scholarly journals Deep High-moisture Soil pH Test Equipment and Method

2021 ◽  
Vol 261 ◽  
pp. 04003
Author(s):  
Dongxu Chen ◽  
Hua Liu ◽  
Erjian Cai ◽  
Hui Wu
Keyword(s):  
Soil Ph ◽  
Soil Analysis ◽  
Single Point ◽  
Normal Growth ◽  
High Moisture ◽  
Deep Soil ◽  
Inaccurate Measurement ◽  
High Soil ◽  
Measurement Results ◽  
Soil Hardening

Excessive use of chemical fertilizers in the soil will cause excessive residues of heavy metals, soil hardening and high soil alkalinity. A soil pH tester is generally used to test the soil pH scale to ensure the normal growth of crops. However, the tester cannot be used directly in the case of soil hardening and the soil should be moistened before measurement. In addition, existing soil pH testers can only perform single-point tests, and multiple tests are generally required in order to obtain accurate experimental data. Common deep soil pH test devices are difficult to use and have the problem of inaccurate measurement results due to excessive impurities in the soil in the process of use, resulting in errors in soil analysis which require secondary revision to improve the soil environment. To make up for the defects of existing technologies, this study designs a deep high-moisture soil pH tester, which has the advantage of high soil impurity filtering performance and addresses the problem of inaccurate measurement results due to excessive impurities in the soil.

Effect of Trifluralin and Metribuzin Combinations on Soybean Tolerance to Metribuzin

Weed Science ◽  
1977 ◽  
Vol 25 (1) ◽  
pp. 88-93 ◽  
Author(s):  
James S. Ladlie ◽  
William F. Meggitt ◽  
Donald Penner
Keyword(s):  
Glycine Max ◽  
Soil Ph ◽  
Root Development ◽  
Field Trials ◽  
Soybean Plant ◽  
Ph Values ◽  
High Soil

In field trials, soybeans [Glycine max(L.) Merr.] treated with trifluralin [α,α,α-trifluoro-2,6-dinitro-N,N-dipropyl-p-toluidine] at 0.56 and 0.84 kg/ha were protected from injury by metribuzin [4-amino-6-tert-butyl-3-(methylthio-as-triazine-5(4H)one] at 0.28 to 1.12 kg/ha. Soybean injury from metribuzin at high soil pH values was reduced by applying it in combination with trifluralin. Trifluralin also protected soybeans from injury caused by low rates of atrazine [2-chloro-4-(ethylamino)-6-(isopropylamino)-s-triazine] greenhouse studies. The trifluralin treatment reduced root development and greatly reduced14C-atrazine and14C-metribuzin uptake and content within the soybean plant.

scholarly journals Effect of soil erosion and topography on distribution of cadmium (Cd) in Sumani watershed, west Sumatra, Indonesia

2018 ◽  
Vol 229 ◽  
pp. 03001 ◽  
Author(s):  
Aflizar ◽  
Aprisal ◽  
Cornelius Idowu Alarima ◽  
Tsugiyuki Masunaga
Keyword(s):  
Soil Erosion ◽  
Soil Ph ◽  
Volcanic Ash ◽  
River Sediments ◽  
Soil Survey ◽  
Total Carbon ◽  
High Soil ◽  
West Sumatra ◽  
Material Translocation ◽  
Carbon Erosion

The purpose of this study was to characterize and present the distribution of heavy metals especially Cd on agricultural and non-agricultural lands and river sediments in relation to soil erosion and topography status in watersheds. The study was conducted for a detailed soil survey by collecting 146 soil sample based on land use, soil family and topography position and 23 river sediments sample. The Cd was extracted by 0.1 M HCl and determined by ICP. The result showed that the concentration of Cd in soil and river sediment were low in toxicity based on FAO recommendation (Cd 0.4 mg/kg) with only 4 out of 169 sampling sites contained Cd exceeding the toxicity level. Volcanic ash from Mount Talang Volcano is a natural source of Cd in Sumani watershed. Cd concentration was low in areas with high soil erosion, which indicate material translocation caused by high soil erosion that accumulates sediment in plains and rivers. Agricultural soil was found to be low in soil pH and clay accompanied by high R factor and upland topography hence the increase in Cd concentration of the soil. The study concluded that Cd abundance in soils may be influenced by soil pH, texture, total carbon, erosion factors, and topography.

Research on Flow Characteristics of Aerostatic Circular Thrust Bearing with a Cone Cavity

2011 ◽  
Vol 308-310 ◽  
pp. 189-192
Author(s):  
Long Xing Chen ◽  
Wen Qi Ma ◽  
He Chun Yu ◽  
Hai Yan Liu ◽  
Hong Wang Du
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Thrust Bearing ◽  
Single Point ◽  
Flow Characteristics ◽  
Simulation Method ◽  
Flow Passage ◽  
Testing Method ◽  
Measurement Results ◽  
Simulation And Experiment

The aerostatic circular thrust bearing was taken as a study subject. The numerical simulation method was used to calculate the flow passage. Meanwhile, the single-point testing method was used to test the pressure distribution. The simulation and experiment measurement results were compared and analyzed. The results show that: The single-point testing method is effective to capture the change of flow characteristics. The overall results of simulation and testing coincide with each other well. In the range of cone cavity, the flow pattern for the gas is turbulent flow, and the flow field should be divided into different zones for simulation.

Report on the buried soil

1987 ◽  
Vol 53 (S2) ◽  
pp. 32-32
Author(s):  
Helen C.M. Keeley
Keyword(s):  
Calcium Carbonate ◽  
Soil Ph ◽  
Pollen Analysis ◽  
Soil Analysis ◽  
High Ph ◽  
Acid Grassland ◽  
Buried Soil

Present-day soils in the Borwick area form the Carnforth Association, i.e. freely drained gravelly brown earths, some calcareous brown earths and peaty gleys and peaty soils in hollows. pH is normally 6 to 7, with some soil pH higher than 7.The buried soil beneath the cairn was a truncated stagnopodzol with a pH of 7.35. The Eag, Bf and Bs horizons were present but the lack of a topsoil and relatively high pH suggested that pollen analysis of the soil would be unproductive. Similarly, detailed soil analysis was unlikely to add to the interpretation of the site and was therefore not pursued. The development of podsolised soils on such gravels is not unusual and may indicate that the vegetation at the time the cairn was constructed was acid grassland or moorland. The soil pH would have been on the acid side at this stage, rising subsequently due to downward leaching of the calcium carbonate from the overlying limestone of the enclosure.

scholarly journals Neoplastic transformation induced by an activated lymphocyte-specific protein tyrosine kinase (pp56lck).

1988 ◽  
Vol 8 (2) ◽  
pp. 540-550 ◽  
Author(s):  
J D Marth ◽  
J A Cooper ◽  
C S King ◽  
S F Ziegler ◽  
D A Tinker ◽  
...  
Keyword(s):  
Tyrosine Kinases ◽  
Cell Transformation ◽  
Single Point ◽  
Normal Growth ◽  
Protein Tyrosine Kinases ◽  
Single Point Mutation ◽  
Tyrosine Residue ◽  
Protein Tyrosine ◽  
Carboxy Terminal

The lck proto-oncogene encodes a lymphocyte-specific member of the src family of protein tyrosine kinases. Here we demonstrate that pp56lck is phosphorylated in vivo at a carboxy-terminal tyrosine residue (Tyr-505) analogous to Tyr-527 of pp60c-src. Substitution of phenylalanine for tyrosine at this position resulted in increased phosphorylation of a second tyrosine residue (Tyr-394) and was associated with an increase in apparent kinase activity. In addition, this single point mutation unmasked the oncogenic potential of pp56lck in NIH 3T3 cell transformation assays. Viewed in the context of similar results obtained with pp60c-src, it is likely that the enzymatic activity and transforming ability of all src-family protein tyrosine kinases can be regulated by carboxy-terminal tyrosine phosphorylation. We further demonstrate that overexpression of pp56lck in the murine T-cell lymphoma LSTRA as a result of a retroviral insertion event produces a kinase protein that despite wild-type primary structure is nevertheless hypophosphorylated at Tyr-505. Thus, control of normal growth in this lymphoid cell line may have been abrogated through acquisition of a posttranslationally activated version of pp56lck.

scholarly journals Effects of water-saving pruning on the growth and water consumption of jujube (Ziziphus jujuba Mill.) in a loess hilly region with deep soil desiccation

2021 ◽  
Author(s):  
Jianpeng Ma ◽  
Xing Wang ◽  
Xining Zhao ◽  
Wenfei Zhang ◽  
Youke Wang
Keyword(s):  
Water Consumption ◽  
Normal Growth ◽  
Apple Orchard ◽  
Water Saving ◽  
Deep Soil ◽  
Soil Desiccation ◽  
Hilly Region ◽  
Ziziphus Jujuba ◽  
Use Efficiency ◽  
Loess Hilly Region

Abstract In order to study whether jujube trees can grow normally under rain-fed conditions in loess hilly areas, we planted jujube trees (Ziziphus jujuba Mill.) 4 years after felling a 23-year-old apple orchard. The growth process of the jujube trees and the variation in soil water content (SWC) were monitored for three consecutive years following planting in order to study the effects of the water-saving pruning (WSP) technique. Results showed that: (1) The soil at a depth of 0–1,000 cm had been desiccated when the area was an apple orchard. (2) Under rain-fed condition, the jujube trees with WSP technique were always able to maintain normal growth while the jujube trees with conventional pruning method had a normal growth stage of only 4 years. And the water use efficiency of the jujube trees with WSP technique was much higher than that of the jujube trees with conventional pruning. We recommend WSP in jujube orchard management, because the jujube trees with WSP could maintain normal growth in deep dried soils of the loess hilly region, as WSP can reduce the water consumption of the jujube trees and may has positive effect on soil moisture restoration.

scholarly journals ZnO Nanoparticle Improves Maize Growth, Yield and Seed Zinc under High Soil pH Condition

2018 ◽  
Vol 7 (12) ◽  
pp. 1593-1601
Author(s):  
Ramesh raddy ◽  
Mahesh Salimath ◽  
K.N. Geetha ◽  
A.G. Shankar
Keyword(s):  
Soil Ph ◽  
Growth Yield ◽  
Zno Nanoparticle ◽  
Maize Growth ◽  
High Soil

scholarly journals 235 Evaluation of Southern Pea Cultivars and Breeding Lines for Earliness, Maturity, and Yield in Multiple-year Trials in South Texas

HortScience ◽  
2000 ◽  
Vol 35 (3) ◽  
pp. 431E-431
Author(s):  
L. Brandenberger ◽  
R. Wiedenfeld ◽  
R. Mercado ◽  
J. Lopez ◽  
T.E. Morelock
Keyword(s):  
Soil Ph ◽  
Field Trials ◽  
South Texas ◽  
Breeding Lines ◽  
High Ph ◽  
Important Crop ◽  
High Soil ◽  
New Varieties ◽  
And Performance ◽  
High Yields

Southern peas for the processing market are an important crop for producers in South Texas, but little testing of new varieties or breeding lines has been carried out. Grower field trials during three different years and an on station trial provided an opportunity to evaluate >30 different pea cultivars or breeding lines. Cultivars and breeding lines were evaluated for earliness, maturity, yield, and performance in high-pH soils. Yields varied significantly each season, with Arkansas Blackeye # 1 providing consistently high yields in the three grower trials. Both Arkansas 87-435-68 and Texas Pinkeye produced significantly higher yields in the high soil pH trial at Weslaco. Yields for Arkansas 87-435-68 and Texas Pinkeye in the Weslaco trial were 1428 and 1231 lb of dry peas per acre, respectively.

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