TY  - CONF
ID  - orgprints11825
UR  - http://orgprints.org/11825/
A1  - Casagrande, Marion
A1  - David, Christophe
A1  - Etienne, Catherine
A1  - Makowski, David
A1  - Valantin-Morison, Muriel
A1  - Jeuffroy, Marie-Hélène
TI  - Agronomic and environmental factors explaining Grain Protein Content variability in organic winter wheat
Y1  - 2008///
N2  - A regional agronomic diagnosis was implemented to identify factors responsible for low values of Grain Protein Content (GPC) in a network of 35 organic winter wheat fields in South-Eastern France. The influence of water nutrition, radiation and temperature, weed density at flowering, nitrogen (N) status of crop at flowering and variety type were studied. Two statistical methods were used successively: classical linear regression and a mixing model approach based on a weighted sum of all possible linear combinations of explanatory variables. GPC was significantly related to variety type, crop N status and weed density. An analysis of variance showed that weed density was related to soil type and nitrogen supply.
AV  - public
KW  - organic winter wheat
KW  -  Grain Protein Content
KW  -  limiting factors
KW  -  diagnosis
ER  -