Research became more systematic when in 1843, John Lawes and Henry Gilbert began a set of long-term agronomy field experiments at Rothamsted Research Station in England; some of them, such as the Park Grass Experiment, are still running.
ɹᵻsˈɜːtʃ bɪkˌeɪm mˈoːɹ sˌɪstəmˈæɾɪk wɛn ɪn wˈʌn θˈaʊzənd ˈeɪthˈʌndɹɪd fˈoːɹɾi θɹˈiː, dʒˈɑːn lˈɔːz ænd hˈɛnɹi ɡˈɪlbɚt bɪɡˈæn ɐ sˈɛt ʌv lˈɔŋtˈɜːm ɐɡɹˈɑːnəmi fˈiːld ɛkspˈɛɹɪmənts æt ɹˈɑːθæmstᵻd ɹᵻsˈɜːtʃ stˈeɪʃən ɪn ˈɪŋɡlənd; sˌʌm ʌv ðˌɛm, sˈʌtʃ ɐz ðə pˈɑːɹk ɡɹˈæs ɛkspˈɛɹɪmənt, ɑːɹ stˈɪl ɹˈʌnɪŋ.