13 research outputs found

    The system of soil protection and general balance of main nutrient elements in perennial plantations of semi-desert natural soil zone of Armenia

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    Received: March 27th, 2022 ; Accepted: June 3rd, 2022 ; Published: July 5th, 2022 ; Correspondence: [email protected] aim of the research is to study the biological removal of the main nutrient elements from the most common technical grape varieties, as well as from apricot and peach plantations in the farms, situated on semi-desert natural soils of Armenia, to identify the extent of their input and losses due to natural factors and to calculate the balance associated with the soil conservation system in the absence of comprehensive fertilization. In the inter-row spaces of all fruit plantations and even vineyards of the republic, grass cover of productive significance has been established (4.5–6.5 t ha-1 yield of air-dry grass), through which the removal of nutrient elements is 2–3 times higher than the biological removal through trees and vines. The research was conducted in 2015–2020, in the grape, apricot and peach plantations of the semi-desert natural zone of Armenia (Armavir region), where the irrigation norm is 5,000 m3 ha-1 , and the atmospheric precipitation is 256 mm, through which 40 kg ha-1 N, 2 kg ha-1 P2O5, and 44 kg ha-1 K2O enter the soil. The losses due to erosion and washing away are N - 12 kg ha-1 , P2O5 - 7 kg ha-1 , K2O - 75 kg ha-1 . The balance of nutrient elements in all plantations is negative, nitrogen in plantations with industrial grass cover is 154, P2O5 - 52, K2O - 311, and in the system of black fallow - 15, 16 and 85 kg ha-1 , respectively. The negative balance of nitrogen in apricot and peach plantations is 121, P2O5 - 44, K2O - 296 kg ha-1

    Production removal of the main nutrient elements from winter wheat and barley crops in the conditions of the Ararat Valley of Armenia

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    Received: February 1st, 2022 ; Accepted: February 19th, 2023 ; Published: February 20th, 2023 ; Correspondence: [email protected] aim of the research is to identify the extent of production removal of the main nutrient elements in the irrigated grain-growing lands of Armenia, to optimize the norms of organo-mineral fertilizers, to stabilize the yield of plants and prevent dehumification. The field experiments were carried out in the conditions of the Ararat Valley on winter wheat and barley in 2020–2022. The production removal of nitrogen by 5–7 t ha-1 grain of winter wheat and 9.6–13.3 t ha-1 straw varies between 155–247, P2O5: 60–88, K2O: 134–197 kg ha-1 , and the amounts removed by barley grain 4.5–6.5 t ha-1 and straw 6.9–9.7t ha-1 were 122–194, 49–77 and 106–159 kg ha-1 , respectively. The amounts of nitrogen and potassium production removal from plant crops are about 2 times higher than the doses of applied fertilizers, and the amount of phosphorus is almost balanced by these doses

    Track D Social Science, Human Rights and Political Science

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    Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/138414/1/jia218442.pd

    Transverse momentum spectra of charged particles in proton-proton collisions at s=900\sqrt{s} = 900 GeV with ALICE at the LHC

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    The inclusive charged particle transverse momentum distribution is measured in proton-proton collisions at s=900\sqrt{s} = 900 GeV at the LHC using the ALICE detector. The measurement is performed in the central pseudorapidity region (η<0.8)(|\eta|<0.8) over the transverse momentum range 0.15<pT<100.15<p_{\rm T}<10 GeV/cc. The correlation between transverse momentum and particle multiplicity is also studied. Results are presented for inelastic (INEL) and non-single-diffractive (NSD) events. The average transverse momentum for η<0.8|\eta|<0.8 is <pT>INEL=0.483±0.001\left<p_{\rm T}\right>_{\rm INEL}=0.483\pm0.001 (stat.) ±0.007\pm0.007 (syst.) GeV/cc and \left_{\rm NSD}=0.489\pm0.001 (stat.) ±0.007\pm0.007 (syst.) GeV/cc, respectively. The data exhibit a slightly larger <pT>\left<p_{\rm T}\right> than measurements in wider pseudorapidity intervals. The results are compared to simulations with the Monte Carlo event generators PYTHIA and PHOJET.Comment: 20 pages, 8 figures, 2 tables, published version, figures at http://aliceinfo.cern.ch/ArtSubmission/node/390

    ALICE Electromagnetic Calorimeter Technical Design Report

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    ALICE Technical Design Report on Forward Detectors : FMD, T0 and V0

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    ALICE PHASE EI SEP ACC S2

    ALICE Technical Design Report of the Computing

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    ALICE, EI PHASE SE
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