scholarly journals Profile distribution of available nutrients in a Vertisol and Inceptisol as influenced by irrigated and rainfed cotton crops

2021 ◽  
pp. 187-196
Author(s):  
Suresh Bambhaneeya ◽  
N. H. Garaniya ◽  
K. H. Patel ◽  
Vaishali Surve
Keyword(s):  
Available N ◽  
Available Nutrients ◽  
Profile Distribution ◽  
Very High ◽  
Course Of Study

Current study was conducted in cotton growing belt of South Gujarat (Gujarat) i.e. in 11 talukas namely, Bharuch, Surat, Jhagadia, Jambusar, Amod, Vagra, Narmada, Tilakwada, Dediapada, Sagbara and Hansot. To fullfil the objectives of present research GPS based 22 nos. of pedons representative (11 irrigated and 11 rainfed situation) were dug out, studied and depth-wise samples (0-15, 15-30, 30-60, 60-90 and 90-120 cm) of above 11 talukas were collected. During course of study it was observed that available N, P2O5, K2O, S and DTPA-Fe and Zn in irrigated pedons, varied respectively from 111.4 to 303.2 kg ha-1 (low to medium), 17.1 to 63.3 kg ha-1 (low to high), 221.4 to 1164.8 kg ha-1 (medium to very high), 6.5 to 20.1 ppm (low to marginally high), 2.47 to 10.42 mg kg-1 (low to high) and 0.06 to 0.51 mg kg-1 (low to medium), while the corresponding values of rainfed pedons were 94.7 to 299.8 kg ha-1 (low), 10.8 to 57.1 kg ha-1 (low to marginally high), 160.7 to 1180.7 kg ha-1 (medium to very high), 6.2 to 18.7 ppm (low to medium), 1.63 to 10.27 mg kg-1 (low to high), and 0.08 to 0.48 mg kg-1 (low), respectively. Means of above available nutrients were found slightly higher under irrigated situations in comparison compared to those of rainfed situation.

scholarly journals Impact of different cropping systems on properties of soil and water in different micro watersheds

2014 ◽  
Vol 6 (2) ◽  
pp. 524-529
Author(s):  
Surve Nilam ◽  
D. P. Patel ◽  
P. K. Shrivastava ◽  
K. F. Satasiya
Keyword(s):  
Ground Water ◽  
Cropping Systems ◽  
Cropping System ◽  
Infiltration Rate ◽  
Organic Carbon Content ◽  
University Campus ◽  
Available N ◽  
Topographic Features ◽  
Sodium Percent ◽  
Very High

Studies on soils of Navsari Agricultural University (NAU) having different cropping system were carried out in the four micro watersheds that exist in the 400 ha University campus. Soil samples from 0-15 cm depth and water samples from adjacent bore wells were collected and analyzed from different locations of micro watersheds. Soils of watersheds showed that soils texture was clay in nature, having more than 65 % clay, whereas silt was more in watershed ‘A’. Soil organic carbon content (SOC) was 0.32 %, found in the field near University play ground and the highest 0.88 %, in Forestry farm, thus underlining the need of forest species in agricultural farms. SOC levels have reduced significantly due to intensive cultivation in all the watersheds. The result of exchangeable sodium percent (ESP) is supported by the topographic features, as, ESP was more in watershed ‘B’ (5.15) than C (2.95), this showed that infiltration rate was lesser in ‘B’ as compared to ‘C’ due to availability of more sodium (Na). Available N was highest in watershed ‘A’ (246 kg/ha) followed by ‘C’ (225 kg/ha) than ‘B’ (203 kg/ha), the reason was watershed ‘A’ had only horticulture crops whereas B and C had different crops of the region. Electrical conductivity (EC) of ground water collected from wells in watershed ‘C’ was found to be very high both before (3.44 dS/m) and after monsoon (2.95 dS/m), showing that water is highly saline and not fit for surface irrigation and there is need of ground water recharging.

Study on irrigation water quality in some minor lift irrigation schemes and its impact on soil characteristics

2019 ◽  
Vol 5 (02) ◽  
pp. 262-265
Author(s):  
Sanjay Swami
Keyword(s):  
Irrigation Water ◽  
Water Samples ◽  
High Salinity ◽  
Chemical Properties ◽  
Soil Characteristics ◽  
Quality Parameters ◽  
Available N ◽  
Available Nutrients ◽  
Standard Procedures ◽  
Physico Chemical

The quality parameters of irrigation water in some minor lift irrigation schemes on Bhor nallah, Chatha farm at Gidergalion were evaluated and their impacts on soil characteristics in the fringe areas of Ranvir canal and non command were studied. Irrigation water samples at monthly intervals were collected and analyzed for pH, Electrical conductivity (EC), Sodium Adsorption Ratio (SAR), Magnesium Hazards (MH) and Residual Sodium Carbonate (RSC) by following standard methods. The soil samples from the concern command and adjoining areas (non command) were also collected and analyzed for important physico chemical properties and available nutrients as per standard procedures. Results revealed that majority of water samples collected from minor lift irrigation schemes on Bhor and Balal nallahs containing municipal/industrial waste was under high salinity-low SAR category, whereas water samples of Ranbir Canal at Gidergalian falls under medium salinity-low SAR. The soil characteristics viz. pH, EC, OC and available N, P and K were higher in command soils of Bhor and Chatha as compared to non command soils of Gidergalian and Dharap.

scholarly journals Nutrient saturation of crop monocultures and agroforestry indicated by nutrient response efficiency

2020 ◽  
Author(s):  
Marcus Schmidt ◽  
Marife D. Corre ◽  
Bomin Kim ◽  
Julia Morley ◽  
Leonie Göbel ◽  
...  
Keyword(s):  
Crop Yield ◽  
Alley Cropping ◽  
Nutrient Retention ◽  
Agroforestry Systems ◽  
Similar Reduction ◽  
Available N ◽  
Nutrient Response ◽  
Beneficial Effects ◽  
Available Nutrients ◽  
Ecologically Sustainable

AbstractEfficient use of nutrients is a key requisite for a sustainable intensification of agriculture in order to meet the increasing global crop demand while minimizing deleterious environmental impacts. Agroforestry systems exhibit tree–crop interactions, which potentially contribute to nutrient-efficient agro-ecosystems. Our goal was to determine whether the conversion from cropland monocultures to alley-cropping agroforestry increases nutrient response efficiency (NRE), the ability of plants to convert available nutrients into biomass. We found that crop yield, plant-available nutrients and NRE were comparable between agroforestry and monocultures, but the trees in agroforestry had high NRE, contributing to nutrient retention of the agroforestry systems as a whole. The unimodal relationship of the crops’ NRE with plant-available nutrients suggests that NRE values were beyond optimum in both agroforestry and monoculture indicating nutrient saturation. This indicates that fertilizer inputs can be reduced (or optimized) without sacrificing crop yield or profit. Based on the NRE curves, we assessed that a reduction of plant-available N by 50% would lead to a decrease in crop yield by 17% and a concomitant increase in N response efficiency by 67%, whereas a similar reduction of plant-available P would lead to a decrease in crop yield by 8% with an increase in P response efficiency by 83%. An optimized fertilization to achieve such lower levels of plant-available nutrients will have beneficial effects on nutrient retention and redistribution. Optimizing fertilizer input will make alley-cropping agroforestry a productive and profitable agro-ecosystem that contributes to an ecologically sustainable agriculture.

scholarly journals Soil Fertility Appraisal for Pea Growing Regions of Himachal Pradesh using GPS and GIS Techniques

2020 ◽  
Author(s):  
Nishant Thakur ◽  
Rakesh Sharma ◽  
Anil Kumar ◽  
Kunal Sood
Keyword(s):  
Electrical Conductivity ◽  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Soil Fertility ◽  
Soil Properties ◽  
Soil Samples ◽  
Available N ◽  
Available Nutrients ◽  
Fertility Status ◽  
Cu And Zn

Background: Overexploitation of productive lands creates serious problem of lowering the fertility status of soil and it leads to deterioration of soil. The deficiency of nutrients directly affects on the growth of crops and crop response become poor. Pea crop, like other plants, need different nutrients in varying quantities to achieve optimum growth and productivity. Soil fertility and its productivity are mainly affected by soil properties and nutrient status. Hence, it is necessary to assess the fertility status of soil with the consideration of available nutrients in soils and to recommend the specific nutrients for the proper management of soil. Methods: In this field-laboratory investigation during 2017-2019, about 135 geo-referenced soil samples were collected from 49 pea growing locations/ villages of Gohar and Sundernagar blocks of Mandi district. The collected (0-15 cm) soil samples were analyzed for different soil properties such as pH, electrical conductivity, soil organic carbon and available N, P, K, Ca, Mg, S, Fe, Mn, Cu and Zn content. Different thematic maps were prepared using Arc-GIS software version 10.2.1.Result: The investigations revealed that the soils were acidic to neutral in soil reaction and are in safe limits of electrical conductivity as the values were less than 0.8 dS m-1. Soil organic carbon status was found to be medium to high in surface layer. About 94.8 and 22.2% soil samples were recorded deficient in available N and Zn, whereas K, Cu and Zn were moderate in 53.3, 28.1 and 55.6% samples, respectively. On the basis of coefficient of variation, the soil pH and exchangeable Ca are least variable, whereas, available nutrients like N, Ca, Mg, Fe and Mn are moderately variable. However, electrical conductivity, OC, available P, K, S, Cu and Zn are highly variable in the samples under investigation. This information will also help to adopt effective strategy on fertilizer use and cropping pattern.

Fertilizer response for hybrid and open-pollinated canola and economic optimal nutrient levels

2010 ◽  
Vol 90 (3) ◽  
pp. 305-310 ◽  
Author(s):  
E G Smith ◽  
B M Upadhyay ◽  
M L Favret ◽  
R E Karamanos
Keyword(s):  
Yield Response ◽  
Available Phosphorus ◽  
Soil Test ◽  
Fertilizer Response ◽  
Brassica Napus L ◽  
Yield Data ◽  
Available N ◽  
Available Nutrients ◽  
Fertilizer Recommendations ◽  
N Fertility

Hybrid (HY) canola (Brassica napus L.) produces a higher seed yield than open-pollinated (OP) canola. While it is expected higher-yielding HY canola may require higher total available nutrients, especially nitrogen (N), the evidence is not conclusive. This study used canola yield data from several site-years and fertility experiments to determine whether HY and OP canola types require different rates of total available N (TAN) and total available phosphorus (TAP). The yield response of the two canola genotypes to TAP was the same, but for TAN the yield response was greater for HY canola. The quadratic yield response results were confirmed using three plateau equations. Optimal TAN for HY canola was higher than for OP canola. Soil test laboratories and producers growing HY canola need to modify N fertility for HY canola, compared with OP canola for which most of the current N fertilizer recommendations were developed. Key words: Economics, fertilizer, yield response, canola, hybrid, open-pollinated

Very High Resolution Analysis of the Dynamics of a Coronal Plasmoid

1994 ◽  
Vol 144 ◽  
pp. 593-596
Author(s):  
O. Bouchard ◽  
S. Koutchmy ◽  
L. November ◽  
J.-C. Vial ◽  
J. B. Zirker
Keyword(s):  
High Resolution ◽  
Solar Eclipse ◽  
Total Solar Eclipse ◽  
Field Of View ◽  
Small Field ◽  
High Resolution Analysis ◽  
Ccd Observations ◽  
Resolution Analysis ◽  
Very High ◽  
Small Field Of View

AbstractWe present the results of the analysis of a movie taken over a small field of view in the intermediate corona at a spatial resolution of 0.5“, a temporal resolution of 1 s and a spectral passband of 7 nm. These CCD observations were made at the prime focus of the 3.6 m aperture CFHT telescope during the 1991 total solar eclipse.

Monte Carlo Algorithms for Moments of Transition Arrays

1988 ◽  
Vol 102 ◽  
pp. 79-81
Author(s):  
A. Goldberg ◽  
S.D. Bloom
Keyword(s):  
Monte Carlo ◽  
State Vector ◽  
Basis Vector ◽  
Collective State ◽  
Dispersion Characteristics ◽  
Dipole Strength ◽  
The Third ◽  
Monte Carlo Algorithms ◽  
Third Moment ◽  
Very High

AbstractClosed expressions for the first, second, and (in some cases) the third moment of atomic transition arrays now exist. Recently a method has been developed for getting to very high moments (up to the 12th and beyond) in cases where a “collective” state-vector (i.e. a state-vector containing the entire electric dipole strength) can be created from each eigenstate in the parent configuration. Both of these approaches give exact results. Herein we describe astatistical(or Monte Carlo) approach which requires onlyonerepresentative state-vector |RV> for the entire parent manifold to get estimates of transition moments of high order. The representation is achieved through the random amplitudes associated with each basis vector making up |RV>. This also gives rise to the dispersion characterizing the method, which has been applied to a system (in the M shell) with≈250,000 lines where we have calculated up to the 5th moment. It turns out that the dispersion in the moments decreases with the size of the manifold, making its application to very big systems statistically advantageous. A discussion of the method and these dispersion characteristics will be presented.

Decomposition of the metastable beta titanium alloy Ti-15-3

1983 ◽  
Vol 41 ◽  
pp. 264-265
Author(s):  
Y. L. Chen ◽  
S. Fujlshiro
Keyword(s):  
Low Cost ◽  
High Strength ◽  
Alpha Phase ◽  
Thick Sheet ◽  
Omega Phase ◽  
Beta Titanium Alloy ◽  
Beta Titanium ◽  
Beta Matrix ◽  
Metastable Beta ◽  
Very High

Metastable beta titanium alloys have been known to have numerous advantages such as cold formability, high strength, good fracture resistance, deep hardenability, and cost effectiveness. Very high strength is obtainable by precipitation of the hexagonal alpha phase in a bcc beta matrix in these alloys. Precipitation hardening in the metastable beta alloys may also result from the formation of transition phases such as omega phase. Ti-15-3 (Ti-15V- 3Cr-3Al-3Sn) has been developed recently by TIMET and USAF for low cost sheet metal applications. The purpose of the present study was to examine the aging characteristics in this alloy.The composition of the as-received material is: 14.7 V, 3.14 Cr, 3.05 Al, 2.26 Sn, and 0.145 Fe. The beta transus temperature as determined by optical metallographic method was about 770°C. Specimen coupons were prepared from a mill-annealed 1.2 mm thick sheet, and solution treated at 827°C for 2 hr in argon, then water quenched. Aging was also done in argon at temperatures ranging from 316 to 616°C for various times.

Deformation Replication

1970 ◽  
Vol 28 ◽  
pp. 280-281
Author(s):  
J. Temple Black
Keyword(s):  
Cutting Speed ◽  
Machining Process ◽  
Depth Of Cut ◽  
Rake Face ◽  
Orthogonal Machining ◽  
Aluminum Chips ◽  
Before And After ◽  
Materials Used ◽  
Glass Knife ◽  
Very High

Tool materials used in ultramicrotomy are glass, developed by Latta and Hartmann (1) and diamond, introduced by Fernandez-Moran (2). While diamonds produce more good sections per knife edge than glass, they are expensive; require careful mounting and handling; and are time consuming to clean before and after usage, purchase from vendors (3-6 months waiting time), and regrind. Glass offers an easily accessible, inexpensive material ($0.04 per knife) with very high compressive strength (3) that can be employed in microtomy of metals (4) as well as biological materials. When the orthogonal machining process is being studied, glass offers additional advantages. Sections of metal or plastic can be dried down on the rake face, coated with Au-Pd, and examined directly in the SEM with no additional handling (5). Figure 1 shows aluminum chips microtomed with a 75° glass knife at a cutting speed of 1 mm/sec with a depth of cut of 1000 Å lying on the rake face of the knife.

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