scholarly journals YIELD AND QUALITY OF ONION VARIETIES TO THREE SOIL MOISTURE REGIMES IN LYSIMETERS AND FIELD CONDITIONS IN NIGER, WEST AFRICA.

HortScience ◽  
1992 ◽  
Vol 27 (6) ◽  
pp. 587a-587
Author(s):  
CHIT RK PRASHAR ◽  
GOVIND C. SHARMA
Keyword(s):  
Soil Moisture ◽  
Sandy Loam ◽  
Soil Depth ◽  
Field Conditions ◽  
Medium Size ◽  
The Past ◽  
Yield And Quality ◽  
Moisture Regimes ◽  
The Mean

Yield and quality responses to Galmi Violet, Galmi White and Sumrana Violet were studied during 1990-91 and 1991-92 in Maradi region in Niger. Three regimes comprised of irrigating when the soil moisture depletion in 20 cm of soil depth was 40%, 60% and 80%. Investigations were carried out both under field conditions and in the lysimeters. The soil was sandy loam to loam. The lysimeters were 2m×2m×1m drainage type and well set over the past twenty years. The crop was raised during the dry season from October to March with no rainfall. Despite the low temperatures the radiation levels were high. Onion yield was higher under low irrigation regime. The mean yield was 32.5 tons/ha. However, the bulk density was higher under higher moisture regimes. The keeping quality over eight month period was not affected by soil moisture regimes. The bulbs of Sumrana Violet were of medium size whereas the bulbs of Galmi Violet and White were larger size. From a market acceptability standpoint violet onions were preferred over the white ones.

Effect of soil moisture regime, nitrogen and modified urea materials on yield and quality of geranium (Pelargonium graveolens) grown on alfisols

1999 ◽  
Vol 133 (2) ◽  
pp. 203-207 ◽  
Author(s):  
M. SINGH
Keyword(s):  
Soil Moisture ◽  
Field Experiments ◽  
Oil Yield ◽  
Moisture Regime ◽  
Nitrogen Application ◽  
Yield And Quality ◽  
Soil Moisture Regime ◽  
Moisture Regimes ◽  
Modified Urea

Two field experiments were conducted during 1996–98 at Bangalore, India to study the effect of soil moisture regimes (0·3, 0·6 and 0·9 IW:CPE ratios) irrigation water:cumulative pan evaporation (IW:CPE) ratios and three rates of nitrogen application (0, 100 and 200 kg/ha) and in another experiment, three soil moisture regimes (0·3, 0·6 and 0·9 IW: CPE ratios), two rates of nitrogen application (100 and 200 kg/ha) and modified urea materials [prilled urea (PU) and dicyandiamide coated urea (DCDCU)] on oil content, herbage, oil yield and quality of geranium grown on altisols. Soil moisture maintained at 0·6 IW:CPE ratio significantly increased the herbage and oil yields of geranium. Application of 200 kg N/ha gave the maximum herbage and oil yield compared with those obtained from 0 and 100 kg N/ha. DCDCU produced higher yield than PU. The concentration and quality of essential oil were not influenced either by soil-moisture regime, rates or carriers of N.

Weed Infestation, Soil Moisture, Temperature under Mulching Cultivation with Different Films and the Effects on Yield and Quality of Potato

2017 ◽  
Vol 43 (4) ◽  
pp. 571
Author(s):  
Shu-Min ZHANG ◽  
Tang-Yuan NING ◽  
Zhen LIU ◽  
Bin WANG ◽  
Tao SUN ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Yield And Quality ◽  
Weed Infestation

scholarly journals A Multilayer Soil Moisture Dataset Based on the Gravimetric Method in China and Its Characteristics

2019 ◽  
Vol 20 (8) ◽  
pp. 1721-1736 ◽  
Author(s):  
Aihui Wang ◽  
Xueli Shi
Keyword(s):  
Soil Moisture ◽  
Soil Depth ◽  
Linear Trend ◽  
Standardized Precipitation Index ◽  
Gravimetric Method ◽  
Northwest China ◽  
Soil Layers ◽  
Significance Level ◽  
The Mean ◽  
The Standardized Precipitation Index

Abstract Based on the gravimetric-technique-measured soil relative wetness and the observed soil characteristic parameters from 1992 to 2013 in China, this study derives a user-convenient monthly volumetric soil moisture (SM) dataset from 732 stations for five soil layers (10, 20, 50, 70, and 100 cm). The temporal–spatial variations in SM and its relationship with precipitation (Pr) in different subregions are then explored. The magnitude of SM is relatively large in south China and is low in northwest China, and it generally increases with soil depth in each region. The maximum SM appears in spring and/or autumn and the minimum in summer, and the SM seasonality does not vary as distinctly as that of Pr. For the top three soil layers (10-, 20-, and 50-cm levels), the linear trend analysis indicates an overall increasing SM tendency, and the mean trends (averaged across stations with trends passing a 95% significance level test) are 9.35 × 10−7, 7.37 × 10−3, and 2.45 × 10−3 cm3 cm−3 yr−1, respectively. SM memory depends on the soil depth and regions, and it has longer retention time in the deeper layers. Furthermore, the correlation between SM and antecedent Pr varies with soil depth and lag time. The antecedent Pr anomaly (1 or 2 months in advance) can be used to some extent as a surrogate SM anomaly in most regions except for in arid regions. This result is further demonstrated by the relationships between the SM anomaly and the standardized precipitation index. The current SM dataset can be used in various applications, such as validating satellite-retrieved products and model outputs.

An empirical model for drainage from soil under rain fed conditions

Soil Research ◽  
1977 ◽  
Vol 15 (3) ◽  
pp. 205 ◽  
Author(s):  
AR Aston ◽  
FX Dunin
Keyword(s):  
Soil Moisture ◽  
Soil Water ◽  
Empirical Model ◽  
Sandy Loam ◽  
Empirical Relationship ◽  
Field Conditions ◽  
Natural Field ◽  
Moisture Contents ◽  
Weighing Lysimeter

An empirical relationship was derived for drainage from a podzolic sandy loam using a weighing lysimeter at Krawarree, N.S.W. The form of the equation was similar to those used to describe drainage following irrigation. The agreement between computed and measured soil moisture contents over a period of five years was good, and indicated the usefulness of such an approach to characterize drainage of soil water under natural field conditions.

scholarly journals Influence of biogass slurry and urea on yield and quality of okra (Abelmoschus esculentus L.) fruits

2015 ◽  
Vol 16 ◽  
pp. 161-169 ◽  
Author(s):  
K Ghimire ◽  
DM Gautam ◽  
K Mishra ◽  
KR Pande ◽  
A GC
Keyword(s):  
Sandy Loam ◽  
Growth Yield ◽  
Biogas Slurry ◽  
F1 Hybrid ◽  
Yield And Quality ◽  
Hybrid Variety ◽  
Loam Soil ◽  
Number Of Leaves ◽  
Inorganic Chemical

The study was conducted on sandy loam soil at IAAS Rampur, Chitwan during May to September, 2012 to evaluate the effect of different combinations of biogas slurry and urea on production of okra, laid out in a two-factor RCBD with three replications. Altogether ten treatments consist of two varieties namely Arka Anamika - open pollinated and Jaikisan-62-F1 hybrid and four different levels of biogas slurry and urea combination (urea75%+biogas slurry25%, urea50%+biogas slurry50%, urea25%+biogas slurry75% and biogas slurry100%) and only inorganic chemical (75:60:50 kg NPK/ha) as control. All treatments were based on fulfillment of required nitrogen for the crop. The results showed that application of urea50%+biogas slurry50% increased plant height, leaf area, number of leaves and number of nodes at final harvesting. Treatment urea50% + biogas slurry50% allow maximum number of pickings/plant (23.2) and number of fruits/plant (23.5) resulting highest yield/plant (376.3 g). Among the varieties, Jaikisan-62 is superior in terms of growth, yield and post harvest character than Arka Anamika. The net return (Rs. 474,136/ha) and mean B/C ratio was highest (2.59) in Jaikisan-62 treated with urea50%+biogas slurry50%. So, for the commercial production hybrid variety is suggested.

Mouth cavity base defect treated with biosynthetic graft

Biologia ◽  
2006 ◽  
Vol 61 (6) ◽  
Author(s):  
Ján Vojtaššák ◽  
Dušan Poruban ◽  
Dušan Bakoš ◽  
L’udovít Danihel ◽  
Miroslav Korbel’ ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Polyelectrolyte Complex ◽  
Polymeric Membrane ◽  
Medium Size ◽  
Chemically Modified ◽  
Mouth Cavity ◽  
The Past ◽  
Biosynthetic Graft

AbstractThe use of in vitro prepared biosynthetic grafts can considerably improve the patient’s quality of life. This work reports on the use of an autologous graft prepared from a patient’s preputial cells cultivated on biodegradable polymeric membrane. Coladerm membrane is based on the chemically modified polyelectrolyte complex of atelocollagen and hyaluronan. The graft was used to cover a defect in the mouth cavity base and tongue after reconstruction surgery performed at this site in the past. The presented clinical case showed that the autologous biosynthetic graft prepared from foreskin cells can be successfully used for covering of medium-size defects in mouth cavity base resulting in the regeneration of target mouth structures with significant improvement of patient’s quality of life.

EFFECT OF THE PEA APHID, ACYRTHOSIPHON PISUM (HEMIPTERA (HOMOPTERA): APHIDIDAE), ON YIELD AND QUALITY OF FORAGE ALFALFA

1982 ◽  
Vol 114 (6) ◽  
pp. 485-489 ◽  
Author(s):  
A. M. Harper ◽  
M. S. Kaldy
Keyword(s):  
Dry Matter ◽  
Acyrthosiphon Pisum ◽  
Dry Weight ◽  
Pea Aphid ◽  
Yield And Quality ◽  
Nitrogen Free Extract ◽  
Calcium Magnesium ◽  
The Mean ◽  
Limited Change

AbstractThe pea aphid, Acyrthosiphon pisum (Harris), affected yield by significantly reducing the mean height of aphid-susceptible Grimm alfalfa in a greenhouse experiment by 45%, the height of the longest stem by 35%, the green weight by 38%, the dry weight by 44%, and the fiber by 13%. There was limited change in quality of alfalfa. The percentages of protein, fat, total sugar, reducing sugar, dry matter, and nitrogen-free extract were not significantly different in the infested and non-infested alfalfa. Potassium was significantly lower in the infested plants but they contained more calcium, magnesium, and phosphorus. With the exception of isoleucine the amino acid composition was similar in the infested and non-infested alfalfa.

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