نتایج جستجو برای: permanent wilting point
تعداد نتایج: 584032 فیلتر نتایج به سال:
abstract infiltration process is one of the most important components of the hydrological cycle. on the other hand, the direct measurement of infiltration process is laborious, time consuming and expensive. in this study, the possibility of predicting cumulative infiltration in specific time intervals, using readily available soil data and artificial neural networks (anns) was investigated. for...
One of the most common problems faced by hay or silage producers is how to manage production schedules around unfavorable weather. Inevitably, some wilting forage crops are damaged by rainfall each year, and producers often inquire about the effects of rain damage, and what impact this may have on forage quality, silage fermentation, and animal performance. Actually, the problem is more complex...
Recent findings indicate that atmospheric warming increases the persistence of weather patterns in mid-latitudes, resulting sequences longer dry and wet periods compared to historic averages. The alternation progressively extremes could increasingly select for species with a broad environmental tolerance. As consequence, biodiversity may decline. Here we explore relationship between summer prec...
We need measurements of soil water retention (SWR) and available capacity (AWC) to assess model functions, but methods are time-consuming expensive. Our aim here was investigate the modelling AWC SWR with visible–near-infrared spectra (vis–NIR) machine-learning method cubist. used soils from 54 locations across Australian agricultural regions, three depths: 0–15 cm, 15–30 cm 30–60 cm. The volum...
The physical properties of biochar have been shown to dramatically influence its performance as a soil amendment. This study assessed the role particle size and hydrophobicity in controlling water movement retention. Softwood pellet five ranges (>2 mm, 2–0.5 0.5–0.25 0.25–0.063 mm <0.063 mm) was used for experiment. These sizes were tested on two types (sandy loam loamy sand) at four different ...
This paper examines the role of soil moisture in quantifying drought through the development of a drought index using observed and modeled soil moisture. In Nebraska, rainfall is received primarily during the crop-growing season and the supply of moisture from the Gulf of Mexico determines if the impending crop year is either normal or anomalous and any deficit of rain leads to a lack of soil m...
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