Study

Vineyard δ15N, nitrogen and water status in perennial clover and bunch grass cover crop systems of California's central valley

  • Published source details King A.P. & Berry A.M. (2005) Vineyard δ15N, nitrogen and water status in perennial clover and bunch grass cover crop systems of California's central valley. Agriculture, Ecosystems & Environment, 109, 262-272.

Actions

This study is summarised as evidence for the following.

Action Category

Soil: Plant or maintain ground cover in orchards or vineyards

Action Link
Mediterranean Farmland

Water: Plant or maintain ground cover in orchards or vineyards

Action Link
Mediterranean Farmland
  1. Soil: Plant or maintain ground cover in orchards or vineyards

    A study in 1998–2002 in an irrigated vineyard in the Sacramento Valley, California, USA, found more nitrogen in soil that was cover cropped with legumes, compared to grasses. Implementation options: More nitrogen was found in soil that was cover cropped with legumes, compared to grasses (0.26% vs 0.22% total nitrogen). Methods: A leguminous cover crop (Trifolium fragiferum perennial strawberry clover) was planted in the southern half of the vineyard, and three native Californian, perennial, summer-dormant grasses (Elymus glaucus blue wildrye, Hordeum brachyantherum meadow barley, and Bromus carinatus California brome) were planted in the northern half. These cover crops were planted between every other vine row. They were mown 4–5 times/year and their residues were retained. The vineyard was fertigated with drip lines. Soil samples were collected in five sub-plots, in one 10 x 15 m plot, in each cover crop (0–10 cm depth, 3 cm diameter, nine times in July 2001–October 2002).

     

  2. Water: Plant or maintain ground cover in orchards or vineyards

    A study in 1998–2002 in an irrigated vineyard in the Sacramento Valley, California, USA, found more water in soil that was cover cropped with legumes, compared to grasses, in summer, but found less water in winter. Implementation options: More water was found in soil that was cover cropped with legumes, compared to grasses, in the dry season (13% vs 6% water content), but less water was found in the wet season, after a flood (28% vs 33%). Methods: A leguminous cover crop (Trifolium fragiferum perennial strawberry clover) was planted in the southern half of the vineyard, and three native Californian, perennial, summer-dormant grasses (Elymus glaucus blue wildrye, Hordeum brachyantherum meadow barley, and Bromus carinatus California brome) were planted in the northern half. These cover crops were planted between every other vine row. They were mown 4–5 times/year and their residues were retained. The vineyard was fertigated with drip lines. Soil samples were collected in five sub-plots, in one 10 x 15 m plot, in each cover crop (0–10 cm depth, 3 cm diameter, nine times in July 2001–October 2002).

     

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