Sugarcane root length density and distribution from root intersection counting on a trench-profile
نویسندگان
چکیده
منابع مشابه
Toric Intersection Theory for Affine Root Counting
Given any polynomial system with fixed monomial term structure, we give explicit formulae for the generic number of roots with specified coordinate vanishing restrictions. For the case of affine space minus an arbitrary union of coordinate hyperplanes, these formulae are also the tightest possible upper bounds on the number of isolated roots. We also characterize, in terms of sparse resultants,...
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چکیده ندارد.
15 صفحه اولRoot orientation of four sorghum cultivars: application to estimate root length density from root counts in soil profiles
The root length density (RLD) distribution in the soil is a key factor for water and nutrient uptake but its direct assessment is not easy. A field method is presented here to assess RLD of sorghum (Sorghum bicolor L. Moench) from the root intersection density (RID) and taking root orientations into account. The method was developed with four varieties cropped in 2006 in Bambey (Senegal) on a s...
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temporal distributions of RLD using experimental measurements and simulations. The root length density (RLD) is an important parameter to model Experimental measurement approaches of RLD diswater and nutrient movement in the vadose zone and to study soil– tributions include the root sampling method (Kumar root–shoot–atmosphere interactions. However, it is difficult and timeet al., 1993) and rhi...
متن کاملUltrametric Root Counting
If K is a complete non-archimedean field with a discrete valuation and f ∈ K[X ] is a polynomial with non-vanishing discriminant. The first main result of this paper is about connecting the number of roots of f to the number of roots of its reduction modulo a power of the maximal ideal of the valuation ring of K. If the polynomial f is regular, we give an algorithmic method to compute the exact...
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ژورنال
عنوان ژورنال: Scientia Agricola
سال: 2011
ISSN: 0103-9016
DOI: 10.1590/s0103-90162011000100014