyribac-Na 25 g/ha (20 DAT) + conoweeder at 35 DAT, conoweeder 15 DAT + bispyribac-Na 25 g/ha (20 DAT), conoweeder on 15 DAT + bispyribac-Na 25 g/ha (20 DAT) + conoweeder 35 DAT, unweeded check and farmers’ practice were evaluated under randomized block design with three replications. Significantly the highest grain yield (5.97 t/ha) was obtained from 3 times conoweeder at 15, 25 and 35 DAT, which was at par with conoweeder twice on 15 and 30 DAT (5.40 t/ha).

 

Integration of herbicide with mechanical weeder did not improve the weed control efficiency and grain yield over conoweeder twice on 15 and 30 DAT. The highest weed control efficiency of 93.3 and 91.7% at 60 DAT were obtained with application of conoweeder thrice at 15, 25 and 35 DAT and conoweeder twice at 15 and 30 DAT, respectively. The crop raised by SRI method produced significantly higher grain and straw yields than that of farmers’ practice. However, in SRI, 2 times conoweeder at 15 and 30 DAT, was found to be effective and economical leading to cost saving for the farmers.

SRI-Rice's insight:

Singh, S. K., et al. 2019. Mechanized weed management to enhance productivity and profitability in system of rice intensification. Indian Journal of Weed Science 51(3): 232-235 [http://isws.org.in/IJWSn/File/2019_51_Issue-3_232-235.pdf]

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Videos about SRI Weeders

Weeders are an important element in scaling up the System of Rice Intensification (SRI) since reduced water use can increase weed pressure. The SRI-Rice Weeder playlist contains nearly 100 videos of manual and mechanized equipment from a number of countries in Africa, Asia and Latin America.

SRI-Rice's insight:

Don't miss the weeder playlist! You will be amazed at the creativity of farmers around the world...

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 INDIA and LAOS: Phumani

"...When the performance of a particular technology is discussed," says Sabarmatee," people narrow down their focus on yield and cost." However, she argues, the importance and the impact of SRI goes far beyond the simple economic factors that are usually considered in assessing a technology. The reduced weight of the younger seedlings is literally a reduced burden on women who would typically carry around 24 bundles at a time, that she calculated weigh an average of 1.5 kg each. Furthermore, the reduction the number of seedlings transplanted under SRI reduces the amount of time spent bending over and frees up time for the cultivation of other nutritious crops.. .they really do the work in less time and in SRI you don't have very flooded conditions and you don't have to be inside the field for a longer time..."

SRI-Rice's insight:

Read more about Phumani and other women's experiences working in the field.. and their feeling about SRI at http://sri4women.org/phumani/

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MALAYSIA: Design of transplanting mechanism for system of rice intensification (SRI) transplanter in Kedah, Malaysia

There is a demand to develop a transplanter specifically for system of rice intensification (SRI) cultivation in Malaysia. This SRI transplanter is different from conventional transplanters as there are special requirements for transplanting. The work focused on a transplanting mechanism that can be later attached to SRI transplanter. The mechanical design was established using a linkage mechanism, having a wheel that acts as a timing wheel to control the distance between transplanted seedlings. The linkage mechanism also controls the opening of the flapper to allow the seedlings together with the nursery soil to be dropped, and controls the stopper to prevent next seedling from sliding down the tray. The use of simple mechanism can be fabricated at low cost. The design was analysed using motion analysis software. Results show the design is suitable and can be fabricated without  problem. The animation successfully shows the perfect movement of the mechanism during the transplanting process.

SRI-Rice's insight:

I hope that some of our readers can try this SRI transplanter out and get back to us with your results!

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AFRICA: Using the Rotary Weeder in Lowland Rice

Weeds are important constraints for rice production. Effective weed management can increase yields by more than 50%, but usually takes a lot of time.

SRI-Rice's insight:

 I recently came across the 2013 video again and thought you might want to watch it again too! It was made by Jonne Rodenburg and his colleagues at AfricaRice.

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