Global CA-CoP CONSERVATION AGRICULTURE COMMUNITY OF PRACTICE

for sustainable production intensification and land management


Dear Subscribers,

Please see herebelow the Latest Scoops on Conservation Agriculture Research Updates - January 2017, from the Cornell CA Group.

Apologies for cross-posting.

Amir Kassam

Moderator

e-mail: [log in to unmask]      
URL:
www.fao.org/ag/ca



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---------- Forwarded message ----------
From: Peter Hobbs <[log in to unmask]>
Date: Fri, Jan 13, 2017 at 9:11 PM
Subject: Latest Scoops on Conservation Agriculture Research Updates - January 2017
To: Amir Kassam <[log in to unmask]>


Dear Amir: This is the latest, January, 2017 CA Research Updates. Can you send out to all your members of your listserve? Thanks Peter

 

You can also review on-line at http://www.scoop.it/t/conservation-agriculture-by-conservation-ag 

 

Subject: Latest Scoops on Conservation Agriculture Research Updates - January 2017

onservation Agriculture Research Updates - January 2017

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This study in France looked at SOC dynamics in a 16 year long term experiment using 4 arable cropping systems without manure under conventional, low input, CA and organic management. There was no significant difference in SOC mineralization rates between all cropping systems including CA under no-till. In particular, the increased SOC storage in CA was explained by higher carbon inputs compared to the other cropping systems (+1.72 t C ha1 yr1 on average). The CA and ORG systems were less productive than the CON and LI systems but the smaller C inputs derived from cash crop residues were compensated by the extra inputs from additional crops (fescue and alfalfa) specifically grown in CA and ORG, resulting in a positive carbon storage in soil. They conclude that alternative arable systems can sequester organic carbon in temperate areas through higher carbon input rather than the effect of reduced tillage.

 

 

 

Conservation agriculture (CA) is a potential solution in RW areas of NW India, which can be achieved by switching from puddling then transplanting of rice to dry seeding (DSR), together with changing from conventional tillage (CT) to zero tillage (ZT) for wheat with surface retention of rice residues. This paper studies this issue. Growth of non-mulched ZT wheat was inferior to that of mulched ZT wheat, and that of CT wheat with and without mulch, regardless of tillage for rice, although this was not reflected in wheat grain yield. The results suggest that in a dry seeded rice-wheat cropping system, surface retention of rice residues can improve the growth of ZT wheat right from the first crop, although this did not affect yield in the first three years. However, whether there is an adverse carry over effect of the rice residues on DSR requires further investigation.

 




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