Morphometric and Sub-Watershed Analysis of Taraka Watershed, H.D. Kote Taluk, Mysuru District, Karnataka, India using Remote Sensing and GIS Techniques

The current research work is an attempt to study of drainage area covering 429 sqkms comprising of 10 sub-watersheds they are namely Heggadadevanakote, Budanuru, Kodasige, Yedenhundi, Sunkadakatte, Nagarahole, Muruganahalli, Heggadapura, Kalhalla, Sarathihole. The research area has strong structural control shows that the 10 sub-basins named as the normal category. Different parameters of morphometric were used, Arc-Info and Arc -View GIS software was used to analysis the morphometric parameters and drainage characteristics, Sub-basin have been delineated by drainage pattern. The drainage pattern suggesting very coarse to coarse texture and the density explains the texture of drainage is related to coarse as geomorphic development their late youth stage and values suggest that Form factor, Circulatory ratio, Sub-basins are circular to elongated in shape.

New Approach for Mining Site Reclamation Using Alternative Substrate Based on Phosphate Industry By-Product and Sludge Mixture

Mining soils are generally characterized by soils having a coarse texture and low fertility, which makes revegetation a very difficult and delicate operation, especially in arid and semi-arid zones. The main objective of this work is to evaluate different substrates that can both contribute to the successful reclamation of phosphate mining soils and the valorization of phosphate by-product and sewage sludge. The study was carried out in pots under a greenhouse on Italian ryegrass (Lolium multiflorum). The experimental design is a randomized complete block with ten treatments, four repetitions from five substrates: phosphogypsum (PG), phosphate sludge (PS), sewage sludge (SS), topsoil from mining (TS) and phosphate waste rocks (PWR); this corresponds to soil after rock phosphate extraction. Nitrogen fertilization was applied to treatments after soil depletion in treatments not receiving sludge. An aerial biomass measurement and nutrient analysis were carried out for the three cuts. The results showed that a proportion of 65% of PG enriched the substrate in phosphorus by improving the crop yield. The addition of 5% of SS contributed to a significant improvement of ryegrass aerial biomass. In the absence of SS application, the addition of nitrogen is required to maintain crop growth. For large-scale application, TS can be mixed with PS, SS and PG for mine site reclamation.

How are mineral and organic phases regulating burning-induced soil water repellency? Unravelling the crucial dynamics occurring in the Alps even at moderate fire intensities.

<p>Wildfires play the role of ecosystem shapers in the majority of terrestrial biomes, altering canopy and litter cover and imposing strong modifications on soils. Organic matter (OM) content and composition, mineralogy, pH, aggregate stability and water repellency (WR) are among the main edaphic properties to be affected by heat. Various studies dealt with occurrence, extent and persistence of burning-induced soil WR, but the dynamics at the basis of its formation (and loss) are still widely unclear. In addition, the vast majority of research on this topic has been carried out in the Mediterranean, even if alpine environments are far from being untouched by fires. Our aims were therefore to provide insight into the key mechanisms regulating WR thermal alterations in a relatively understudied environment.</p><p>Our sampling design aimed at collecting soils representative of the Western Italian Alps. Charring was simulated in the lab, at increasing temperatures (up to 300° C), on a set of A soil horizons developed under pine and beech forest covers. Water drop penetration time (WDPT) was employed to test WR persistence. Soils were analyzed in terms of organic carbon (OC) and nitrogen contents, pH, texture and iron (Fe) oxides composition (Fe-DCB and Fe-pyrophosphate extracted). Fe-speciation and OM composition of some selected samples were further characterized using Fe K-edge extended X-ray absorption fine structure (EXAFS) spectroscopy and Fourier transform-infra red (FT-IR) spectroscopy, respectively.</p><p>WR was found to be extremely variable, event at room temperature. For samples exhibiting an increase in WR upon burning intensity, maximum repellency was observed at 200° C. OC abundance (%) and coarse texture were found to be the main drivers of hydrophobicity in soil. WR was drastically lost when samples were exposed to temperatures higher than 200°C. Above this threshold, pH systematically increased and OC (%) sharply decreased. The increasingly negative charge of mineral surfaces, mirrored by pH increase, seems to result in a significant C volatilization by OM desorption, eventually leading to a super-hydrophilic behavior in soil.</p><p>Fe EXAFS allowed to evaluate different thermal-dictated pathways of Fe-speciation. The formation of more crystalline Fe-forms (e.g. hematite, meghemite) was observed above 200° C. Even though a reduction in surface area should be expected when observing an increase in crystallization degree (potentially giving rise to greater WR), OM adhesion to mineral surfaces seems to be inhibited by the change induced in their charge. A reduction in the OM-bound Fe pool (pyrophosphate extracted) above 200° C could be appreciated, supporting the interpretation of oxy-hydroxides transformations and OC (%) loss.  </p><p>The current investigation has been carried out to capture an in-depth picture of wildfire impacts on alpine soils, targeting factors responsible for WR enhancement and shred. Identifying the mechanisms regulating wildfire-related WR is a key issue, as the formation of hydrophobic layers in soil highly favors its erosion. Addressing such matters is crucial to tackle the issue of ecosystems recovery, considering that climate-change-related alterations in wildfires regimes are already causing the occurrence of more frequent and disruptive fires.</p>

Pataruman Watershed Curve Number Determination Study Based on Indonesia Land Map Unit

The rainfall-runoff model is commonly used in flood discharge computation. One of the most frequently employed methods to estimate the flood discharge in the ungauged basin is NRCS-CN. This study is aimed to determine the CN value with/without soil drainage capacity from the soil information in SPT Indonesia. The location used is Pataruman watershed by calibrating the simulation discharge results with the observed discharge. Soil conditions in the Pataruman watershed show that the soil texture has a fine texture (HSG D), a slightly fine texture (HSG C), and a slightly coarse texture (HSG A). The average composite CN in the Pataruman watershed without soil drainage capacity was 85.58 while soil drainage capacity was 81.01. The results of the analysis show that with/without taking into account the soil drainage capacity in the Pataruman watershed there is no significant difference in discharge with a relation coefficient of 0.734 (without soil drainage capacity) and 0.732 (with soil drainage capacity). CN calculations with/without soil drainage capacity are recommended for small watersheds.

Water saving technology package to improve shallot productivity for smallholder farmers in eastern Indonesia

Dryland usage for shallot cultivation is very potential in West Nusa Tenggara (NTB) Province Indonesia. However, its utilization is faced with various obstacles such as soil low fertility, limited water availability, and high pest and disease attacks. Currently, farmers apply flood and furrow irrigation methods for shallot cultivation in NTB Province, which may not suitable on dryland, especially on coarse texture soils. The purpose of this study was to obtain a package of water-saving technology to increase the productivity of shallots in the dryland of NTB. There were three treatments of technology packages tested laid as Randomized Block Design: A (Trichoderma sp., bio-urine liquid fertilizer, sprinkler irrigation; B (bio-urine liquid fertilizer, furrow irrigation); and C (farmer practice), involving farmer group members from planning to evaluating for the technology package that being tested. The amount of water used was measured using a water meter. The results showed that package A had achieved the highest shallot yield at 31.6 tons ha-1, which was 14% and 45% higher compared to package B and C, respectively. Package A was also able to save water irrigation for 62.1% and 95.8% compared to package B and C, respectively. Thus, sprinkler irrigation not only can increase shallot yield but also better in saving water irrigation. Penggunaan lahan kering untuk budidaya bawang merah di Nusa Tenggara Barat sangat potensial. Namun hal tersebut terkendala oleh beberapa masalah seperti rendahnya kesuburan tanah, terbatasnya air irigasi, dan tingginya gangguan hama dan penyakit. Saat ini, petani di NTB mengairi tanaman bawang merah dengan cara direndam atau leb yang belum tentu sesuai dengan kondisi lahan kering terutama pada tanah dengan tekstur berpasir. Tujuan dari penelitian ini adalah untuk mendapatkan paket teknologi hemat air yang dapat meningkatkan hasil dan pendapatan budidaya bawang merah di lahan kering. Ada tiga perlakuan paket teknologi yang ditata dengan rancangan acak kelompok yaitu A (Trichoderma sp., pupuk organik cair bio-urine, dan irigasi curah); B (pupuk organik cair bio-urine, dan pengairan leb), dan paket C (cara petani: pengairan leb). Penelitian ini melibatkan petani mulai dari perencanaan sampai evaluasi paket teknologi yang diujikan. Hasil penelitian menunjukkan bahwa paket A menghasilkan produksi tertinggi sebesar 31,6 t ha-1, atau 14% dan 45% ebih tinggi dari paket B dan C. Paket A juga mampu menghemat air irigasi sebanyak 62,1% dan 95,8% dibandingkan dengan paket B dan C. Dengan demikian, penggunaan irigasi curah mampu meningkatkan hasil dan menghemat air irigasi.

Tropical Signalgrass Control in Seashore Paspalum

Tropical signalgrass (Urochloa subquadripara) is a mat-forming grass with relatively coarse texture. It is characterized by hairy sheaths and leaf blades plus a short fringe of hair present on the ligule. Tropical signalgrass control in Florida has been challenging for turf managers, in part, due to monosodium methanearsonate (MSMA) restrictions. Previous research indicates fall herbicide applications to be more effective than summer applications; however, fall applications typically do not allow turfgrass adequate time to fill in bare spots prior to winter. Two studies were conducted on seashore paspalum (Paspalum vaginatum) roughs at The Oaks golf course in Osprey, FL in summer 2019 comparing single and combination treatments of amicarbazone, carfentrazoneethyl, sulfentrazone, flazasulfuron, and quinclorac for control of tropical signalgrass. All treatments were applied with a non-ionicsurfactant at 0.25% v/v. In both studies a sequential application of each treatment was made 21 days after initial treatment (DAIT). Rating dates were 4 June, 25 June, 16 July, and 13 August, corresponding to 0, 21, 42, and 70 DAIT, respectively. In study one, 10 weeks after initial treatment (WAIT), amicarbazone + carfentrazone-ethyl + sulfentrazone at 0.23 + 0.0076 + 0.068 lb ai/acre (0.26 + 0.0085 + 0.076 kg ai/ha), respectively, provided best control (~60%). For study two, at 6 and 10 WAIT, tropical signalgrass control of >50% was not achieved. Overall, long-term postemergence control of tropical signalgrass with summer applications of herbicides tested was incomplete, even with multiple applications; however, amicarbazone + carfentrazone-ethyl + sulfentrazone showed potential as a control option.

Retrospective CT/MRI Texture Analysis of Rapidly Progressive Hepatocellular Carcinoma

Rapidly progressive hepatocellular carcinoma (RPHCC) is a subset of hepatocellular carcinoma that demonstrates accelerated growth, and the radiographic features of RPHCC versus non-RPHCC have not been determined. The purpose of this retrospective study was to use baseline radiologic features and texture analysis for the accurate detection of RPHCC and subsequent improvement of clinical outcomes. We conducted a qualitative visual analysis and texture analysis, which selectively extracted and enhanced imaging features of different sizes and intensity variation including mean gray-level intensity (mean), standard deviation (SD), entropy, mean of the positive pixels (MPP), skewness, and kurtosis at each spatial scaling factor (SSF) value of RPHCC and non-RPHCC tumors in a computed tomography (CT) cohort of n = 11 RPHCC and n = 11 non-RPHCC and a magnetic resonance imaging (MRI) cohort of n = 13 RPHCC and n = 10 non-RPHCC. There was a statistically significant difference across visual CT irregular margins p = 0.030 and CT texture features in SSF between RPHCC and non-RPHCC for SSF-6, coarse-texture scale, mean p = 0.023, SD p = 0.053, MPP p = 0.023. A composite score of mean SSF-6 binarized + SD SSF-6 binarized + MPP SSF-6 binarized + irregular margins was significantly different between RPHCC and non-RPHCC (p = 0.001). A composite score ≥3 identified RPHCC with a sensitivity of 81.8% and specificity of 81.8% (AUC = 0.884, p = 0.002). CT coarse-texture-scale features in combination with visually detected irregular margins were able to statistically differentiate between RPHCC and non-RPHCC. By developing an image-based, non-invasive diagnostic criterion, we created a composite score that can identify RPHCC patients at their early stages when they are still eligible for transplantation, improving the clinical course of patient care.

Radiomic texture analysis correlates with PDAC patient outcomes on SM-88.

e16776 Background: SM-88 (racemetyrosine) is a dysfunctional tyrosine derivative; previous studies demonstrated a well-tolerated profile with encouraging efficacy. Recent advances in image analysis using Quantitative Textural Analysis (QTA) have uncovered non-invasive biomarkers that correlate with molecular drivers of cancer and prognostic signatures of response in PDAC. Earlier radiomic data from subjects treated with SM-88 showed a positive correlation between circulating tumor cells and tumor texture at baseline. This study extends those findings to focus on radiomic changes associated with SM-88 doses in a Phase II dose escalation trial (NCT03512756). Methods: Retrospective evaluation of 18 subjects with >1 prior therapy, ECOG PS <2, with no restriction on size, number, or locations of mets, and had baseline (BL) and follow up (FUP) contrast enhanced CTs. Subjects received > 1 cycle of SM-88 at either 460mg (n = 8) or 920mg (n = 10) QD oral doses. CTs were analyzed by the QTA platform (TexRad, Essex, UK) for tumor texture. The largest met of each subject was selected using portal venous phase images. A region of interest was posited on the axial slice with the longest tumor diameter and features automatically generated using voxel resampling to correct for scanner variability across subjects and time points. Results were displayed as histogram frequency curves (HFCs) of pixel densities (Hounsfield Units). First order HFC analysis (mean, StDev, MPP, skewness, kurtosis) at spatial scale filters (SSF) ranging from no filter, to fine, to coarse texture (SSF:0, SSF:2, SSF:6, respectively) were reported. Results: Subjects whose largest lesions showed greater changes in tumor texture at FUP vs. BL were more likely to develop tumor progression (StDev in PD (n = 10) vs SD (n = 7) (1 N/A): -0.07 vs -0.25, p = 0.05). Greater tumor textural changes were associated with poor survival at 180 days (Skewness: Chi-Sq. = 4.81, p = 0.03; HR = 4.1 for above median □Skewssf3). There was a negative change in FUP kurtosis vs BL in the 6 subjects who developed new lesions vs the 12 who did not (mean □kurtosis = -0.67 vs +2.63, p = 0.05). Greater change in tumor texture on FUP vs BL scans was seen in the 460mg vs 920mg group (MPPLD = -0.29, MPPHD = -0.04; p = 0.05) suggesting more tumor stability (less change in texture and better outcomes) was associated with the 920mg dose. Conclusions: Tumor lesions in subjects on 920mg of SM-88 were less likely to show a change in tumor texture and were associated with better outcomes. Using radiomic QTA, less tumor texture variability from baseline may be associated with better outcomes in PDAC subjects.