Titlebook: Diagnosis of the Nitrogen Status in Crops; Gilles Lemaire Book 1997 Springer-Verlag Berlin Heidelberg 1997 Pflanzen.Stickstoffdüngung.Stic

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Douglas M. Luxenberg,Megan A. McCarvilletillering to anthesis, for different cultivars and growth conditions. The results are mainly derived from Justes et al. (1994) with winter wheat. The validity of the curve of critical plant N% will also be evaluated for spring barely and durum wheat.

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Michiaki Hiroe,Tetsuya Toyozakiity of N soil mineralization in summer, the importance of animal manure inputs in many situations, and the uncertainty of the potential production as a consequence of variation in the intensity of summer drought, make prediction of the optimum N application rate very difficult.

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闯入

Helge Refsum,Ilmar A. Sulg,Knut Rasmussenable and forage cropping, N fertilization practices can provide a sufficient N supply for plants to achieve the potential growth allowed by the amount of energy intercepted by the crop. However, to ensure that this potential yield is reached, the N inputs are often higher than the minimum required f

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Heart Disease Diagnosis and Therapytatus of a crop could be estimated by the nitrogen nutrition index, which relates the actual plant N% to the critical N%. The objective of this first section is to give some examples of the advantage of using such an indicator of crop N status for the analysis and interpretation of agronomical data,

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Cardiac History and Physical Examinationn temperate and tropical regions. Moreover, grasslands are subjected to a wide variety of defoliation treatments according to management plans. This diversity of conditions leads to large temporal and spatial variations in sward structure: i.e., botanical composition, plant morphology and architectu

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Douglas M. Luxenberg,Megan A. McCarvilletillering to anthesis, for different cultivars and growth conditions. The results are mainly derived from Justes et al. (1994) with winter wheat. The validity of the curve of critical plant N% will also be evaluated for spring barely and durum wheat.

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Tsunehiko Kuzuya,Masashi Nishidan legumes have specific traits that could modify this pattern. Growth of the pods and of seeds with a high N concentration after flowering could compensate partly or totally for the decline in plant N%, caused by the decrease of the leaf: stem ratio and the remobilization of N from the shaded to the

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