The Caltec agricultural method is a way that we promote healthy growth from the roots of vegetated plants, by giving calcium to plants and plowing land using microorganisms mainly consisting of a lactic bacterium. It is an effective method to improving the vitality of land and plants while minimising the use of fertilisers and agrochemicals. Although rice plants are weak against lodging and becoming ill from the part of lodging, rice plants ‘harvest season can come under the optimum conditions of a low risk of illness and lodging by improving the roots.