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<title>OPheno — Open-Source Weed Phenology</title>
<meta name="description" content="OPheno is an open, community-driven initiative to share and curate weed emergence and phenology data." />
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<!-- HEADER -->
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<div>
<h1 class="title">OPheno — Open‑Source Weed Phenology</h1>
</div>
</header>
<!-- HERO -->
<section class="hero">
<h1>An open, community‑driven space for weed emergence & phenology data</h1>
<p class="lead">
OPheno aggregates and curates observations related to weed emergence and phenology to support research, education, and modeling across diverse
environments and management systems.
</p>
<div class="cta-row">
<a class="btn" href="https://huggingface.co/spaces/OPheno/opheno-submission-portal"
target="_blank" rel="noopener">🚀 Submission Portal</a>
</div>
</section>
<!-- ABOUT -->
<section id="about">
<h2>About OPheno</h2>
<p>
OPheno aims to unite the full spectrum of weed‑science knowledge—from academic research and field trials to in-season field observations. By providing an open and shared home for emergence and phenology data, OPheno encourages collaboration, improves transparency,
and accelerates the development of models and tools that depend on
reliable, comparable observations. All datasets hosted under OPheno follow
open‑science principles and aim to support anyone interested in
understanding or predicting weed development.
</p>
</section>
<!-- CONTRIBUTE -->
<section id="contribute">
<h2>Contribute</h2>
<p>
Contributions from researchers, practitioners, and the community are the
heart of the project. If you have observations related to weed emergence
or phenology, please submit them via the
<a href="https://huggingface.co/spaces/OPheno/OPheno-Submission-Portal"
target="_blank" rel="noopener">portal</a>.
The maintainers will review and, when feasible, curate contributions into
the public datasets. Every submission not ready for curation remains
accessible in the submission portal folder for transparency and future
iteration.
</p>
</section>
<!-- LICENSE -->
<section id="license">
<h2>License</h2>
<p>
Unless otherwise noted, data are released under <strong>CC BY 4.0</strong>.
</p>
</section>
<!-- MAINTAINER -->
<section id="maintainer">
<h2>Maintainer</h2>
<p>
OPheno is maintained by
<a href="https://de.linkedin.com/in/heiko-kromminga" target="_blank">Heiko
Hopke Kromminga (BASF)</a>,
<a href="https://de.linkedin.com/in/muhammad-javaid-akhter-40a18975"
target="_blank">Muhammad Javaid Akhter (BASF)</a>,
<a href="https://de.linkedin.com/in/holger-hoffmann-1988834a"
target="_blank">Holger Hoffmann (BASF)</a>, and
<a href="https://de.linkedin.com/in/jorge-alberto-espejel-padilla-b00840216"
target="_blank">Jorge Alberto Espejel Padilla</a>.
</p>
</section>
<!-- ACKNOWLEDGMENTS -->
<section id="acknowledgments">
<h2>Acknowledgments</h2>
<p>
To all collaborators of OPheno.
The maintainers acknowledge the use of large language models for assistance
in drafting documentation.
</p>
</section>
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<div>© <span id="year"></span> OPheno</div>
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