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Journal articles on the topic 'Soil requirements'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Ajayi, F. I., M. A. Yessoufou, and T. E. Akinbayo. "Draught Requirements of Tillage Tines in Clay Soil under Indoor Soil Bin Conditions." Applied Research Journal of Environmental Engineering 3, no. 2 (2020): 1–12. http://dx.doi.org/10.47721/arjee20200302019.

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Large tine (Tl) and sweep tine (Tw) were the different model tillage tines used for this research. The blades were used on clay soil in a soil bin of dimension 9.0 × 0.85 × 0.5m located in the Department of Agricultural Engineering of the Federal University of Technology, Akure, Nigeria. The clay soil used for the experiment was obtained from Agricultural Engineering Step B Farm. The objective of this study was to evaluate the draught requirements of the model tillage tools and to evaluate and model the parameters of the soil profile produced under different operating conditions. It involved t

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Deveci, Huzur, Buse Önler, and Tolga Erdem. "Modeling the Effect of Soil Type Change on Irrigation Water Requirements of Sunflower and Wheat Using CROPWAT 8.0." Water 17, no. 10 (2025): 1437. https://doi.org/10.3390/w17101437.

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Water scarcity, environmental factors, and climate change significantly impact agricultural productivity, making efficient irrigation strategies essential for sustainable crop production. The aim of this study is to determine how different soil types affect the irrigation water requirements of sunflower and wheat. To achieve this aim, the total net irrigation water requirements of sunflower and wheat plants in different soil types in the TR21 Thrace Region (Tekirdağ, Edirne, Kırklareli) during the period 1971–2000 was determined by CROPWAT 8.0. The results reveal that light-textured soils lead

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3

Eponon, Eboa Christophe Ghislain, Koffi Fernand Jean-Martial Kassi, Konan Didier Kouamé, et al. "The Soil Diagnostic Method to Formulate Fertilizer Requirements for Coffee Trees in Côte d'Ivoire." Archives of Current Research International 23, no. 4 (2023): 51–59. http://dx.doi.org/10.9734/acri/2023/v23i4569.

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Coffee is a crop that exports significant amounts of minerals from the soil, particularly through crop and pruning products. Maintaining sustainable productivity requires good knowledge and rational management of factors related to soil fertility and plant nutritional status, which would limit production. The objective of this study was to diagnose the mineral requirements of coffee plants in different production regions in order to recommend nutrient quantities adapted to the characteristics of each soil type for sustainable coffee production. Chemical analysis of 156 soil samples representat

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Lasota, Jarosław, Ewa Błońska, Tomasz Wanic, and Maciej Zwydak. "The trophic requirements of selected underwood species occurring in forests." Forest Research Papers 75 (2) (June 1, 2014): 181–91. https://doi.org/10.2478/frp-2014-0017.

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The subject of this study were soil requirements of common woody shrubs, which may be part of the forest understory (<em>Sorbus aucuparia</em> L., <em>Frangula alnus</em> Mill., <em>Corylus avellana</em> L., <em>Juniperus communis</em> L., <em>Padus avium</em> Mill., <em>Euonymus europaea</em> L., <em>Sambucus nigra</em> L.). We focused on phytocenoses in the vicinity of natural forests in reserves and national parks of Polish lowlands and defined optimal types and subtypes of soil with trophic variations for each underwood species. The range of trophism for each species of shrub was determine

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A Loukanov, I., J. Uziak, and J. Michálek. "Draught requirements of enamel coated animal drawn mouldboard plough." Research in Agricultural Engineering 51, No. 2 (2012): 56–62. http://dx.doi.org/10.17221/4903-rae.

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The power requirement of tillage implements is an important design consideration particularly for animal-drawn implements where the power is limited. The paper presents the possibility of reduction in the draught requirements of animal-drawn mouldboard plough by using enamel coating on the soil-engaged components such as the mouldboard, share and the landside. Trials were conducted to compare enamel-coated Maun Series single mouldboard plough (manufactured by Zimplow Limited, Bulawayo,Zimbabwe) with similar uncoated plough, both animal-drawn, under comparable working conditions. Experiments we

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Holford, ICR, and BR Cullis. "Effects of phosphate buffer capacity on yield response curvature and fertilizer requirements of wheat in relation to soil phosphate tests." Soil Research 23, no. 3 (1985): 417. http://dx.doi.org/10.1071/sr9850417.

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Data from 39 fertilizer field experiments in north-western New South Wales were used to examine the effects of phosphate buffer capacity on yield response curvature and fertilizer requirements of wheat in relation to six soil phosphate tests (Bray1, Bray2, BSES, Truog, lactate, and bicarbonate). The soil tests were also evaluated for their accuracy in predicting yield responsiveness in a total of 48 experiments. There was a highly significant negative correlation between buffer capacity and response curvature, accounting for nearly 50% of the variance in curvature. The accuracy of the relation

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Lasota, Jarosław, Ewa Błońska, Tomasz Wanic, and Maciej Zwydak. "The trophic requirements of selected underwood species occurring in forests." Forest Research Papers 75, no. 2 (2014): 181–91. http://dx.doi.org/10.2478/frp-2014-0017.

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Abstract The subject of this study were soil requirements of common woody shrubs, which may be part of the forest understory (Sorbus aucuparia L., Frangula alnus Mill., Corylus avellana L., Juniperus communis L., Padus avium Mill., Euonymus europaea L., Sambucus nigra L.). We focused on phytocenoses in the vicinity of natural forests in reserves and national parks of Polish lowlands and defined optimal types and subtypes of soil with trophic variations for each underwood species. The range of trophism for each species of shrub was determined using specific physicochemical properties of the soi

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8

Hartz, T. K. "113 ESTIMATING SOIL. POTASSIUM SUPPLY TO MEET PROCESSING TOMATO REQUIREMENTS." HortScience 29, no. 5 (1994): 444d—444. http://dx.doi.org/10.21273/hortsci.29.5.444d.

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A 1993 survey of 50 commercial processing tomato fields in California revealed widespread potassium deficiency, as determined by tissue K levels below existing sufficiency standards and the occurrence of vine necrosis consistent with K deficiency. Soils from these fields were analyzed for exchangeable K by ammonium acetate extraction, and for K release rate by a 7 day incubation procedure (1:10 soil:. 01 M CaCl2 at 25°). Soil K release rate was more highly correlated with tissue K at midseason than was exchangeable K. These soils were further examined for K fixation capacity. Three g soil was

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9

S.O., Abich, Gitau A.N., and Nyaanga D. M. "MODELING SUBSOILING DRAFT REQUIREMENTS USING DIMENSIONAL ANALYSIS." Journal of Engineering in Agriculture and the Environment 8, no. 2 (2022): 14. http://dx.doi.org/10.37017/jeae.v8i2.89.

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Increased conventional tillage of farming operations has increased soil compaction. The objective of this study was to model the effects of soil compaction on draft force of sub soiling silt loam soils using dimensional analysis. A factorial experiment in a Completely Randomized Block design was used in the study. Experiments were conducted on 18 plots to investigate the effect of five-wheel pass (1, 2, 3, 4. 5) and control treatments on soil mechanico-physical properties at 0 - 20, 20 - 20 and 30 - 40 cm depths with three replications. The data obtained from the experiments were subjected to

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10

Goundar, M. S., R. J. Morrison, and C. Togamana. "Phosphorus requirements of some selected soil types in the Fiji sugarcane belt." South Pacific Journal of Natural and Applied Sciences 32, no. 1 (2014): 1. http://dx.doi.org/10.1071/sp14001.

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The availability of phosphorus (P) in soil is perceived to be one of the limiting factors to sustainable sugarcane production in Fiji. The main objective of this research was to ascertain the amount of bioavailable phosphorus in some Fiji sugarcane growing area soils; this will be valuable in improving the determination of the required amount of inorganic fertilizer to be applied to the soil. In this study, twelve different soils were selected from the sugarcane belt of Fiji and phosphorus buffer index (PBI) and phosphorus isotherm experiments were performed. Soil physical and chemical paramet

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11

MARKIN, V. N. "PRECISE LAND RECLAMATION AS A MEANS OF PRESERVING SOIL FERTILITY." Prirodoobustrojstvo, no. 4 (2021): 6–14. http://dx.doi.org/10.26897/1997-6011-2021-4-6-14.

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The purpose of the work is to assess the probabilities of the need for irrigation, taking into account the requirements of plants and soils for different agro hydrological areas of the Samara region, in which fi ve agro hydrological areas are allocated. The issues of substantiation of irrigation taking into account both the requirements of plants and soils in the conditions of heterogeneity of the distribution of moisture reserves in the soil at the macro level (in agro hydrological areas) are considered. This allows you to choose the most favorable conditions for growing plants and preserving

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12

Mascianica, Martin P., Robin R. Bellinder, Boyett Graves, Ronald D. Morse, and Henry Talleyrand. "Forecasting of N Fertilizer Requirements for Sweet Potatoes." Journal of the American Society for Horticultural Science 110, no. 3 (1985): 358–61. http://dx.doi.org/10.21273/jashs.110.3.358.

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Abstract Nitrogen treatments (0–134 kg N/ha) were applied on a sandy loam over 11 growing seasons to establish critical soil and tissue N levels, and to evaluate the effects of seasonal precipitation on annual variability in response of ‘Painter’ and ‘Centennial’ sweet potatoes [Ipomoea batatas (L.) Lam.] to applied N. Critical concentrations of soil NO3-N at 29 days after transplanting (DAT) and laminal N at 72 DAT were determined to be 37 μg N/g soil and 5% (dry weight), respectively. Correlation between soil NO3-N at 29 DAT and leaf N at 72 DAT was highly significant. Multiple regression an

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13

Iticha, Birhanu, Muhammad Kamran, Rui Yan, et al. "The Role of Digital Soil Information in Assisting Precision Soil Management." Sustainability 14, no. 18 (2022): 11710. http://dx.doi.org/10.3390/su141811710.

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Soil information is the basis for the site-specific management of soils. The study aimed to digitize soil information and classify it into soil mapping units (SMUs) using geostatistics. The study area was grouped into 12 SMUs, or management zones. The pH of the soils ranged from 7.3 in SMU2 to 8.6 in SMU5. Most SMUs exhibited low total nitrogen (TN) that could be attributed to very low soil organic carbon (SOC) in the soils. Available phosphorus (AvP) was very low in all the mapping units. The exchangeable K varied between 0.12 cmol(+) kg−1 (SMU7) and 0.95 cmol(+) kg−1 (SMU10). SMU12 was ident

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14

Lampert, C. "Selected requirements on a sustainable nutrient management." Water Science and Technology 48, no. 1 (2003): 147–54. http://dx.doi.org/10.2166/wst.2003.0039.

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Nutrients are a limited resource and call for management. A sustainable nutrient management strategy reintegrates nutrients in the environment without accumulating harmful substances above an acceptable level. In this study a methodology to assess the environmental compatibility was developed. For this assessment both the (i) enrichment of pollutants in the soils and (ii) the area specific nutrient demand of the crops were taken into account. The method considers, that products applied on soils also contain stable substances, and as a consequence the accumulation of pollutants diminishes. Addi

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15

Heckman, J. R., G. C. Pavlis, and W. L. Anastasia. "Lime Requirement for New Jersey Blueberry-producing Soils." HortTechnology 12, no. 2 (2002): 220–22. http://dx.doi.org/10.21273/horttech.12.2.220.

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In New Jersey, the major soil series (Sassafras, Pocomoke, Berryland, Atsion, and Downer) used for blueberry (Vaccinium corymbosum L.) production often have soil pH levels much lower than the soil pH range of 4.0 to 5.2 that is considered satisfactory for blueberry. The lime requirements for these soils to achieve a target soil pH of 4.8 has not been established. Soils with current soil pH levels in the range of 3.3 to 3.9 were collected from eight New Jersey sites used for blueberry production. The soils were treated with various application rates of calcium carbonate (CaCO3) and incubated in

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16

Shahid, Maqsood Gill, Rafique Ejaz, Sarwar Sair, and Mahmood-ul-Hassan Muhammad. "Boron requirement of chickpea (Cicer arietinum L.) cultivars to model based applied boron fertilizer on rainfed calcareous soils | JBES Journal." Journal of Biodiversity and Environmental Sciences | JBES 16, no. 3 (2021): 1–11. https://doi.org/10.5281/zenodo.5720309.

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Determining boron requirement through sorption isotherms is considered more accurate than conventional soil testing. Boron requirements of chickpea leaves and seeds were assessed from yield response curves based on the model applied by boron fertilizer under field conditions. Boron sorption isotherms were constructed by using Talagang (Fluventic Camborthid) and Balkassar (Typic Haplustalf) soil series at Murat and Tatral, Punjab Province, Pakistan, varying in their calcium carbonate and clay contents. Adsorption isotherms were constructed by equilibrating 3g soil with 30ml of 0.01M calcium chl

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17

Holford, ICR, JM Morgan, J. Bradley, and BR Cullis. "Yield responsiveness and response curvature as essential criteria for the evaluation and calibration of soil phosphate tests for wheat." Soil Research 23, no. 2 (1985): 167. http://dx.doi.org/10.1071/sr9850167.

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In a study using data from 57 wheat field experiments on the central-western slopes of New South Wales, eight soil phosphate tests (Bray,, Bray,, alkaline fluoride, Mehlich, Truog, lactate, Olsen and Colwell) were evaluated and calibrated in terms of responsiveness (�) and response curvature (C) parameters derived from the Mitscherlich equation. The results showed that, regardless of how well correlated a soil test is with yield responsiveness, it cannot give a satisfactory estimate of fertilizer requirement unless yield response curvature is also taken into account. The tendency of soil test

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18

Omran, Hassan Ali, Ibtisam Raheem Kareem, and Riyam Sahib Hassan. "EVALUATION THE OPERATION OF A DRIP IRRIGATION SYSTEM IN DIFFERENT TYPES OF SOIL." Kufa Journal of Engineering 7, no. 2 (2016): 104–21. http://dx.doi.org/10.30572/2018/kje/721208.

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Drip Irrigation Method is the best method that has been used in the world among the other irrigation methods because of its good and high uniformity. This method distributes water to the field using a pipe network and transforms it to the plant by emitters. In spite of the advantages of drip irrigation method, the system has many problems, such as the impact of soil type, silt and discharges distribution. To achieve the goals of using a drip irrigation system, it must be designed and operated properly so that rates and location of delivery of water to the root zone is suitable for crop require

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19

Kara, Tekin, and Lyman S. Willardson . "Leaching Requirements to Prevent Soil Salinization." Journal of Applied Sciences 6, no. 7 (2006): 1481–89. http://dx.doi.org/10.3923/jas.2006.1481.1489.

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20

Hochmuth, George, Jeff Brecht, and Mark Bassett. "N and K Requirements of Carrot on Sandy Soils in Florida." HortScience 32, no. 3 (1997): 523C—523. http://dx.doi.org/10.21273/hortsci.32.3.523c.

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Carrot production in Florida has been centered in two major organic-soil vegetable production areas. These areas are the Everglades Agricultural Area near Belle Glade, in southern Florida, and the Zellwood vegetable area in central Florida. The state of Florida is currently in the process of purchasing most of the organic soils used for vegetable production near Zellwood, leading to a movement of vegetable production to the surrounding sandy soil or to other vegetable production regions in the state. The move to sandy soils has lead to questions by growers about fertilization of vegetables suc

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Aitken, RL, PW Moody, and PG Mckinley. "Lime requirement of acidic Queensland soils.II. Comparison of laboratory methods for predicting lime requirement." Soil Research 28, no. 5 (1990): 703. http://dx.doi.org/10.1071/sr9900703.

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A number of laboratory procedures for predicting lime requirement were evaluated by using 40 acidic surface soils from eastern Queensland. The methods were compared on the basis of their ability to predict the lime requirement to pHw values of 5.5 and 6.5 obtained from soil-CaCO3-moist incubations. The laboratory methods evaluated included 1M KC1 extractable Al, equilibration of soil : water suspensions with varying amounts of added Ca(OH)2, the Shoemaker, McLean and Pratt (SMP) single-buffer method, the SMP double-buffer method, the Yuan double-buffer method and the Mehlich single-buffer meth

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Jänsch, S., M. J. Amorim, and J. Römbke. "Identification of the ecological requirements of important terrestrial ecotoxicological test species." Environmental Reviews 13, no. 2 (2005): 51–83. http://dx.doi.org/10.1139/a05-007.

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For about 20 years, standardized soil ecotoxicological tests have relied on the use of an artificial soil substrate (e.g., Organisation for Economic Co-operation and Development; OECD). For both the extrapolation of data obtained in the laboratory to the field situation, as well as the biological assessment of contaminated sites, this approach alone is not sufficient anymore. For this reason a literature review has been performed to investigate the ecological requirements of important terrestrial ecotoxicological test species. The invertebrate species included were Eisenia fetida, E. andrei (e

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Amaludin, Adriana Erica, Hidayati Asrah, and Habib M. Mohamad. "A Review of Advances in Peat Soil Stabilisation Technology: Exploring the Potential of Palm Oil Fuel Ash Geopolymer as a Soil Stabiliser Material." Civil Engineering Journal 9, no. 8 (2023): 2085–104. http://dx.doi.org/10.28991/cej-2023-09-08-017.

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This study aims to highlight the latest developments in the field of peat soil stabilisation technology via chemical stabilisation. The review examines the use of traditional stabilisers such as OPC and various non-traditional stabiliser materials, i.e., Palm Oil Fuel Ash (POFA)-OPC blends, chemical solutions, and geopolymer materials, to enhance the Unconfined Compressive Strength (UCS) characteristics of peat soils based on the ASTM D 4609 requirements. OPC, POFA-OPC blends, and alkaline solutions mostly produced stabilised soil samples that fell short of the ASTM requirements. Existing stud

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Edmeades, D. C., and R. M. Mcbride. "A critique: "Potassium requirements of pasture on Pumice soil" by Morton et al." Journal of New Zealand Grasslands 77 (January 1, 2015): 287–90. http://dx.doi.org/10.33584/jnzg.2015.77.471.

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Morton et al. (2014) presented the results from two rates of potassium (K) pasture trials conducted on Pumice soils which commenced in spring 2009 and ran for 3 years. They reached a number of conclusions with respect to the management of potassium requirements on such soils, based on the soil Quick Test K (QTK) samples (0-75 mm) collected in spring and suggested that the results from these two sites were unique. While noting that soil samples were collected in the autumn, they did not include these data in their anaylsis and discussion of the results. This communication discusses the implicat

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Onu, Chika, C. I. O. Kamalu, J. C. Obijaku, M. S. Nwakaudu, and E. E. Anyanwu. "OPTIMIZATION OF BIOSTIMULANTS REQUIREMENTS FOR ENHANCED BIOREMEDIATION OF CRUDE OIL SLUDGE POLLUTED SOILS." International Journal of Engineering Applied Sciences and Technology 7, no. 11 (2023): 1–17. http://dx.doi.org/10.33564/ijeast.2023.v07i11.001.

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The study was aimed at investigating the optimal requirement of biostimulants in the bioremediation of crude oil sludge polluted soils. The contaminated environment was simulatedwith 1.0kg crude oil sludge on 2.0kg soil and uniformly homogenized. The polluted soils were then simulated with NPK, Cowdung and Moringaleaf powder based on total biostimulant to soil ratio of 0:1 to 0.75:1. These biostimulants were applied individually and in varying combinations to the polluted soils in three distinct segments (1, 2, 3) corresponding to the total biostimulant to soil ratios 0.25:1, 0.50:1 and 0.75:1

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Moore, Demie, Stanley Kostka, Thomas Boerth, et al. "The effect of soil surfactants on soil hydrological behavior, the plant growth environment, irrigation efficiency and water conservation." Journal of Hydrology and Hydromechanics 58, no. 3 (2010): 142–48. http://dx.doi.org/10.2478/v10098-010-0013-1.

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The effect of soil surfactants on soil hydrological behavior, the plant growth environment, irrigation efficiency and water conservationSoil water repellency causes at least temporal changes in the hydrological properties of a soil which result in, among other things, suboptimal growing conditions and increased irrigation requirements. Water repellency in soil is more widespread than previously thought and has been identified in many soil types under a wide array of climatic conditions worldwide. Consequences of soil water repellency include loss of wettability, increased runoff and preferenti

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Elephant, D. E., N. Miles, and P. Muchaonyerwa. "Accounting for potassium reserves and fixation in developing sugarcane fertiliser requirements." Soil Research 57, no. 1 (2019): 66. http://dx.doi.org/10.1071/sr17300.

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Knowledge gaps exist in the literature regarding inclusion of reserve-potassium (K) and K fixation when formulating K fertiliser requirements for sugarcane. This study investigated the levels of reserve-K and K fixation in the soils of the South African sugar industry, as well as their potential impacts on K requirements for crop growth. The investigation involved 113 topsoil (0–20cm) samples, which included Acrisols, Arenosols, Ferralsols, Fluvisols, Leptosols, Luvisols, Nitisols, Plinthisols, and Vertisols. The release of K from the non-exchangeable reserves was measured using 1.0M boiling H

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Sladkova, Yuliya N., V. E. Kriyt, and E. A. Badaeva. "ON MAJOR PROBLEMS ARISING IN THE PROCESS OF CARRYING OUT SANITARY-EPIDEMIOLOGICAL EXPERT EXAMINATION OF LABORATORY TEST FINDINGS OF SOILS IN RESIDENTIAL AREA." Hygiene and sanitation 97, no. 12 (2018): 1146–51. http://dx.doi.org/10.18821/0016-9900-2018-97-12-1146-1151.

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Nowadays natural type soils are actually absent in urban and rural populated areas, and existing so-called “urban soils” are characterized by different degrees of technogenic and anthropogenic contamination which appears to be impossible to avoid. Such soils represent compound natural-and-anthropogenic objects which are a source of the secondary pollution of subsoil and surface waters, atmospheric air, and directly affect human beings. It results in the necessity of keeping soil quality at a proper level satisfying the requirements of № 52-FZ: Federal Law of 30.03.1999, entitled “On Sanitary a

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Selles, F., R. P. Zentner, D. W. L. Read, and C. A. Campbell. "Prediction of fertilizer requirements for spring wheat grown on stubble in southwestern Saskatchewan." Canadian Journal of Soil Science 72, no. 3 (1992): 229–41. http://dx.doi.org/10.4141/cjss92-022.

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Results of fertilizer trials conducted throughout southwestern Saskatchewan were used to develop a production function relating grain yield increases of stubble-seeded spring wheat (Triticum aestivum L.) to available water, soil NO3-N content to 60 cm depth, soil PO4-P content to 15 cm depth, and fertilizer N and P applications. The trials were carried out from 1967 to 1971 and from 1978 to 1983 on mid-textured Brown Chernozemic soils. The model accounted for 67% of the variability in yield increases, and identified water availability as the single most limiting production factor, which by its

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Brennan, R. F., and M. D. A. Bolland. "Soil and tissue tests to predict the sulfur requirements of canola in south-western Australia." Australian Journal of Experimental Agriculture 46, no. 8 (2006): 1061. http://dx.doi.org/10.1071/ea04206.

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The sulfur (S) requirements of canola (Brassica napus L.) grown in rotation with spring wheat (Triticum aestivum L.) and lupin (Lupinus angustifolius L.) in south-western Australia are not known. This study, involving 59 experiments, was conducted from 1993 to 2003 to determine soil and tissue test values for canola grain production below which S deficiency is likely. Extraction of S from soil using 0.25 mol KCl/L at 40°C (KCl-40 procedure) for the top 10 cm of soil is the standard soil test for S in the region. We measured KCl-40 values for soil samples collected at soil depths of 0–10, 10–20

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Eponon, Eboa Christophe Ghislain, Konan Didier Kouamé, Didier Snoeck, et al. "Mapping Coffee Tree Fertilizer Requirements in Côte d’Ivoire." Asian Journal of Soil Science and Plant Nutrition 9, no. 1 (2023): 34–44. http://dx.doi.org/10.9734/ajsspn/2023/v9i1170.

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Coffee production in Côte d'Ivoire has been declining sharply for more than twenty years due to degradation in soil fertility status. The objective of this study was to map the mineral requirements of coffee trees in different production regions and to recommend immediate and long-term intervention strategies for soil management. In this study, the diagnosis of the chemical needs of 156 soil samples from major coffee production areas was used. We used a soil diagnostic model specific to coffee fertilization combined with geographic information systems (GIS). The combination of fertilizer formu

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Radwan, Samir S., and Awatif S. Al-Muteirie. "Vitamin requirements of hydrocarbon-utilizing soil bacteria." Microbiological Research 155, no. 4 (2001): 301–7. http://dx.doi.org/10.1016/s0944-5013(01)80008-2.

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Bone, James, Martin Head, Declan Barraclough, et al. "Soil quality assessment under emerging regulatory requirements." Environment International 36, no. 6 (2010): 609–22. http://dx.doi.org/10.1016/j.envint.2010.04.010.

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Miller, Hugh G., and John D. Miller. "Nutritional requirements of Sitka spruce." Proceedings of the Royal Society of Edinburgh. Section B. Biological Sciences 93, no. 1-2 (1987): 75–83. http://dx.doi.org/10.1017/s0269727000006291.

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SynopsisExperiments have shown that Sitka spruce on poor soils requires relatively frequent applications of fertiliser, phosphorus being most commonly required, other deficiencies in decreasing frequency being potassium, nitrogen and, very rarely, copper. Recent evidence suggests that growth responses to fertilisers are commonest while stands are young and the green canopy is being established. Spruce has a heavy crown and in consequence nutrient demands are high prior to canopy closure. Thereafter, the annual production of foliage by spruce is no greater than that of other species of comparab

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Shalsabillah, Hanan, Khairul Amri, and Gusta Gunawan. "ANALISIS KEBUTUHAN AIR IRIGASI MENGGUNAKAN METODE CROPWAT VERSION 8.0." Inersia, Jurnal Teknik Sipil 10, no. 2 (2019): 61–68. http://dx.doi.org/10.33369/ijts.10.2.61-68.

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The Irrigation Area of Air Nipis is located in Regency of South Bengkulu at Bengkulu Province with irrigation area 3.116 Ha. Planning and management of irrigation systems is one of the important steps to determine the irrigation water requirement as a whole. The purpose of this research is aim to analyze the water requirement to get value prediction of minimum and maximum irrigation water requirement in irrigation area of Air Nipis using the CROPWAT Version 8.0 method. Irrigation water requirements obtained from CROPWAT Version 8.0 are based on climate data, soil data and plants.The parameters

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Kisinyo, P. O., C. O. Othieno, S. O. Gudu, et al. "Phosphorus Sorption and Lime Requirements of Maize Growing Acid Soils of Kenya." Sustainable Agriculture Research 2, no. 2 (2013): 116. http://dx.doi.org/10.5539/sar.v2n2p116.

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<p>In Kenya, maize (<em>Zea mays</em> L.) is mainly grown on acid soils in high rainfall areas. These soils are known for low available phosphorus (P), partly due to its sorption by aluminium (Al) and iron oxides. The study determined soil P sorption, lime requirements and the effects of lime on soil pH, Al levels and available P on the main maize growing acids soils in the highlands east and west of Rift Valley (RV), Kenya. Burnt lime containing 21% calcium oxide was used. The soils were strongly to extremely acid (pH 4.85-4.07), had high exchangeable Al<sup>3+</sup

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Kobayashi, Kent D., H. C. Bittenbender, and N. V. Hue. "Farmer's Bookshelf Information System for Predicting Phosphorus Requirements of Some Hawii Soils." HortScience 30, no. 4 (1995): 903E—903. http://dx.doi.org/10.21273/hortsci.30.4.903e.

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Most soils of Hawaii contain high amounts of iron- and aluminum oxides or amorphous alumino silicate clays, which react strongly with P making it virtually unavailable for plant uptake. Acceptable crop production is not possible unless adequate P fertilizers are applied. Growers need to know if a soil needs P and if so how much. The Farmer's Bookshelf hypermedia information system, which runs under the software HyperCard, can quickly provide these answers. A screen is displayed in which the soil series and the crop to be grown are specified through pull-down menus. The user then enters the Tru

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Brennan, R. F., and M. D. A. Bolland. "Soil and tissue tests to predict the potassium requirements of canola in south-western Australia." Australian Journal of Experimental Agriculture 46, no. 5 (2006): 675. http://dx.doi.org/10.1071/ea04218.

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The predominantly sandy soils of south-western Australia have become potassium (K) deficient for spring wheat (Triticum aestivum L.) production due to the removal of K from soil in grain and hay. The K requirements of canola (rape, Brassica napus L.) grown in rotation with wheat on these soils are not known and were determined in the study reported here. Seed (grain) yield increases (responses) of canola to applications of fertiliser K occurred at sites where Colwell soil test K values (top 10 cm of soil) were <60 mg/kg soil. Grain yield responses to applied K occurred when concentrations o

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Tremblay, G. J., J. Boisvert, G. É. Fréchette, M. Saulnier, R. Alexandre, and A. Vanasse. "Évaluation à moyen terme des besoins en engrais minéraux (N, P, K) d'une rotation en grandes cultures sur sol argileux." Canadian Journal of Soil Science 91, no. 4 (2011): 637–46. http://dx.doi.org/10.4141/cjss10013.

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Tremblay, G. J., Boisvert, J., Fréchette, G. É., Saulnier, M., Alexandre, R. and Vanasse, A. 2011. Mid term evaluation of mineral fertilizer requirements (N, P, K) of a field crop rotation on a clay soil. Can. J. Soil Sci. 91: 637–646. In Quebec, the recommended fertilizer requirements have been lowered since 1994. A study was undertaken from 1998 to 2005 in a 4-yr rotation of wheat (Triticum aestivum L.), soybean [Glycine max (L.) Merr.] and grain corn (Zea mays L.) to verify the mid-term mineral fertilizer requirements (N, P, K) for these field crops. Four levels of nitrogen (N) and three le

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Muchow, R. C., and B. A. Keating. "Assessing irrigation requirements in the Ord Sugar Industry using a simulation modelling approach." Australian Journal of Experimental Agriculture 38, no. 4 (1998): 345. http://dx.doi.org/10.1071/ea98023.

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Summary. Sustainable irrigation guidelines that maximise profitability and minimise water losses and accession to the watertable are required for the new Ord Sugar Industry. In addition, knowledge on crop water requirements is needed to guide water allocation and costing policies for the expanding Ord Irrigation Area where sugarcane is likely to be a dominant crop. Field data indicating water requirements for sugar in the Ord Irrigation Area are few and this paper deploys a modelling approach to extrapolate from knowledge of water requirements in other parts of the world. The approach links lo

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Handreck, Kevin A. "Phosphorus requirements of Australian native plants." Soil Research 35, no. 2 (1997): 241. http://dx.doi.org/10.1071/s96060.

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The phosphorus (P) requirements of Australian plants are reviewed. Many Australian plants have highly developed abilities for acquiring and conservatively using P. This is seen as an evolutionary response to the combined environmental pressures of fire, soil P levels that are in the lower part of the range for world soils, and low and eratic rainfall. In natural Australian ecosystems, more than 50% of the P in the A horizon is in organic combination. Organic matter is the main source for the growth of perennial plants, so the only successful assessments of ‘available’ P measure labile organic

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Aikins, Kojo Atta, James B. Barr, Mustafa Ucgul, Troy A. Jensen, Diogenes L. Antille, and Jack M. A. Desbiolles. "No-tillage furrow opener performance: a review of tool geometry, settings and interactions with soil and crop residue." Soil Research 58, no. 7 (2020): 603. http://dx.doi.org/10.1071/sr19153.

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The primary features of an effective and efficient furrow opener include controlled soil disturbance and low draught and vertical force requirements. When integrated in a no-tillage seeding system, furrow openers should also have the ability to assist, and not hinder, the functions of seeding system components – such as maintaining adequate surface residue distribution, accurate and uniform placement of seeds and fertiliser, and regular inter-plant spacing. This review highlights how these goals are affected by opener type, geometry and settings, and soil and residue conditions. Typically, tin

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Kilmartin, Meaghan, and Chandra A. Madramootoo. "Simulating Irrigation Requirements for Vegetable Crops in a Humid Region Considering a Changing Climate." Journal of Natural Resources and Agricultural Ecosystems 3, no. 1 (2025): 1–16. https://doi.org/10.13031/jnrae.16048.

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Highlights Water deficiency of 50% did not reduce yields. Potato needs a minimum of 247 mm of water by the 2080s. Irrigation requirements of squash are 124 mm for 2080s. Abstract. This study assessed the supplemental irrigation needs in a humid vegetable producing region of Quebec using the AquaCrop model. Three irrigation treatments were investigated, comprising a maximum allowable depletion (MAD) of 20%, 35%, and 50% of plant-available water (AW) for potato and squash cultivated on sandy soils. The AquaCrop models were calibrated to field measurements of soil moisture in 2022. Potato and squ

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YASHIN, V. M., and I. V. GLAZUNOVA. "Substantiation of plant requirements for the regulation of the water regime of soils and its control." Prirodoobustrojstvo, no. 5 (2022): 15–21. http://dx.doi.org/10.26897/1997-6011-2022-5-15-21.

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The purpose of the study is to analyze models of plant requirements for the regulation of the water regime of soils to substantiate the range of optimal humidity and its control based on automation and digitalization in accordance with the algorithm for controlling the moisture regime of reclaimed soils. The substantiation of the requirements of plants to the regulation of the water regime of soils and its control is presented. The analysis of models of dependencies of agricultural productivity on the formation of the water regime of the soil to substantiate reclamation (irrigation) is carried

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Usmanov, Rustam, Ivan Mrdak, Nikolay Vatin, and Vera Murgul. "Reinforced Soil Beds on Weak Soils." Applied Mechanics and Materials 633-634 (September 2014): 932–35. http://dx.doi.org/10.4028/www.scientific.net/amm.633-634.932.

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Changing a layer of weak soil in deformed foundation with a compacted soil bed consisted of various strong materials (sand, gravel, pebble-gravel, production waste materials). Existing calculation methods and techniques to build compacted soil beds based on weak highly compressive soils do not meet up-to-date requirements. Calculation methods used the dimensions of compacted beds quite often appear to be overestimated, and this results in increase in costs and working hours needed to build artificial foundation. The paper presents the possibility of using reinforced soil beds as an efficient m

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Gou, Jian Feng, Zheng Zhong Zeng, Hao Lei Guo, Hao Wang, Xiao Li Wang, and Zhong Ren Nan. "A Study on the Impermeability of Composite Clay of Sanitary Landfill in Loess Area." Applied Mechanics and Materials 281 (January 2013): 607–14. http://dx.doi.org/10.4028/www.scientific.net/amm.281.607.

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Through the compaction and permeability tests on loess, either natural or compacted loess can meet the requirement of the Landfill Pollution Control Standards about impermeable clay. While the compaction weathered red soil layer of the tertiary, widely distributing under the loess, whose permeability coefficient is less than 1×10-7cm/s. In this study we mixed loess with weathered red soil to obtain a new kind of composite soil, and drew a conclusion that the composite soil can meet the requirements of Chinese national standards. When the clay content of composite soil reached 21%, the permeabi

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Aboelsoud, Hesham M., Mohamed A. E. AbdelRahman, Ahmed M. S. Kheir, et al. "Quantitative Estimation of Saline-Soil Amelioration Using Remote-Sensing Indices in Arid Land for Better Management." Land 11, no. 7 (2022): 1041. http://dx.doi.org/10.3390/land11071041.

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Soil salinity and sodicity are significant issues worldwide. In particular, they represent the most dominant types of degraded lands, especially in arid and semi-arid regions with minimal rainfall. Furthermore, in these areas, human activities mainly contribute to increasing the degree of soil salinity, especially in dry areas. This study developed a model for mapping soil salinity and sodicity using remote sensing and geographic information systems (GIS). It also provided salinity management techniques (leaching and gypsum requirements) to ameliorate soil and improve crop productivity. The mo

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Head, Josephine S., Martha E. Crockatt, Zahra Didarali, Mary-Jane Woodward, and Bridget A. Emmett. "The Role of Citizen Science in Meeting SDG Targets around Soil Health." Sustainability 12, no. 24 (2020): 10254. http://dx.doi.org/10.3390/su122410254.

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Healthy soils are vital for sustainable development, yet consistent soil monitoring is scarce, and soils are poorly represented in United Nations Sustainable Development Goals targets and indicators. There is a clear need for specific ambitions on soil health, accompanying metrics, and cost-effective monitoring methodologies. In this paper, we review citizen science methods and platforms which could compliment structured soil monitoring programmes and contribute to filling this knowledge gap. We focussed on soil structure, organic carbon, biodiversity, nutrients, and vegetation cover. Each met

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Ameyu, Tolossa, Diriba Megersa, and Gizaw Tesfaye. "Evaluation and Validation of Simple and Quick Methods of Lime Rate Determination under Acid Soil-Affected Areas of West Shewa Zone, Ethiopia." Middle East Research Journal of Agriculture and Food Science 4, no. 01 (2024): 34–41. http://dx.doi.org/10.36348/merjafs.2024.v04i01.005.

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Liming acid soils is one of the available intervention options to amend soil acidity and increase crop production and productivity. The selection of a lime requirement determination easy and cheap method that is suitable to the soil conditions in a particular area is a pressing issue. Three lime requirement (LR) estimation methods i.e. (Exchangeable acidity, laboratory pH, and portable pH/Artikilee 3000) methods with one control treatment were tested in acid soils of the dhumuga learning watershed. A field study was conducted to verify the lime requirement (LR) by using portable pH methods and

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Sandral, Graeme A., Andrew Price, Shane M. Hildebrand, et al. "Field benchmarking of the critical external phosphorus requirements of pasture legumes for southern Australia." Crop and Pasture Science 70, no. 12 (2019): 1080. http://dx.doi.org/10.1071/cp19014.

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In recent decades several pasture legumes have been available in southern Australia as potential alternatives to the most widely used annual pasture legume Trifolium subterraneum. Little is known about their soil phosphorus (P) requirements, but controlled environment experiments indicate that at least some may differ in their P fertiliser requirements. In this study, pasture legume varieties, including T. subterraneum as the reference species, were grown at up to four sites in any one year over a 3-year period (in total, seven site × year experiments) to measure herbage growth responses in sp

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