Changes in the selenium content in aerial parts of maize varieties, depending on the growing period and soil texture

A study was conducted to quantify agro-climatic and agro-ecological zones in north-west India using 34 years (1980-1914) weather data of twenty two agro-meteorological stations of Jammu & Kashmir, Himachal Pradesh, Uttarakhand, Punjab, Haryana, Chandigarh, Delhi, Uttar Pradesh and Rajasthan. The weather data and the coordinates were converted into decimal system for each meteorological station, for spatial analysis. The map of north-west India was digitized and thermal, humidity, rainfall and moisture index and Length of growing period layers were prepared in the GIS environment using Arc GIS 10.1. These layers were combined by union operation and polygons were grouped into different zones. The moisture index and length of growing period zones were integrated with other spatial input layers of soil texture on logical manner to demarcate different agro-climatic and agro-ecological zones and sub zones. Based on texture the soils of study area were broadly characterized in five classes. North-west India was divided into ten agro-climatic zones as Z-1 to Z-10 and thirty six sub agro-ecological zones which represent homogeneity with respect to climate, growing periods and soil texture, which covers all features of abiotic crop environment. These zones helped to adjust cropping season according to moisture, temperature, vegetations and their combination regime. A shift in climatic belt was observed towards south-west as moist sub humid zone in Haryana which did not exist in old climatic map of Haryana. Itwas a new zone noticed in this state. The south-western limit of dry sub humid zone shifted about 40 km and of semi-arid zone shifted to about 60 km. The study will be very useful in the planning of farming system as well as cropping systems and may fill the gaps in ecological zonation of the area.

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Effectiveness of Amaranthus gangeticus in Arsenic Extraction from Soil

Journal of Scientific Research ◽

10.3329/jsr.v8i1.24359 ◽

2016 ◽

Vol 8 (1) ◽

pp. 71-79 ◽

Cited By ~ 1

Author(s):

F. B. Nasir ◽

S. Islam ◽

G. M. Munna ◽

S. Ray ◽

R. Awal

Keyword(s):

Heavy Metal ◽

Contaminated Soil ◽

Bioconcentration Factor ◽

Translocation Factor ◽

Maximum Accumulation ◽

Growing Period ◽

Aerial Parts ◽

Short Period ◽

Accumulation Capacity ◽

Long Time

Phytoremediation of heavy metal rich soil has become a practical approach nowadays. Though this method is very promising, it requires long time for complete remediation of contaminated soil. Assortment of appropriate plant for specific heavy metal is very important to decontaminate soil within short period of time. The present study was conducted on Amaranthus gangeticus, to find out its potential to remove arsenic (As) from soil within short period of time. Phytoremediation trail was followed by growing plants in varying concentrations of As contaminated soil and subsequently one month of plant growing period it removed 72%-81% of the total soil As. This species accomplish maximum accumulation capacity of 17934 mg/Kgin shoots and store 72%-78% metal in aerial parts. Several parameters that have an influence on phytoremediation potential such as time, concentration, bioconcentration factor (BCF) and translocation factor (TF) were also calculated to investigate its appropriateness as effective hyperaccumulator.

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Determination of Selenium in Teucrium Species by Hydride Generation Atomic Absorption Spectrometry

Zeitschrift für Naturforschung C ◽

10.1515/znc-2003-1-224 ◽

2003 ◽

Vol 58 (1-2) ◽

pp. 143-145 ◽

Cited By ~ 8

Author(s):

Renata Jurišić ◽

Sanda Vladimir-Knežević ◽

Zdenka Kalođera ◽

Jerica Grgić

Keyword(s):

Atomic Absorption Spectrometry ◽

Atomic Absorption ◽

Hydride Generation ◽

Absorption Spectrometry ◽

Cultivated Plants ◽

Selenium Content ◽

Microwave Assisted ◽

Aerial Parts ◽

Sample Dissolution

Hydride generation atomic absorption spectrometry (HGAAS) was applied for determination of selenium content in dried aerial parts of wild and cultivated Teucrium species (Lamiaceae) growing in Croatia: T. arduini L., T. chamaedrys L., T. flavum L., T. montanum L., T. polium L., and T. scordium L. subsp. scordioides Schreb. Special attention was paid to the wet oxidation procedure for the sample dissolution. The proposed procedure involved microwave-assisted sample digestion using a mixture of HNO3/H2O2. Wild specimens generally had a higher content of selenium, with concentrations of 0.030-0.095 mg/kg of the dry drug. Cultivated plants contained 0.020-0.055 mg Se/kg

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Characterisation of rice fallow period for increasing cropping intensity in Khordha district of Odisha

Journal of Agrometeorology ◽

10.54386/jam.v21i3.258 ◽

2021 ◽

Vol 21 (3) ◽

pp. 344-351

Author(s):

S. PATTANAYAK ◽

B.S. RATH ◽

S. PASUPALAK ◽

A.K.B. MOHAPATRA ◽

A. BALIARSINGH ◽

...

Keyword(s):

Soil Texture ◽

Rice Variety ◽

Rabi Season ◽

Cropping Intensity ◽

Fallow Period ◽

Farm Ponds ◽

Growing Period ◽

Initial Seed ◽

Rabi Crops ◽

Water Holding

The possibility of increasing the cropping intensity in Khordha district was assessed by block-wise characterisation of rainfall, soil texture, available water holding capacity of soil and district level temperature during the rice fallow period as well as deciding the appropriate sowing window for both kharif and rabi crops. More than 50% chances of occurrence of wet weeks at the beginning of the kharif season (20-22 SMW) indicated that the summer ploughing and initial seed bed preparation could be taken up during the period followed by sowing of rice from 23 SMW. The 42-43 SMW with greater than 30% initial probability of wet week at 20 mm threshold limit. Considering the length of growing period (LGP) available, the adjustment of rice variety duration by 10-15 days in medium land and advancement of pulse sowing almost by 15 days before harvest of the rice crop (Pira crop) in low land was registered as the best su suitable option for rabi pulses to ensure better utilisation of rice fallow. In addition to these, harvesting surplus water during kharif and storing in farm ponds for judicious utilisation during rabi season further enhanced the possibility of utilisation of rice fallow and increasing the cropping intensity. In the event of delayed monsoon the rice duration has to be adjusted accordingly not to sacrifice the designated suitable period for rabi pulses.

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Mapping of Maize Growing Period over the Free State Province of South Africa: Heat Units Approach

Advances in Meteorology ◽

10.1155/2017/7164068 ◽

2017 ◽

Vol 2017 ◽

pp. 1-11 ◽

Cited By ~ 2

Author(s):

Mokhele Edmond Moeletsi

Keyword(s):

Environmental Parameters ◽

Sowing Date ◽

Water Shortages ◽

Maize Crop ◽

Late Season ◽

Growing Period ◽

Heat Units ◽

Crop Varieties ◽

Sowing Dates ◽

Maize Varieties

Temperature is one of the important environmental parameters that determines the development of a crop from one stage to another. It is integral in the calculation of heat units. In this study, the thermal index concept is used to determine the length of the growing period of short season, medium season, and medium-late season maize crop varieties for different sowing dates (1st dekad of October to 1st dekad of January). The results show high spatiotemporal variation in the median growing period for all three maize varieties. The length of the growing period for the short, medium, and medium-late season varieties is relatively short during October to early December with values in some areas of less than 100, 120, and 120 days, respectively. The duration of the planting period increases exponentially in most places starting from the 2nd dekad of November to 2nd dekad of December, depending on the region and crop variety. Long growing periods are likely to align maize growing period with dates of high frost risk and water shortages. Thus, appropriate choice of sowing date taking into consideration the thermal time requirements of the cultivar is crucial for proper growth and development of the maize crop.

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