نتایج جستجو برای: crop growing periods

تعداد نتایج: 371803  

Journal: :European Journal of Operational Research 2015
Laurent Alfandari Agnès Plateau Xavier Schepler

In this paper, we study a multi-periodic production planning problem in agriculture. This problem belongs to the class of crop rotation planning problems, which have received increased attention in the literature in recent years. Crop cultivation and fallow periods must be scheduled on land plots over a given time horizon so as to minimize the total surface area of land used, while satisfying c...

Regardless the crop production, range and livestock management is unlikely to be possible. Considering the range production is essential for efficient and effective range management. This study aims to investigate the relationship between the rate of forage production and the effects of climate variables. For this purpose, forage yield of four range species including Artemisia sieberi, Scar...

Journal: :Ratarstvo i povrtarstvo 2012

2016
M. Kneubuehler

Remote sensing bears the potential to provide quantitative information of agricultural crops instantaneously and of a certain regional extent. Estimates of crop growth which are used for crop yield prediction, and timing of forthcoming harvest are important in agricultural planning and policy making. For non-optimal growing conditions, estimates of crop growth may be inaccurate. Crop monitoring...

Journal: :Proceedings of the National Academy of Sciences 2009

M.P. Nepomuceno M.S. Yamauti P.L.C.A. Alves P.R.F. Giancotti,

> Sowing crops following cover crops on forage may cause injuries andproductivity reduction, due reasons as allelopathy or glyphosate residues. Theobjective of this study was to evaluate the influence of differing periods betweencover crop (Urochloa ruziziensis) desiccation with glyphosate and sunflower(Aguará 4) sowing in a no-tillage system on crop development and productivity.Two assays were...

2013
Pierre Béziat Tiphaine Tallec Nathalie Jarosz Gilles Boulet

16 17 Climate variability and climate change induce important intra-and inter-annual variability of 18 precipitation that significantly alters the hydrologic cycle. The surface water budgets and the plant or 19 ecosystem water use efficiency (WUE) are in turn modified. Obtaining greater insight into how 20 climatic variability and agricultural practices affect water budgets and regarding their ...

Journal: :Entropy 2017
Liang Cheng Jun Niu Dehai Liao

The spatial and temporal variability of precipitation time series were investigated for the Hexi Corridor, in Northwest China, by analyzing the entropy information. The examinations were performed on monthly, seasonal, and annual timescales based on 29 meteorological stations for the period of 1961–2015. The apportionment entropy and intensity entropy were used to analyze the regional precipita...

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