| dc.description.abstract | Providing plant water is one of the most important things in the growth of
tomato plants (Lyocopersicum esculentum Mill). Providing proper water in an
effort to save water to avoid excessive water use can be achieved by watering
intervals. Estimating the water requirements of tomato plants (Lyocopersicum
esculentum Mill) can be done using the Hargreaves method. This research aims to
determine the water requirements of tomato plants (Lyocopersicum esculentum
Mill) in andosol soil based on the Hargreaves method and its effect on plant
growth in the Rumah Berastagi village area, Berastagi District, Karo Regency,
North Sumatra. This research used a non-factorial, completely randomized
design. Watering intervals are once a day, once every 3 days, and once every 5
days. The parameters tested were potential evapotranspiration (Etp), plant water
requirements (Etc), fruit weight, water productivity. The results showed that the
highest evapotranspiration value was in August at 5.38 mm/day and the lowest in
October at 4.56 mm/day. The water requirement value of tomato plants was found
in the initial stage at 3.21 mm/day, the middle stage at 5.60 mm/day, and the final
stage at 3.73 mm/day. The result of the largest fruit weight is the treatment of a
watering interval once a day: 3.52 kg. The best water productivity is at the
treatment interval of every 3 days (10,54 g/m3). | en_US |
