Abstract
California annual-type grasslands have higher herbaceous plant primary productivity than any extensive vegetation west of the Rocky Mountains in North America. Productivity averages about 2000 kg ha-1 yr-1 with a strong north-south gradient due to rainfall causing productivity to range from about 5000 kg ha-1 yr-1 in the north where perennials (Beetle 1947) and legumes are a larger component to about 1000 kg ha-1 yr-1 in the south (Bartolome et al. 1980). Most of the pristine valley grassland (Heady 1977) has been replaced by irrigated agricultural crops, but much annual grassland remains on the margin of the Great Valley in open grassland, oak (Quercus sp.) savannas, and as understory vegetation in the foothill oak woodlands of the Coast Ranges and the Sierra Nevada mountains below 1000 m elevation.
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Menke, J.W. (1989). Management Controls on Productivity. In: Huenneke, L.F., Mooney, H.A. (eds) Grassland structure and function. Tasks for vegetation science, vol 20. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-3113-8_15
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