Changes in the water content of maize varieties after physiological maturity

2009 ◽  
Vol 57 (1) ◽  
pp. 41-46 ◽  
Author(s):  
G. Hadi ◽  
S. Kása ◽  
F. Rácz
Keyword(s):  
Moisture Content ◽  
Water Content ◽  
Water Uptake ◽  
Economic Importance ◽  
Significant Extent ◽  
Physiological Maturity ◽  
Moisture Contents ◽  
Grain Moisture ◽  
Maize Varieties ◽  
Random Variation

Changes in the water content of 22 maize varieties were investigated during the period between physiological maturity and harvesting. It was found that neither the grain moisture, the cob moisture, the moisture content of the internode below the ear nor the thousand-kernel mass changed to a statistically significant extent. No significant water uptake or drying in excess of random variation, sufficient to influence the choice of harvesting date, could be detected during the test period.Nevertheless, considerable differences were recorded between the varieties for the moisture contents in the cob and in the internode below the ear. These could be of economic importance in choosing varieties and harvesting dates. The differences between the varieties can be attributed to the diverse genetic backgrounds, suggesting that breeding could lead to the development of maize varieties with low grain moisture at harvest.

scholarly journals Geostatistical analysis for soil moisture content under the no tillage cropping system

2006 ◽  
Vol 63 (4) ◽  
pp. 341-350 ◽  
Author(s):  
Célia Regina Grego ◽  
Sidney Rosa Vieira ◽  
Aline Maria Antonio ◽  
Simone Cristina Della Rosa
Keyword(s):  
Soil Moisture ◽  
Moisture Content ◽  
Spatial Variability ◽  
Water Content ◽  
Spatial Dependence ◽  
Soil Moisture Content ◽  
No Tillage ◽  
Moisture Contents ◽  
Classical Statistics ◽  
Evaluation Point

Experiments in agriculture usually consider the topsoil properties to be uniform in space and, for this reason, often make inadequate use of the results. The objective of this study was to assess the variability for soil moisture content using geostatistical techniques. The experiment was carried out on a Rhodic Ferralsol (typic Haplorthox) in Campinas, SP, Brazil, in an area of 3.42 ha cultivated under the no tillage system, and the sampling was made in a grid of 102 points spaced 10 m x 20 m. Access tubes were inserted down to one meter at each evaluation point in order to measure soil moisture contents (cm³ cm-3) at depths of 30, 60 and 90 cm with a neutron moisture gauge. Samplings were made between the months of August and September of 2003 and in January 2004. The soil moisture content for each sampling date was analyzed using classical statistics in order to appropriately describe the central tendency and dispersion on the data and then using geostatistics to describe the spatial variability. The comparison between the spatial variability for different samplings was made examining scaled semivariograms. Water content was mapped using interpolated values with punctual kriging. The semivariograms showed that, at the 60 cm depth, soil water content had moderate spatial dependence with ranges between 90 and 110 m. However, no spatial dependence was found for 30 and 90 cm depths in 2003. Sampling density was insufficient for an adequate characterization of the spatial variability of soil moisture contents at the 30 and 90 cm depths.

Effect of Sand Moisture Content on Diesel Oil Volatilization

2011 ◽  
Vol 282-283 ◽  
pp. 47-50
Author(s):  
Xue Dong Feng ◽  
Yan Fei Ma
Keyword(s):  
Weight Loss ◽  
Moisture Content ◽  
Ambient Temperature ◽  
Water Content ◽  
Diesel Oil ◽  
Linear Rate ◽  
Moisture Contents ◽  
Sand Surface ◽  
Effect Of Moisture

Volatilization of diesel oil in sand columns was conducted at the ambient temperature of 20 °C by spilling oil on the sand surface. The weight loss of oil was determined by pre and post weight of the sand columns and desiccant was measured on an electronic balance. The aim of this paper was to investigate the effect of moisture content on the volatilization of diesel oil in sand. The results show that the diesel oil and water in sand both volatilize at a linear rate with respect to time. The largest volatilization mass of diesel oil and water reach when the moisture contents are 8% and 20% respectively. Appropriate water content can help to pull the oil contaminants to the surface of the sand.

scholarly journals Effect of Machine Clearance and Maize Moisture Contents on Mechanical Parameters For Local Shelling Machine

2021 ◽  
Vol 910 (1) ◽  
pp. 012016
Author(s):  
Salih K. Alwan Alsharifi ◽  
Aleawi A Ghali ◽  
Hussein R. Nayyef
Keyword(s):  
Moisture Content ◽  
Factorial Experiment ◽  
The Other ◽  
Mechanical Parameters ◽  
Moisture Contents ◽  
Randomized Design ◽  
Grain Moisture ◽  
The Impact ◽  
Corn Grain

Abstract The impact of local thresher machine on maize Syn12 cultivar was tested at two CL - 0.5, and 0.7 mm at three ranges of MOI - 16%, 18%, and 21%. The experiments were conducted in a factorial experiment under a complete randomized design with three replications. The CL- 0.7 mm was significantly more than CL -0.5 mm in all studied parameters. While the corn grain moisture content at a range of 16% was significantly superior compared to the other ranges (18 and 21%) in all parameters. For the CL -0.7mm and MOI 16%, the PP,PR,TE,BR,PCG,WG and GC were 1.566 t.hr-1and 1.715 t.hr-1, 9.155 Kw and 9.028 Kw, 86.009% and 89.587%; 3.228% and 3.064%;2.184% and 2.013; 81.14% and 81.69%and 90.743% and 91.587%, respectively.

scholarly journals Forma e tamanho de grãos de soja para diversos teores de água

2018 ◽  
Vol 39 (6) ◽  
pp. 2821
Author(s):  
Wilker Alves Morais ◽  
Osvaldo Resende ◽  
Fernando Nobre Cunha ◽  
Vitor Marques Vidal ◽  
Nelmício Furtado da Silva ◽  
...  
Keyword(s):  
Moisture Content ◽  
Physical Properties ◽  
Surface Area ◽  
Initial Moisture Content ◽  
Correlation Coefficients ◽  
Volumetric Shrinkage ◽  
Linear Regression Models ◽  
Moisture Contents ◽  
Soybean Cultivars ◽  
Grain Moisture

Physical properties of soybean grains present differences as a function of cultivars and moisture content, with the correlation between physical properties. This study aimed to determine the characteristics related to the physical properties of grains with different moisture contents of three soybean cultivars. The experimental design was completely randomized design in a 3 × 6 factorial scheme with three replications, consisting of three soybean cultivars (6266 RSF IPRO, BMX Potência RR, and 14403Z6001) and six grain moisture contents (11, 13, 15, 17, 19, and 21% wb). Soybean grains presented an initial moisture content of 11.0, 11.0, and 10.8% wb, respectively for 6266 RSF IPRO, BMX Potência RR, and 14403Z6001. The other moisture contents were obtained by soaking in a BOD chamber maintained at 25 °C and 93% of relative humidity. We assessed volume, roundness, sphericity, surface area, volumetric shrinkage, and volumetric shrinkage rate. The data were submitted to the analysis of variance by the F-test (p < 0.05) and when significant, regression analysis was performed for grain moisture contents and the means of cultivars were compared by the Tukey’s test. Pearson’s correlation analysis was also carried out to represent the linearity between grain physical properties. The cultivar BMX Potência RR obtained the highest results for volume, roundness, sphericity, and surface area. Volume and surface area increased as the moisture content of soybean grains increased; the opposite was observed for roundness and sphericity. A linear increase in volumetric shrinkage was observed as moisture content increased. The values of the correlation coefficients of the linear regression models can be used to describe the relationships between physical properties.

scholarly journals EFFECT OF GRAIN MOISTURE OF CORN AT HARVESTING ON SOME AGRONOMIC TRAITS

2016 ◽  
Vol 47 (5) ◽  
Author(s):  
Baktash & Alkazaali
Keyword(s):  
Moisture Content ◽  
Grain Yield ◽  
Seed Production ◽  
Agronomic Traits ◽  
Field Crop ◽  
Spring Season ◽  
College Of Agriculture ◽  
Fall Season ◽  
Moisture Contents ◽  
Grain Moisture

This research was conducted during spring and fall seasons, 2015 , at the fields of Field Crop Department – College of Agriculture –University of Baghdad . The objective was to study the effect of grain moisture at  harvesting on some agronomic traits  of the corn  next  generation , by  using synthetic variety 5018 . In spring season 2015 , seeds of this variety  was planted ,when  moisture of the ear grains was (37-42%) , ten ears were harvested. Ear harvesting dates were performed manually when the grains had 37-42% , 34-36% , 30-33% , 25- 28% and 19-22%  moisture content. In fall season  2015 , varietal trail was carried out to the five treatment materials , using Randomized Complete Bock Design , with four replicates. The results  revealed , that non significant differences between treatments (19-22)%  and  (25-28)% , in all the studied traits . The plants  grown from the seeds of (25-28)%, were produced  highest vegetative mass (116.30 g.plant-1) , total dray matter (269 g. plant-1) and total dray matter ( 1.80  kg.m-2 ) . Highest grain yield ( 1.07  kg.m-2 ) and harvesting index ( 0.63) were produced from plants grown from  seeds harvested  with (19-22)%  moisture content . It can be concluded  that the best moisture contents of the grains for seed production was (19-28)%.

Formation of Black Droplets from Coal Biosolubilization

2012 ◽  
Vol 524-527 ◽  
pp. 993-996
Author(s):  
Kai Yi Shi ◽  
Xiu Xiang Tao ◽  
Zhi Li ◽  
De Shun Kong ◽  
Su Dong Yin
Keyword(s):  
Moisture Content ◽  
Water Content ◽  
Culture Media ◽  
Contact Angles ◽  
Ftir Spectra ◽  
Moisture Contents ◽  
Hypocrea Lixii ◽  
Coal Biosolubilization ◽  
High Polarity

To study mechanisms of coal biosolubilization, this paper investigated the formation of black droplets on the surface of Sabouraud maltose agar (SMA) culture media through coal solubilisation by Hypocrea lixii AH. The black droplets were collected and weighted. Mycelia of Hypocrea lixii AH were characterized by (Full name is required before abbreviation) FTIR spectra and contact angles. The results showed that the first 9 days are black droplets permeation period, solubilized coal in coal pole keep place due to increase of polarity with mycelia aging. Moisture content of the black droplets was 96.4(±0.2) %, largely resulting in high-polarity property of the black droplets. Furthermore, the comparison on moisture contents of coal and black droplets indicated that the water content of black droplets were from the culture media and bio-oxidation instead of coal self.

VARIATION OF ELECTRICAL RESISTIVITY OF RIVER SANDS, CALCITE, AND QUARTZ POWDERS WITH WATER CONTENT

Geophysics ◽  
1962 ◽  
Vol 27 (4) ◽  
pp. 470-479 ◽  
Author(s):  
V. V. Jagannadha Sarma ◽  
V. Bhaskara Rao
Keyword(s):  
Grain Size ◽  
Electrical Resistivity ◽  
Moisture Content ◽  
Water Content ◽  
Saturation Index ◽  
Clay Particles ◽  
Moisture Contents ◽  
Grain Sizes ◽  
Critical Moisture

Electrical resistivity variations of samples of graded river sands, calcite, and quartz powders are studied for different moisture contents of varying salinities. The variations exhibit a general hyperbolic trend. For the same grain size, the critical saturation index of a sample is constant and independent of the salinity of moisture content. The smaller the grain size, the larger the saturation index. The critical saturation index of a sample is correlated with its retentive capacity, and it is shown, from studies of the quartz samples, that, for grain sizes of the order of clay particles, the critical moisture would reach 100 percent.

scholarly journals Desiccation sensitivity of wild Castanea mollissima Blume determined by differential scanning calorimetry

2020 ◽  
Vol 49 (4) ◽  
pp. 975-980
Author(s):  
Biao Han ◽  
Lu Lu ◽  
Su-Juan Guo ◽  
Wen-Qing Li ◽  
Xiao-Man Xie
Keyword(s):  
Thermal Properties ◽  
Moisture Content ◽  
Water Content ◽  
Exothermic Peak ◽  
Onset Temperature ◽  
Unfrozen Water ◽  
Scanning Calorimetry ◽  
Moisture Contents ◽  
Unfrozen Water Content ◽  
Castanea Mollissima

Thermal properties of wild Castanea mollissima seeds embryos with different moisture contents, and the optimal moisture contents for cryopreservation were studied. Seeds of similar size and weight (3.5 ± 0.3g) were put in silica gel at 0 to 7 days, embryo moisture content, viability and thermal properties were measured everyday. The results showed that the onset temperature and the crystallization peak of the mean enthalpy decreased with the decrease of embryo moisture content. Exothermic peak disappeared when the seeds were dried for 4 days, with an embryo moisture content of 0.45 ± 0.15 gH2O/g dw. The unfrozen water content (WCu) was 0.247 gH2O/g dw. The optimal water content was found to be 0.45 ± 0.15 gH2O/g dw, with the survival of 76.2%. Castanea mollissima embryonic axes dehydration needs comprehensive consideration of exothermic peak, unfrozen water content, onset temperature and viability loss.

scholarly journals LOSSES INCURRED IN SOYBEAN DEPENDING ON THE WATER CONTENT AT GRAINS HARVEST

2019 ◽  
Vol 94 (1) ◽  
pp. 37
Author(s):  
Fernando Shintate Galindo ◽  
João Luis Zocoler ◽  
Marcelo Carvalho Minhoto Teixeira Filho ◽  
Salatiér Buzetti ◽  
José Mateus Kondo Santini ◽  
...  
Keyword(s):  
Experimental Design ◽  
Water Content ◽  
Kernel Weight ◽  
Potential Yield ◽  
Physiological Maturity ◽  
Final Population ◽  
Grain Moisture ◽  
Water Contents ◽  
Natural Drying ◽  
The Ideal

The objective of this work was to study the ideal water content at grains at harvest of soybean crop, yield and production components as well as losses from natural drying in the field at different water contents at grains harvest. The experimental design was of randomized blocks with 4 repetitions and the treatments consisted in the harvest of the following average levels of water contents of grains on a wet basis: 37.9 (point of full physiological maturity), 20.2, 18.7, 15.6, 14.4, and 13.1%. The final population of plants, 100-kernel weight and potential yield of grains linearly decreased with the reduction of grain moisture content at harvest, however, the anticipation of the soybean harvest causes higher losses, with ideal harvesting point close to 13% moisture (W.B.).

Maturation of sunflower

1975 ◽  
Vol 15 (77) ◽  
pp. 833 ◽  
Author(s):  
WK Anderson
Keyword(s):  
Fatty Acids ◽  
Oleic Acid ◽  
Fatty Acid ◽  
Moisture Content ◽  
Oil Content ◽  
New South ◽  
Dry Weight ◽  
Physiological Maturity ◽  
Moisture Contents ◽  
South Wales

Maturation of sunflowers was recorded in two field sowings at Armidale, New South Wales. Measurements were made to define anthesis, the accumulation of dry weight, oil and fatty acids in the achenes and to determine moisture contents and crop appearance associated with achene maturation. It is suggested that anthesis may be described either as its mid-point, i.e. when 50% of capitula exhibit anthesis over half their area, or by its spread, i.e. the time between 50% of capitula commenced anthesis and 50 %completed anthesis. Maximum achene dry weight was reached in the field when the achene moisture content was about 40 and the capitulum moisture content was about 70%. Both achene oil content and the content of the major polyunsaturated fatty acid (linoleic) reached their maxima at about the same time as achene dry weight in the field and this point was thus defined as 'physiological' maturity for sunflowers. It corresponded to when about ten per cent of capitula had turned brown. Production of linoleic and oleic acid was found to predominate in the later stages of achene maturation in both field sowings.

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