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You searched for: Journal Agronomy journal Remove constraint Journal: Agronomy journal Source 1993 v.85 no.3 Remove constraint Source: 1993 v.85 no.3 Subject Helianthus annuus Remove constraint Subject: Helianthus annuus Subject dry environmental conditions Remove constraint Subject: dry environmental conditions
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1. A Sunflower Simulation Model: I. Model Development

Author:
Chapman, Scott C.; Hammer, Graeme L.; Meinke, Holger
Source:
Agronomy journal 1993 v.85 no.3 pp. 725-735
ISSN:
0002-1962
Subject:
simulation models; Helianthus annuus; plant development; dry environmental conditions; phenology; dry matter accumulation; growth models; crop yield; decision making; prediction
Abstract:
... In dryland farming systems, opportunities to improve sunflower (Helianthus annuus L.) yields are mostly associated with management decisions made at planting. Dynamic crop simulation models can assist in making such decisions. This study reports the structure of QSUN, a simple and mechanistic crop model for sunflower, and how it accounts for the dynamic interaction of the crop with the soil and ae ...
DOI:
10.2134/agronj1993.00021962008500030038x

2. Leaf Expansion in Field-Grown Sunflower in Response to Soil and Leaf Water Status

Author:
Sadras, V. O.; Villalobos, F. J.; Fereres, E.
Source:
Agronomy journal 1993 v.85 no.3 pp. 564-570
ISSN:
0002-1962
Subject:
Helianthus annuus; leaf area; leaves; leaf water potential; soil water content; dry environmental conditions; root systems; irrigated conditions; spring; summer; water stress; Spain
Abstract:
... Leaf responses to soil water deficits in controlled environaments may be mediated by nonhydraulic root signals (RS). The aim uf this study was to evaluate in the field the effects of RS and leaf water potential (Ψ¹) on leaf expansion rate (LER) of sunflower (Helianihus annuus L.). Two experiments were performed on a deep sandy-loam soil (Typic Xerofluvent) in a Mediterranean environment under spri ...
DOI:
10.2134/agronj1993.00021962008500030009x