Change name README

README.txt

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+Project: GPCROPcoupled
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+Model simulating the limitation of potential maize yield by phosphorus (P) at the global scale
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+GPCROP is built from the coupling between 3 models: GPASOIL (soil P dynamic), SIM (potential yield) and GPCROP istelf (dealing with the interaction between GPASOIL, SIM and some others processes: P uptake, carbon/P allocation within the plants, P remobolization)
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+Related publication: Ringeval et al., in prep
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+License: CC-BY 4.0 https://creativecommons.org/licenses/by/4.0/