The Spatial Simulation of Soil Volumetric Moisture Content in Different Growth Stages of Peanut

2012 ◽  
Vol 10 (1) ◽  
pp. 155-161
Author(s):  
Yujian Yang ◽  
Shubo Wan ◽  
Jianhua Zhu ◽  
Zhicheng Wang
Keyword(s):  
Moisture Content ◽  
Growth Stages ◽  
Spatial Simulation ◽  
Volumetric Moisture Content ◽  
Different Growth Stages

A climatological study of soil moisture under corn crop at Campina Grande (NE Brazil)

MAUSAM ◽  
2021 ◽  
Vol 48 (3) ◽  
pp. 437-442
Author(s):  
K.KARUNA KUMAR ◽  
JOSE ANTONIO TOMAS DA SILVA ◽  
VIRGINIA DE FATIMA BEZERRA
Keyword(s):  
Soil Moisture ◽  
Moisture Content ◽  
Markov Chain Model ◽  
Moisture Loss ◽  
Growth Stages ◽  
Chain Model ◽  
Growing Period ◽  
Corn Crop ◽  
Order Markov Chain ◽  
Different Growth Stages

ABSTRACT. Results of a climatological study of soil moisture under corn crop at Campina Grande (NE Brazil) are presented in this paper. Daily values of available moisture content during the crop growing period are evaluated for a period of 25 years. A six zone versatile soil moisture budget model is used for this purpose and approximately 5. 7.5, 12.5, 25, 25 and 25% of the available water capacity (AWC) are attributed to zones one to six respectively. Different root activity coefficients are assumed for the six zones in different growth stages and the dependence of these coefficients on moisture content is taken into consideration. The same moisture releasing characteristics are assumed for all soil zones. On rainy days moisture loss due to evapotranspiration is assumed to take place before precipitation. Four AWC values and three corn growing periods between March and September are considered in this study. A first order Markov chain model is applied to the daily soil moisture data. Soil moisture averages and probabilities are used to identify the optimum growing period for corn at this station. The irrigation requirements of the crop are briefly discussed.  

scholarly journals Optimal Irrigation Mode and Spatio-Temporal Variability Characteristics of Soil Moisture Content in Different Growth Stages of Winter Wheat

Water ◽  
2018 ◽  
Vol 10 (9) ◽  
pp. 1180 ◽  
Author(s):  
Yujian Yang ◽  
Yanbo Huang ◽  
Yong Zhang ◽  
Xueqin Tong
Keyword(s):  
Moisture Content ◽  
Winter Wheat ◽  
Time Domain Reflectometry ◽  
Sequential Gaussian Simulation ◽  
Growth Stages ◽  
Evolution Characteristics ◽  
Spatio Temporal ◽  
Jointing Stage ◽  
Gaussian Simulation ◽  
Different Growth Stages

To advance site-specific management of soil volumetric moisture content (VMC), this study analyzed the spatio-temporal evolution characteristics of soil VMC using the method of sequential Gaussian simulation (SGS) during the different growth stages of winter wheat. This was compared with data measured by time domain reflectometry (TDR) which is a well-established electromagnetic technique to measure soil VMC. The spatial autocorrelation coefficient of VMC indicated the strongest clustering of VMC in the tillering stage, and the least clustering of VMC in the harvest stage. A threshold of VMC in topsoil in the jointing stage of winter wheat was put forward. This threshold is 26, signifying that at a lower value, irrigation should be performed and irrigation efficiencies can be improved. Stable and sub-stable areas in the spatial variability maps of VMC were identified in the winter wheat jointing stage. Furthermore, the optimal irrigation stage was the early jointing stage, and irrigation was performed once as a guide. A loose-couple spatial model was constructed using the VMC in topsoil and the volume of water for irrigation. The VMC in the jointing stage of winter wheat was linked with efficient and water-saving irrigation.

Cytokinins from terminal buds of Euphoria longana during different growth stages

1997 ◽  
Vol 99 (1) ◽  
pp. 185-189
Author(s):  
Wen-Shaw Chen ◽  
Kuang-Liang Huang ◽  
Hsiao-Ching Yu
Keyword(s):  
Growth Stages ◽  
Terminal Buds ◽  
Different Growth Stages

Effects of Meteorological Factors at Different Growth Stages on Yield Traits of Maize (Zea maysL.) in Heilonggang Basin

2013 ◽  
Vol 39 (5) ◽  
pp. 919 ◽  
Author(s):  
Bo MING ◽  
Jin-Cheng ZHU ◽  
Hong-Bin TAO ◽  
Li-Na XU ◽  
Bu-Qing GUO ◽  
...  
Keyword(s):  
Meteorological Factors ◽  
Growth Stages ◽  
Yield Traits ◽  
Different Growth Stages
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