scholarly journals PENGUKURAN KANDUNGAN AIR TANAH PADA PERTANAMAN JARAK PAGAR (JATROPHA CURCAS L.) SOIL WATER CONTENT MEASUREMENT UNDER JATROPHA CROP (JATROPHA CURCAS L.)

Agromet ◽  
2009 ◽  
Vol 23 (1) ◽  
pp. 20 ◽  
Author(s):  
Gusti Rusmayadi ◽  
Bregas Budianto
Keyword(s):  
Water Content ◽  
Soil Water ◽  
Soil Water Content ◽  
Jatropha Curcas ◽  
Crop Production ◽  
Large Scale ◽  
Rainfall Condition ◽  
Moisture Sensor ◽  
Jatropha Curcas L ◽  
Four Levels

<p>Management strategies development for efficient water utilization of crop production requires sensitive measurements of changes in soil water content on a dynamic basis. Many of the methods currently used for measuring these changes are destructive, slow, or relatively expensive for large-scale investigations. A sensor that low-cost, nondestructive soil moisture sensor for measuring changes in soil volumetric water content on the basis of changes in the dielectric constant of the soil water were available. So, this research was carried out to quantify soil water content on Jatropha under rainfall condition, four levels of nitrogen fertilizer (N) and two population densities (P). The experiments used a systematic Nelder fan design with 9 spokes and 4 rings were conducted at SEAMEO-BIOTROP field experiment in 2007. Based on evaluation this instrument can use to measurement soil water content in various environment.</p>

scholarly journals Effects of water deficit on the growth and yield formation of maize (Zea mays L.)

2017 ◽  
pp. 143-148
Author(s):  
Mahama Salifu
Keyword(s):  
Water Content ◽  
Soil Water ◽  
Soil Water Content ◽  
Water Deficit ◽  
Crop Production ◽  
Water Holding Capacity ◽  
Field Soil ◽  
The World ◽  
Soil Water Holding Capacity ◽  
Water Holding

Maize (Zea mays L.) is the most important consuming cereal crop in the world after rice and wheat. This requires an understanding of various management practices as well as conditions that affect maize crop performance. Water deficit stress during crop production is one of the most serious threats to crop production in most parts of the world and drought stress or water deficit is an inevitable and recurring feature of global agriculture and it is against this background that field study of crops response to water deficit is very important to crop producer and researchers to maximize yield and improve crop production in this era of unpredicted climatic changes the world over.A pot experiment was carried out to determine the effects of water deficit on growth and yield formation of maize. Two maize cultivars were used Xundan20 and Zhongdan5485. Three levels of soil water content were used in two stages of water control levels at two stages of the maize plant development1. The JOINTING STAGE: A. CONTROL (CK) soil water content: from 70% to 80% of soil water holding capacity at the field, soil water content: from 55% to 65% of soil water holding capacity at the field, soil water content: from 40% to 50% of the Soil water holding capacity at the field.2. The BIG FLARE PERIOD: A. CONTROL (CK) soil water content: from 75% to 85% of soil water holding capacity at the field, soil water content: from 58% to 68% of soil water holding capacity at the field, soil water content: from 45% to 55% of the soil water holding capacity at the field.This research mainly studied the effects of water deficit on physiological, morphology and the agronomical characteristics of the maize plant at the different water stress levels.The importance of these results in this experiment will enable plant producers to focus and have a fair idea as to which stage of the maize plant’s development that much attention must be given to in terms of water supply.

Quasi-distributed fiber-optic in-situ monitoring technology for large-scale measurement of soil water content and its application

2021 ◽  
Vol 294 ◽  
pp. 106373
Author(s):  
Meng-Ya Sun ◽  
Bin Shi ◽  
Cheng-Cheng Zhang ◽  
Xing Zheng ◽  
Jun-Yi Guo ◽  
...  
Keyword(s):  
Water Content ◽  
Soil Water ◽  
Soil Water Content ◽  
Large Scale ◽  
Fiber Optic ◽  
In Situ Monitoring ◽  
Monitoring Technology

Validating the BERMS in situ Soil Water Content Data Record with a Large Scale Temporary Network

2013 ◽  
Vol 12 (2) ◽  
pp. vzj2012.0151 ◽  
Author(s):  
Michael H. Cosh ◽  
Thomas J. Jackson ◽  
Craig Smith ◽  
Brenda Toth ◽  
Aaron A. Berg
Keyword(s):  
Water Content ◽  
Soil Water ◽  
Soil Water Content ◽  
Large Scale ◽  
Temporary Network ◽  
Data Record

scholarly journals Does <i>Jatropha curcas</i> L. show resistance to drought in the Sahelian zone of West Africa? A case study from Burkina Faso

2015 ◽  
Vol 7 (1) ◽  
pp. 639-659
Author(s):  
P. Bayen ◽  
T. K. Sop ◽  
A. M. Lykke ◽  
A. Thiombiano
Keyword(s):  
Survival Rate ◽  
Burkina Faso ◽  
Water Content ◽  
Soil Water ◽  
Soil Water Content ◽  
Land Degradation ◽  
Jatropha Curcas ◽  
Sub Saharan Africa ◽  
Restoration Technique ◽  
Sahelian Zone

Abstract. Land degradation is an environmental problem which weakens agro-silvo-pastoral productivity in Sub-Saharan Africa. The most common manifestation of land degradation is the appearance of denuded land. We carried out an experiment to test the effect of three soil and water conservation techniques on survival and growth of Jatropha curcas seedlings transplanted onto two completely denuded lands in the Sahelian and Sudanian zones of Burkina Faso. We implemented an experimental design with three replicates per restoration technique. A total of 174 seedlings were planted in each study site. The results showed that soil water content varied according to the restoration technique used (df = 2; F = 53.21; p < 0.00) as well as according to study site (df = 1; F = 74.48; p < 0.00). Soil water content was significantly lower in the Sahel than in the Sudanian zone. Seedling survival rate varied significantly according to technique used (df = 2; F = 8.91; p = 0.000) and study site (df = 1; F = 9.74; p = 0.003). Survival rate, diameter and seedling height were highest at the Sudanian site. At the Sahelian site, all seedlings died two years after establishment. These results suggest that Jatropha curcas is unsuited to denuded land in the Sahelian zone. Most of the plants died in the Sahel between April and May, which is the peak of the dry season; this may be an indication that Jatropha may not be as drought-resistant as suggested by the prolific literature which has reported on diverse claims surrounding this plant.

Effect of Different Management Systems on Soil Water Content in the Black Soil of Northeast China

2012 ◽  
Vol 610-613 ◽  
pp. 2912-2915 ◽  
Author(s):  
Shi Xiu Zhang ◽  
Zhi Yong Zhang ◽  
Si Wei Jiang ◽  
Jun Yu
Keyword(s):  
Organic Matter ◽  
Water Content ◽  
Soil Water ◽  
Soil Water Content ◽  
Northeast China ◽  
Large Scale ◽  
Management Practices ◽  
Black Soil ◽  
Management Systems ◽  
Positive Effects

Soil water content is considered to be one of the most important factors affecting crop productivity. In this study, the different management practices were investigated in the black soil of Northeast China to evaluate the efficacy of practices on soil water content. The results showed that the application of organic matter, large-scale machine and residues retention have positive effects on soil water content. Saturated water content (SWC), field water-holding capacity (WHC), and available water content (AWC) were strongly correlated with soil bulk density and soil organic matter. Our results suggested that proper management systems could improve soil water use efficiency in black soil region of Northeast China.

scholarly journals Does <i>Jatropha curcas</i> L. show resistance to drought in the Sahelian zone of West Africa? A case study from Burkina Faso

Solid Earth ◽  
2015 ◽  
Vol 6 (2) ◽  
pp. 525-531 ◽  
Author(s):  
P. Bayen ◽  
T. K. Sop ◽  
A. M. Lykke ◽  
A. Thiombiano
Keyword(s):  
Survival Rate ◽  
Burkina Faso ◽  
Water Content ◽  
Soil Water ◽  
Soil Water Content ◽  
Land Degradation ◽  
Jatropha Curcas ◽  
Sub Saharan Africa ◽  
Restoration Technique ◽  
Sahelian Zone

Abstract. Land degradation is an environmental problem which weakens agro-sylvo-pastoral productivity in sub-Saharan Africa. The most common manifestation of land degradation is the appearance of denuded land. We carried out an experiment to test the effect of three soil and water conservation techniques on survival and growth of Jatropha curcas seedlings transplanted onto two completely denuded lands in the Sahelian and Sudanian zones of Burkina Faso. We implemented an experimental design with three replicates per restoration technique. A total of 174 seedlings were planted in each study site. The results showed that the soil water content varied according to the restoration technique used (df = 2; F = 53.21; p < 0.00) as well as according to study site (df = 1; F = 74.48; p < 0.00). Soil water content was significantly lower in the Sahel than in the Sudanian zone. Seedling survival rate varied significantly according to technique used (df = 2; F = 8.91; p = 0.000) and study site (df = 1; F = 9.74; p = 0.003). Survival rate, diameter and seedling height were highest at the Sudanian site. At the Sahelian site, all seedlings died 2 years after establishment. These results suggest that J. curcas is unsuited to denuded land in the Sahelian zone. Most of the plants died in the Sahel between April and May, which is the peak of the dry season; this may be an indication that J. curcas may not be as drought-resistant as suggested by the prolific literature which has reported on diverse claims surrounding this plant.

Seasonal and inter-annual photosynthetic response of representative C4 species to soil water content and leaf nitrogen concentration across a tropical seasonal floodplain

2008 ◽  
Vol 24 (2) ◽  
pp. 201-213 ◽  
Author(s):  
K. B. Mantlana ◽  
A. Arneth ◽  
E. M. Veenendaal ◽  
P. Wohland ◽  
P. Wolski ◽  
...  
Keyword(s):  
Water Content ◽  
Soil Water ◽  
Soil Water Content ◽  
Large Scale ◽  
Annual Variation ◽  
Nitrogen Concentration ◽  
Leaf Nitrogen ◽  
Imperata Cylindrica ◽  
Growth Environment ◽  
Okavango River

AbstractWe examined the seasonal and inter-annual variation of leaf-level photosynthetic characteristics of three C4 perennial species, Cyperus articulatus, Panicum repens and Imperata cylindrica, and their response to environmental variables, to determine comparative physiological responses of plants representing particular microhabitats within a seasonal tropical floodplain in the Okavango River Delta, Botswana. Five measurement campaigns were carried out over a period of 2 y which covered two early rainy seasons, two late rainy seasons and one dry season. For all three species, light-saturated net photosynthetic rates (Asat) and stomatal conductance (gsat) decreased with decreasing soil water content with a seasonal range for Asat of approximately 5–45 μmol m−2 s−1, and for gsat of 0.03–0.35 mol m−2 s−1. The species representing the wettest microhabitat (Cyperus) had the highest gsat at low leaf-to-air vapour pressure deficits (Dl), the highest ratio of intercellular to ambient CO2 concentration (Ci/Ca), as well as the highest degree of variation in Ci/Ca from season to season. We interpret this as being indicative of its adaptation to a moist growth environment allowing for non-conservative water use strategies as soil moisture is usually abundant. For all three species there was significant variation in photosynthetic fluxes from one year to another that was related to variation in leaf nitrogen and phosphorus. This study shows that when assessing the role of savanna stands in large-scale carbon balance models, the remarkable inter-annual variation in leaf photosynthesis reported in this study should be taken into account.

SOIL WATER CONTENT AFFECTS THE AVAILABILITY OF PHOSPHATE

1985 ◽  
pp. 185-189
Author(s):  
M.C.H.Mouat Pieter Nes
Keyword(s):  
Water Content ◽  
Soil Water ◽  
Soil Water Content ◽  
Soil Solution ◽  
Equivalent Reduction

Reduction in water content of a soil increased the concentration of ammonium and nitrate in solution, but had no effect on the concentration of phosphate. The corresponding reduction in the quantity of phosphate in solution caused an equivalent reduction in the response of ryegrass to applied phosphate. Keywords: soil solution, soil water content, phosphate, ryegrass, nutrition.

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