Irrigation is the system that most often fails quietly: a blocked line, a stuck valve or a leak does damage long before anyone notices. Good irrigation control is mostly zone design, scheduling and monitoring. Choose the method per crop Drip: delivers water and nutrients at the root with high efficiency and dry foliage. The default […]
Light is the input growers most often get wrong, because it is measured in several confusing ways. Two numbers do most of the work: PPFD and DLI. PPFD: light right now Photosynthetic photon flux density (PPFD) is the number of photons in the 400 to 700 nm range that land on a square metre each […]
Relative humidity alone is a poor guide to how a plant feels, because the same percentage means different things at different temperatures. Vapour pressure deficit (VPD) fixes that by measuring the actual drying power of the air. What VPD is VPD is the difference, in kilopascals (kPa), between the amount of water vapour the air […]
