IS THIS THE WAY TO FEED THE WORLD?
In warmer climates the green houses are not nesseccary and solar power is used for pumps and fans
Growing with out soil, not easy to set up on an allotment site or at home, but commercially it has endless possibilities. No worry about soil condition, by stacking certain plants less space is needed, about one tenth of the water used normally on crops is needed, the same solution can be used for weeks, the nutrient levels are monitored daily and only topped up when needed this prevents salinity of the water caused by the salts that are in the fertilisers . This reduces the amount of fertilisers needed and it cannot leach into the soil. The plants are grown in containers with just the roots in the water, the plant it’s self is anchored in either coir or Rockwool. Growth is rapid due to ideal growing conditions plus the extra oxygen in the water that’s being pumped round continuously , lettuce and cucumbers can be ready in just 42 days. Australia have huge set ups that run like conveyor belts new plants feed on one end and mature plants off the other end daily Pakistan have started a hydroponics scheme and Africa is next. Not cheap to set up at the moment, but neither are war machine and hydroponics are a lot more benificial