PRACTICE Global CA-CoP CONSERVATION AGRICULTURE COMMUNITY OF

for sustainable agriculture and land management


Dear Subscribers,

Please see herebelow the latest July CA newsletter from Professor Peter Hobbs at Cornell.

Apologies for any cross-posting.

Thank you Peter for sharing.

Amir Kassam

Moderator

Global CA-CoP

e-mail: [log in to unmask]

URL: http://www.fao.org/conservation-agriculture

 

Conservation Agriculture is an ecosystem approach to regenerative sustainable agriculture and land management based on the practical application of context-specific and locally adapted three interlinked principles of: (i) Continuous no or minimum mechanical soil disturbance (no-till seeding/planting and weeding, and minimum soil disturbance with all other farm operations including harvesting);  (ii) permanent maintenance of soil mulch cover (crop biomass, stubble and cover crops); and (iii) diversification of cropping system (economically, environmentally and socially adapted rotations and/or sequences and/or associations involving annuals and/or perennials, including legumes and cover crops), along with other complementary good agricultural production and land management practices.

---------- Forwarded message ---------
From: Peter Hobbs <[log in to unmask]>
Date: Mon, 29 Jun 2020 at 15:53
Subject: Latest July CA newsletter
To: Amir Kassam <[log in to unmask]>


Dear Amir: Here is our July 2020 Conservation Agriculture Scoopit Research Update. You can also view on line at https://www.scoop.it/topic/conservation-agriculture-by-conservation-ag?curate=true&null  Can you send this out to people who get your list serve material? The hard copy is below. Many thanks for helping to distribute this. Peter
An easier link to see all of the research papers on CA is as follows:

See our full research database at:


Also, visit our main website at http://soilhealth.org for news and other CA information.



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Direct seeded rice is a possible replacement for the water, labor and energy intensive transplanted rice if weeds can be controlled. This study looked at integrated weed control that included rice under puddled and unpuddled  conditions, NT with direct seeded rice with or without residue retention and cover crops, NT transplanted rice and combinations of herbicides with and without cover crops. In the first year NTDSR with or without residue had more weeds compared to puddled transplanted treatments. In the 2nd year weeds were the same and in the 3rd year weeds were less in the NTDSR treatments. Plots under NTDSR yielded the same or more then the PTPR treatments. Herbicides were effective in controlling specific weeds and the study recommended two herbicides in combination for control of weeds in DSR.
Soil degradation by soil organic carbon loss is a major concern in SSA. This study assesses the long-term (13 years) changes in SOC, aggregate associated C, particulate organic C (POC) and infiltration in sub-tropical, monocropping maize at 3 soil depths in South Africa. Tillage treatments were No-till (NT) and rotational tillage (RT) both with permanent residue cover and CT with residue removed. Nitrogen treatments were 0, 100 and 200 kg/ha. On average Total SOC did not differ between tillage treatments, but varied with depth where it was stratified in the 0-10 cm depth in NT and RT. POC varied and decreased significantly in the 0-10 cm depth with increased tillage intensity. They conclude that reduced soil disturbance improves physical protection of SOC, soil structure and infiltration but TSOC takes time to improve.




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