lathyrus_long

9 ms·

1. 61.▲
   by lathyrus_long 5y ago

   The list of pesticides allowable in organic farming is (at least under OMRI rules) determined by naturalness, not safety. For example, pyrethrin occurs naturally in chrysanthemums, so it's allowed, even though it's highly toxic to
2. 62.▲
   by lathyrus_long 5y ago

   In hydroponic culture, it's typical to measure and continuously adjust the pH and fertilizer content of the solution, using electrical conductivity (EC) as a proxy for fertilizer content and a glass electrode for pH. This is open hardw
3. 63.▲
   Show HN: Open hardware for hydroponic automation (EC, pH, irrigation, etc.)(github.com)

   10 points by lathyrus_long 5y ago|1 comments