Pérdidas de nitrógeno por volatilización y eficiencia de uso en maíz desde urea aplicada en diferentes momentos by Pablo A. Barbieri, H.E. Echeverría, H.R. Saínz Rozas

“…En general, las pérdidas de N-NH3 se incrementaron con la dosis de N, siendo mayores desde el tratamiento 120 kg N ha-1, mientras las pérdidas desde el tratamiento 60 kg N ha-1 no difirieron de las del tratamiento 0N. …”
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COMPORTAMIENTO AGRONÓMICO Y NUTRICIONAL DE GENOTIPOS DE B rachiaria SPP. MANEJADOS CON FERTILIZACIÓN NITROGENADA, SOLOS Y ASOCIADOS CON Pueraria phaseoloides , EN CONDICIONES... by O. Pérez-López, G. Afanador-Téllez

“…El tratamiento de la gramínea + N92 (kgN.ha -1 ) presentó valores significativamente ( p < 0,001) superiores de PC (9,55%) y degradabilidad del forraje (65,7%), y los menores contenidos de ma - teria seca (37,05%), FDN (61,97%) y FDA (30,55%) en relación con las gramíneas fertilizadas con 46 kgN.ha -1 y las gramíneas asociadas con Kudzú y fertilizadas con 46 kgN.ha -1 . …”
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Deep application of controlled-release urea increases the yield and saponin content of Panax notoginseng by regulating soil nitrate distribution by Yun-xia Su, Yun-xia Su, Yun-xia Su, Ping Zhao, Li-jie Jia, Li-jie Jia, Li-jie Jia, Yuan-feng Cao, Guan-ze Liu, Guan-ze Liu, Jun-wen Chen, Jun-wen Chen, Sheng-chao Yang, Sheng-chao Yang, Yan-li Zhou, Guang-qiang Long, Guang-qiang Long, Guang-qiang Long

“…However, its effects on P. notoginseng yield and quality, a medicinal plant with a prolonged nutrient acquisition duration, remain unclear.MethodsIn this study, we conducted a two-year field plot experiment to investigate the effect of CRU on P. notoginseng with three placement depths (0, 6, and 12 cm denoted as R0, R6, and R12, respectively) at an application dosage of 250 kg N ha-1 with biochar addition (R6B) and 20% N reduction (R6R) based on the R6, with conventional fertilization (250 kg N ha-1, common urea) serving as the control (CK).ResultsOur results indicated that yields increased by 27.1–37.6% with R0, R6, R12, and R6B, while remaining stable with R6R compared to CK. …”
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Anatomical Adaptations of Halophyte Leaves (<i>Nitraria retusa</i> [Forsskal] Asch. and <i>Atriplex halimus</i> L.) in Response to Cement Dust Pollution in Arid Environments by Nouha Krir, Mounira Mkaddem Guedri, Mehrez Romdhane, Manel Abdullah Alshaqha

“…These anatomical responses suggest that <i>N. retusa</i> and <i>A. halimus</i> could be effective bioindicators for detecting cement dust pollutants. …”
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Influence of No-Tillage on Soil Organic Carbon, Total Soil Nitrogen, and Winter Wheat (Triticum aestivum L.) Grain Yield by Peter Omara, Lawrence Aula, Elizabeth M. Eickhoff, Jagmandeep S. Dhillon, Tyler Lynch, Gwendolyn B. Wehmeyer, William Raun

“…In each tillage system, treatments included nitrogen (N) rates at E222 (0, 45, 90, and 135 kg·N·ha−1) and E502 (0, 22.5, 45, 67, 90, and 112 kg·N·ha−1). …”
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A scoping review of strategies for the prevention of hip fracture in elderly nursing home residents. by Anna M Sawka, Nofisat Ismaila, Ann Cranney, Lehana Thabane, Monika Kastner, Amiram Gafni, Linda J Woodhouse, Richard Crilly, Angela M Cheung, Jonathan D Adachi, Robert G Josse, Alexandra Papaioannou

“…Data from 20 trials were included: 7--vitamin D (n = 12,875 participants), 2--sunlight exposure (n = 522), 1--alendronate (n = 327), 1--fluoride (n = 460), 4--exercise or multimodal interventions (n = 8,165), and 5--hip protectors (n = 2,594). …”
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The higher-order matching polynomial of a graph by Oswaldo Araujo, Mario Estrada, Daniel A. Morales, Juan Rada

“…The polynomial M(x)=∑j=0[n/2](−1)jp(G,j)xn−2j, called the matching polynomial of G, is closely related to the Hosoya index introduced in applications in physics and chemistry. …”
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Enumerating Matroids and Linear Spaces by Kwan, Matthew, Sah, Ashwin, Sawhney, Mehtaab

“…This is the final piece of the puzzle for enumerating fixed-rank matroids at this level of accuracy: there are exact formulas for enumeration of rank-1 and rank-2 matroids, and it was recently proved by van der Hofstad, Pendavingh, and van der Pol that for constant $r\ge 4$ there are $(e^{1-r}n+o(n))^{n^{r-1}/r!}$ rank-$r$ matroids on a ground set of size $n$.…”
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On the boundedness of a family of oscillatory singular integrals by Al-Qassem, Hussain, Cheng, Leslie, Pan, Yibiao

“…We prove that \[ \Biggl |\mbox {p.v.}\int _{\mathbb{R}^n}e^{i(P(x)+1/Q(x))}\frac{\Omega (x/|x|)}{|x|^n}\mathrm{d}x\Biggr | \le A \Vert \Omega \Vert _{H^1(\mathbb{S}^{n-1})} \] where $A$ may depend on $n$, $\deg (P)$ and $\deg (Q)$, but not otherwise on the coefficients of $P$ and $Q$.The above result answers an open question posed in [13]. …”
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Global Behavior of the Difference Equation xn+1=xn-1g(xn) by Hongjian Xi, Taixiang Sun, Bin Qin, Hui Wu

“…We consider the following difference equation xn+1=xn-1g(xn), n=0,1,…, where initial values x-1,x0∈[0,+∞) and g:[0,+∞)→(0,1] is a strictly decreasing continuous surjective function. …”
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Nonexistence of Homoclinic Solutions for a Class of Discrete Hamiltonian Systems by Xiaoping Wang

“…We give several sufficient conditions under which the first-order nonlinear discrete Hamiltonian system Δx(n)=α(n)x(n+1)+β(n)|y(n)|μ-2y(n),Δy(n)=-γ(n)|x(n+1)|ν-2x(n+1)-α(n)y(n) has no solution (x(n),y(n)) satisfying condition 0<∑n=-∞+∞[|x(n)|ν+(1+β(n))|y(n)|μ]<+∞, where μ,ν>1 and 1/μ+1/ν=1 and α(n),β(n), and γ(n) are real-valued functions defined on ℤ.…”
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Synthesis and Characterization of a Novel Class of Lewis Acid Doped Tetraaniline by K. Basavaiah, A. V. Prasada Rao

“…In the first step, emeraldine base form tetraaniline was synthesized via oxidative chemical polymerization of N-phenyl-1, 4-phenylenediamine using ammonium persulphate as oxidant. …”
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Existence Results for Fractional Difference Equations with Three-Point Fractional Sum Boundary Conditions by Thanin Sitthiwirattham, Jessada Tariboon, Sotiris K. Ntouyas

“…We consider a discrete fractional boundary value problem of the form Δαu(t)=f(t+α-1,u(t+α-1)),  t∈[0,T]ℕ0:={0,1,…,T},  u(α-2)=0,  u(α+T)=Δ-βu(η+β), where 1<α≤2, β>0, η∈[α-2,α+T-1]ℕα-2:={α-2,α-1,…,α+T-1}, and f:[α-1,α,…,α+T-1]ℕα-1×ℝ→ℝ is a continuous function. The existence of at least one solution is proved by using Krasnoselskii's fixed point theorem and Leray-Schauder's nonlinear alternative. …”
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The Role of Nonpolynomiality in Uniform Approximation by RBF Networks of Hankel Translates by Isabel Marrero

“…Then, the linear span of dilates and Hankel translates of ϕ is dense in Cμ,c for all c∈I if, and only if, ϕ∉πμ, where πμ=span{t2n+μ+1/2:n∈Z+}.…”
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Marcinkiewicz-type strong law of large numbers for double arrays of pairwise independent random variables by Dug Hun Hong, Seok Yoon Hwang

“…as  m∨n→∞.                                     (0.1) Under the weak condition of E|X|plog+|X|<∞, it converges to 0 in L1. …”
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Existence of Bounded Positive Solutions for Partial Difference Equations with Delays by Zeqing Liu, Zhihua Wu, Young Chel Kwun, Shin Min Kang

“…This paper deals with solvability of the third-order nonlinear partial difference equation with delays Δn(am,nΔm2(xm,n+bm,nxm-τ0,n-σ0))+f(m,n,xm-τ1,m,n-σ1,n,…,xm-τk,m,n-σk,n)=cm,n,  m≥m0,  n≥n0. With the help of the Banach fixed-point theorem, the existence results of uncountably many bounded positive solutions for the partial difference equation are given; some Mann iterative schemes with errors are suggested, and the error estimates between the iterative schemes and the bounded positive solutions are discussed. …”
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On coefficient bounds of a certain class of p-valent λ-spiral functions of order α by M. K. Aouf

“…Let Sλ(A,B,p,α)(|λ|<π2, −1≦A<B≦1 and 0≦α<p), denote the class of functions f(z)=zp+∑n=p+1∞anzn analytic in U={z:|z|<1}, which satisfy for z=reiθ∈Ueiλsecλzf′(z)f(z)−ip tanλ=p+[pB+(A−B)(p−α)]w(z)1+Bw(z), w(z) is analytic in U with w(0)=0 and |w(z)|≦|z| for z∈U. …”
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On the weak law of large numbers for normed weighted sums of I.I.D. random variables by André Adler, Andrew Rosalsky

“…For weighted sums ∑j=1najYj of independent and identically distributed random variables {Yn,n≥1}, a general weak law of large numbers of the form (∑j=1najYj−νn)/bn→P0 is established where {νn,n≥1} and {bn,n≥1} are statable constants. The hypotheses involve both the behavior of the tail of the distribution of |Y1| and the growth behaviors of the constants {an,n≥1} and {bn,n≥1}. …”
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Leading-logarithmic threshold resummation of Higgs production in gluon fusion at next-to-leading power by Martin Beneke, Mathias Garny, Sebastian Jaskiewicz, Robert Szafron, Leonardo Vernazza, Jian Wang

“…Abstract We sum the leading logarithms α s n ln 2 n − 1 1 − z $$ {\alpha}_s^n{\ln}^{2n-1}\left(1-z\right) $$ , n = 1, 2, . . . , near the kinematic threshold z = m H 2 / s ̂ → 1 $$ z={m}_H^2/\hat{s}\to 1 $$ at next-to-leading power in the expansion in (1 − z) for Higgs production in gluon fusion. …”
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Existence of Three Positive Solutions for m-Point Discrete Boundary Value Problems with p-Laplacian by Yanping Guo, Wenying Wei, Yuerong Chen

“…We consider the multi-point discrete boundary value problem with one-dimensional p-Laplacian operator Δ(ϕp(Δu(t−1))+q(t)f(t,u(t),Δu(t))=0, t∈{1,…,n−1} subject to the boundary conditions: u(0)=0, u(n)=∑i=1m−2aiu(ξi), where ϕp(s)=|s|p−2s,p>1,ξi∈{2,…,n−2} with 1<ξ1<⋯<ξm−2<n−1 and ai∈(0,1),0<∑i=1m−2ai<1. …”
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