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calestous's profile
Calestous Juma
Calestous Juma
Calestous Juma
Verified account
@calestous

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Calestous JumaVerified account

@calestous

Professor @BelferCenter @KennedySchool @Harvard | A New Culture of Innovation: Technology, Entrepreneurship and Prosperity (forthcoming book)

bit.ly/2sG3K0T
Joined April 2009

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    Calestous Juma‏Verified account @calestous 19 May 2014

    Low tech keeps #African #maize productivity low at only 2 tons/ha compared to 10 tons/ha in US pic.twitter.com/kz0125uM2w via @GroIntel

    6:16 AM - 19 May 2014
    • 33 Retweets
    • 13 Likes
    • evolucion liberal S Firestone CK Adam Viskovich Roger Cady Sagar Dubey Vahid L Aidun Kat Ellington shomari hatibu
    4 replies 33 retweets 13 likes
      1. New conversation
      2. Wayne Parrott‏ @ProfParrott 8 Jun 2014
        Replying to @calestous

        @calestous @MarcelGutCo Latin American peasants wld love to reach 2 T/ha. Cannot provide for their families with current ylds

        1 reply 0 retweets 0 likes
      3. Tweet unavailable
      4. Wayne Parrott‏ @ProfParrott 8 Jun 2014
        Replying to @MarcelGutCo

        @MarcelGutCo @calestous - that would be the improved varieties. Land races yield far less, and that is what peasants depend on.

        1 reply 0 retweets 0 likes
      5. Tweet unavailable
      6. Wayne Parrott‏ @ProfParrott 9 Jun 2014
        Replying to @MarcelGutCo

        @MarcelGutCo I have seen yields of > 6 t/ha of #GMO corn in Honduras & Colombia. Some reached 9 t/ha

        1 reply 1 retweet 1 like
      7. End of conversation
      1. Stephen‏ @stephenballot 19 May 2014
        Replying to @calestous

        @calestous not to burst your bubble but in South Africa I know a lot of farmers doing 10+. #AfricaIsNotACountry

        0 replies 0 retweets 0 likes
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      1. Phil Carlson‏ @mrphilcarlson 19 May 2014
        Replying to @calestous

        @calestous @mattwridley @GroIntel I was told that Monsanto was the devil. You mean companies actually make people's lives better? #sarcasm

        0 replies 0 retweets 0 likes
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      1. Stacey Rumble‏ @staceyrumble 19 May 2014
        Replying to @calestous

        @calestous @NicSpaull @GroIntel yes, but we also do not have large corporates monopolosing the seed market, which empowers smaller producers

        0 replies 0 retweets 0 likes
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