Global CA-CoP CONSERVATION AGRICULTURE COMMUNITY OF PRACTICE

for sustainable agriculture, land and ecosystem management


Dear Subscribers,

Please see herebelow the February CA Newsletter from Professor Peter Hobbs at Cornell University.

Apologies for any cross-posting.

Amir Kassam

Moderator

Global CA-CoP

e-mail: [log in to unmask]

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



---------- Forwarded message ---------
From: Peter Hobbs <[log in to unmask]>
Date: Mon, 1 Feb 2021 at 16:42
Subject: February Scoopit CA newsletter
To: Amir Kassam <[log in to unmask]>


Dear Amir: Here is our February 2021 Conservation Agriculture Scoopit Research Update. You can also view online at https://www.scoop.it/topic/conservation-agriculture-by-conservation-ag?curate=true&null 
Can you send this out to people who get your listserv material? The hard copy is below.

An easier link to see all the research papers on CA is as follows:

Also, visit our main website at http://soilhealth.org for news and other CA information. Please use this link since we had to move our web site to a new server and this links takes you to the CA web site.

Many thanks for helping to distribute this. Peter

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Official data on the adoption of CA occurred in Brazil in the 2006 and 2017 agricultural census that provided primary data that made possible an analysis of the dynamics of the adoption of NT practice within the development of CA systems in this country. Expansion of the NT practice throughout the country was strongly associated with the expansion of soybean-based cropping systems involving crops such as maize, wheat or cotton. NT practice improved soil moisture conditions and generated additional growing period that permitted the incorporation of soybean crop into CA cropping systems where it was not possible before. The paper concludes that the use of NT as a lone practice is no guarantee for sustainability, and technology transfer and adoption efforts are also required to reinforce the application by farmers of the other two ecological principles of CA; permanent soil mulch cover and crop diversification through rotations and/or associations.
This paper uses a long-term continuous maize experiment to understand water and nitrate-N functions under no-tillage with mulching in dryland farming in China. It reports data for a complete year for spring maize plus the fallow period after 15 years of continuous maize. Treatments included conventional tillage (CT), no-tillage (NT), no-tillage with biochar (NB), no-tillage with straw mulching (NS), no-tillage with plastic film mulching (NP), and no-tillage with straw-plastic film mulching (NSP). Average soil profile water content (SWC) and the soil water storage (SWS) of the mulching treatments  were higher than the non-mulching at each stage. The study did show that mulching is required with NT and just NT may have lower yields. The plastic mulch was the best treatments in their research.
This paper looked at tillage impacts on net global warming potential (NGWP) soil organic carbon (SOC) change and indirect emissions (IE) on a double rice system in Southern China. Three treatments used in this study were no tillage with residue retention (NT), rotary tillage with residue retention (RT), and plow tillage with residue incorporation (PT). In respect of SOC sequestration, annual mean rates (0–20 cm) were not significantly different between tillage treatments averaging 2.89 MgC ha−1 yr−1 during 2005−2014.Two-year (2013–2014) measurement of GHGs showed NT tended to significantly decrease annual CH4, but increase N2O emissions in the paddy soil. The results suggested GHG mitigation and agricultural economic viability can be achieved by NT practice in double rice cropping systems.




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