What scientist in the 17th century conducted an experiment on plant root nutrition?

Many natural scientists have studied the life of plants, the reason for their growth. In the XVII century. Dutch scientist, doctor Jan Van Helmont conducted an experiment on plant root nutrition. For five years, he watched the willow, which he planted in a tub with a certain mass of earth. Pouring rainwater, after five years, he stated the fact that the willow had grown and weighed 33 times its original weight. At the same time, the mass of the earth remained almost the same. Helmont came to the erroneous conclusion that the plant ate only water.