Temporal Stability of Soil Moisture in a Large-Field Experiment in Spain

2003 ◽  
Vol 67 (6) ◽  
pp. 1647-1656 ◽  
Author(s):  
José Martínez-Fernández ◽  
Antonio Ceballos
2010 ◽  
Vol 24 (18) ◽  
pp. 2507-2519 ◽  
Author(s):  
Y. Zhao ◽  
S. Peth ◽  
X. Y. Wang ◽  
H. Lin ◽  
R. Horn

Author(s):  
MARION A. WEISSENBERGER-EIBL ◽  
TIM HAMPEL

The not-invented-here (NIH) syndrome describes a negatively-shaped attitude of employees towards externally generated knowledge. Despite being cited as one of the largest barriers in the transfer of external knowledge, empirical evidence on interventions to overcome NIH remains scarce. To address this research gap, we design a brief and specificrecategorisational-intervention on basis of the common in-group identity model in order to change employees’ attitudes towards external knowledge directly. Additionally, we take into account the effects of affirmations as a frequently mentioned countermeasure to NIH and also investigate the role of dual identities in recategorisation. To test our hypothesis, we conducted a large field experiment with a total of 1,097 employees within a multinational organisation. Results revealed that (I) organisational identification and status are positively related to higher levels of NIH, (II) a recategorisational-intervention completely removes the NIH bias and leads to a significant increase in the evaluation of external knowledge.


2021 ◽  
Vol 25 (1) ◽  
pp. 94-107
Author(s):  
M. C. A. Torbenson ◽  
D. W. Stahle ◽  
I. M. Howard ◽  
D. J. Burnette ◽  
D. Griffin ◽  
...  

Abstract Season-to-season persistence of soil moisture drought varies across North America. Such interseasonal autocorrelation can have modest skill in forecasting future conditions several months in advance. Because robust instrumental observations of precipitation span less than 100 years, the temporal stability of the relationship between seasonal moisture anomalies is uncertain. The North American Seasonal Precipitation Atlas (NASPA) is a gridded network of separately reconstructed cool-season (December–April) and warm-season (May–July) precipitation series and offers new insights on the intra-annual changes in drought for up to 2000 years. Here, the NASPA precipitation reconstructions are rescaled to represent the long-term soil moisture balance during the cool season and 3-month-long atmospheric moisture during the warm season. These rescaled seasonal reconstructions are then used to quantify the frequency, magnitude, and spatial extent of cool-season drought that was relieved or reversed during the following summer months. The adjusted seasonal reconstructions reproduce the general patterns of large-scale drought amelioration and termination in the instrumental record during the twentieth century and are used to estimate relief and reversals for the most skillfully reconstructed past 500 years. Subcontinental-to-continental-scale reversals of cool-season drought in the following warm season have been rare, but the reconstructions display periods prior to the instrumental data of increased reversal probabilities for the mid-Atlantic region and the U.S. Southwest. Drought relief at the continental scale may arise in part from macroscale ocean–atmosphere processes, whereas the smaller-scale regional reversals may reflect land surface feedbacks and stochastic variability.


2017 ◽  
Vol 9 (3) ◽  
pp. 1465-1468 ◽  
Author(s):  
Naveen Kumar ◽  
Suresh Kumar ◽  
Parveen Kumar ◽  
Meena Sewhag

A field experiment was conducted during rabi season 2011-2012 at Research Farm, CCS Haryana Agri-cultural University, Hisar, Haryana (India) to study the periodic soil moisture depletion and ground water use by bed planted barley as influenced by cultivars, crop geometry and moisture regimes under shallow water table conditions. The experiment was laid out in split plot design with three replications keeping combinations of three cultivars viz., BH 393, BH 902 and BH 885 and two crop geometries viz 2 rows per bed and 3 rows per bed (70 cm wide with 40 cm top and 30 cm furrow) in main plots and three moisture regimes (irrigation at IW/CPE 0.3, 0.4 & 0.5) in sub plots. The results revealed that maximum soil moisture depletion (105 mm) and ground water contribution (62 mm) were recorded in BH 902, followed by BH 393 and BH 885. Among crop geometries, soil moisture depletion (96.6 mm) and ground water contribution (61 mm) were recorded higher in 3 rows per bed than 2 rows per bed. Among three moisture regimes, the soil moisture depletion (108 mm) and ground water contribution (65 mm) decreased with increase in moisture regime from irrigation at IW/CPE 0.3 to irrigation at IW/CPE 0.4 or 0.5.


1969 ◽  
Vol 50 (2) ◽  
pp. 92-112
Author(s):  
R. Vázquez ◽  
A. Eschenwald-Hess ◽  
M. J. Martínez-Luciano

A field experiment was conducted at Lajas Substation in order to study the effects of four irrigation and three nitrogen levels under three different seeding rates on dry-matter yields of White Native sorghum. The following irrigation treatments were tried: High moisture, plots irrigated when the average soil-moisture suction in the active root-zone reached 0.7 atm.; medium moisture, irrigated when the average soil-moisture suction reached 2.0 atm.; low moisture, irrigated when the average soil-moisture suction reached 5.0 atm., and nonirrigated plots were used as check. The nitrogen levels tested were 40, 80, and 120 pounds per acre per harvest. The seeding rates used were 10, 20, and 30 pounds per acre.


2020 ◽  
pp. 945-958
Author(s):  
Santosh R. Durugkar ◽  
Ramesh C. Poonia ◽  
Radhakrishna B. Naik

The proposed system focuses on utilizing the available water for a home garden in an effective way. The same approach is applicable to agriculture (large field), as our country's economy depends up on the agriculture. Therefore, agriculture is the backbone of Indian economy. In this paper, the authors have proposed a novel approach priority driven scheduling based irrigation model (for home garden) which supplies optimum and good quality water to the crops. The most important part for such system is Wireless Sensor Network which irrigates the plants. The proposed system will be very useful as it immediately irrigates the plant. In this process, soil moisture values will be sensed and compared to find out the lowest value. It means water will be given immediately to such plants where moisture values are low. Such systems will start new era in agriculture and will prove itself as a major requirement in the future due to many critical factors such as irregularity of monsoon, less availability of water, etc.


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