Results 21 to 30 of about 2,158,107 (298)

Influence of Paulownia fortunei (Seem.) Hemsl. roots on preferential flow in the red soil hilly region

open access: yesSoil and Water Research, 2023
Preferential water flow in soil significantly affects runoff, water infiltration, storage, groundwater environment, and soil stability. Plant roots positively affect preferential flow development.
Zhuo Tian   +4 more
doaj   +1 more source

Modelling diverse root density dynamics and deep nitrogen uptake — a simple approach [PDF]

open access: yes, 2009
We present a 2-D model for simulation of root density and plant nitrogen (N) uptake for crops grown in agricultural systems, based on a modification of the root density equation originally proposed by Gerwitz and Page in J Appl Ecol 11:773–781, (1974). A
A Bloom   +39 more
core   +1 more source

Water Uptake by Artemisia ordosica Roots at Different Topographic Positions in an Alpine Desert Dune on the Northeastern Qinghai–Tibet Plateau

open access: yesFrontiers in Earth Science, 2022
Different strategies of water uptake by roots in a semi-arid desert are one way that plants adapt to the water-limited environment. In this study, stable isotopes of δ18O were used to analyze the variability in water sources of the native species ...
Haijiao Wang   +6 more
doaj   +1 more source

Tree growth and management in Ugandan agroforestry systems: effects of root pruning on tree growth and crop yield [PDF]

open access: yes, 2008
Tree root pruning is a potential tool for managing below-ground competition when trees and crops are grown together in agroforestry systems. This study investigates its effects on growth and root distribution of Alnus acuminata (HB & K), Casuarina ...
Deans, J. Douglas   +5 more
core   +1 more source

Distribution of Roots of Polynomial Congruences [PDF]

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2007
For a primep, we obtain an upper bound on the discrepancy of fractionsr/p, whererruns through all of roots modulopof all monic univariate polynomials of degreedwhose vector of coefficients belongs to ad-dimensional boxℬ. The bound is nontrivial starting with boxesℬof size|ℬ|≥pd/2+ɛfor any fixedɛ<0and sufficiently largep.
openaire   +2 more sources

Root Vertex Valency Distributions of Rooted Maps and Rooted Triangulations

open access: yesEuropean Journal of Combinatorics, 1994
We obtain the asymptotic distributions of root vertex valencies for rooted maps and rooted triangulations on general surfaces. We show that the asymptotic distributions are independent of the surface.
Zhicheng Gao, L. Bruce Richmond
openaire   +2 more sources

Relating Profile Wall Root-Length Density Estimates to Monolith Root-Length Density Measurements of Cover Crops

open access: yesAgronomy, 2021
Different methods have been proposed for in situ root-length density (RLD) measurement. One widely employed is the time-consuming sampling of soil cores or monoliths (MO).
Tábata Aline Bublitz   +5 more
doaj   +1 more source

EFFECT OF PLOWING AND IRRIGATION SCHEDULING ON SEASONAL WATER CONSUMPTION, YIELD AND ROOT DISTRIBUTION OF MUNG BEAN UNDER SURFACE AND DRIP IRRIGATION [PDF]

open access: yesمجلة الأنبار للعلوم الزراعية, 2020
Two field experiments were carried out in the feed crop studies station of the Ministry of Agriculture - Haditha agriculture division located in the village of Sakran - Haditha district 260 km west of Baghdad.
M. A. Khalil   +2 more
doaj   +1 more source

The dynamics of root meristem distribution in the soil [PDF]

open access: yesPlant, Cell & Environment, 2010
Plants must develop efficient root architectures to secure access to nutrients and water in soil. This is achieved during plant development through a series of expansion and branching processes, mostly in the proximity of root apical meristems, where the plant senses the environment and explores immediate regions of the soil.
Dupuy, L.   +3 more
openaire   +3 more sources

Dry Season Transpiration and Soil Water Dynamics in the Central Amazon

open access: yesFrontiers in Plant Science, 2022
With current observations and future projections of more intense and frequent droughts in the tropics, understanding the impact that extensive dry periods may have on tree and ecosystem-level transpiration and concurrent carbon uptake has become ...
Gustavo C. Spanner   +16 more
doaj   +1 more source

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