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<article xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.3" xml:lang="en">
  <front>
    <journal-meta>
      <journal-id journal-id-type="publisher-id">research-focus</journal-id>
      <journal-title-group>
        <journal-title>Research Focus International Scientific Journal</journal-title>
        <abbrev-journal-title abbrev-type="publisher">Research Focus</abbrev-journal-title>
      </journal-title-group>
      <issn pub-type="epub" publication-format="electronic">2181-3833</issn>
      <publisher>
        <publisher-name>Ilm-fan va innovatsiyalar akademiyasi</publisher-name>
      </publisher>
    </journal-meta>
    <article-meta>
      <article-id pub-id-type="doi">10.66073/researchfocus.v5i3.2340</article-id>
      <article-id pub-id-type="other" assigning-authority="relibrary.uz">REL-A-013467</article-id>
      <article-categories>
        <subj-group subj-group-type="oak">
          <subject>06.00.00</subject>
        </subj-group>
      </article-categories>
      <title-group>
        <article-title xml:lang="en">INFLUENCE OF MAIN, REPEATED, AND INTERMEDIATE CROPS ON INCREASING COTTON YIELD IN SHORT-ROTATION CROP SYSTEMS</article-title>
        <trans-title-group xml:lang="ru">
          <trans-title>ВЛИЯНИЕ ОСНОВНЫХ, ПОВТОРНЫХ И ПРОМЕЖУТОЧНЫХ КУЛЬТУР НА ПОВЫШЕНИЕ УРОЖАЙНОСТИ ХЛОПЧАТНИКА В СИСТЕМАХ КОРОТКОСРОЧНОГО СЕВООБОРОТА</trans-title>
        </trans-title-group>
        <trans-title-group xml:lang="uz">
          <trans-title>ҚИСҚА НАВБАТЛИ АЛМАШЛАБ ЭКИШ ТИЗИМЛАРИДА ҒЎЗА ҲОСИЛДОРЛИГИНИ ОШИРИШДА ОСОСИЙ ВА ТАКРОРИЙ ҲАМДА ОРАЛИҚ ЭКИНЛАРИНИНГ ТАЪСИРИ</trans-title>
        </trans-title-group>
      </title-group>
      <contrib-group content-type="author">
        <contrib contrib-type="author">
          <name>
            <surname>Haydarovich</surname>
            <given-names>Mahmudov Utkir</given-names>
          </name>
          <aff>Tashkent Branch of Samarkand State University of Veterinary Medicine, Animal; Husbandry and Biotechnology, Tashkent, Uzbekistan; Cotton Breeding, Seed Production and Growing Agrotechnologies Research Institute</aff>
        </contrib>
        <contrib contrib-type="author">
          <name>
            <surname>Meylikovich</surname>
            <given-names>Khalikov Bahodir</given-names>
          </name>
          <aff>Tashkent Branch of Samarkand State University of Veterinary Medicine, Animal; Husbandry and Biotechnology, Tashkent, Uzbekistan; Cotton Breeding, Seed Production and Growing Agrotechnologies Research Institute</aff>
        </contrib>
      </contrib-group>
      <pub-date publication-format="electronic" date-type="pub" iso-8601-date="2026-04-05">
        <day>05</day>
        <month>04</month>
        <year>2026</year>
      </pub-date>
      <pub-date date-type="collection">
        <year>2026</year>
      </pub-date>
      <volume>5</volume>
      <issue>3</issue>
      <fpage>38</fpage>
      <lpage>46</lpage>
      <permissions>
        <license xlink:href="https://creativecommons.org/licenses/by/4.0">
          <ali:license_ref>https://creativecommons.org/licenses/by/4.0</ali:license_ref>
          <license-p>This work is licensed under a Creative Commons Attribution 4.0 International License.</license-p>
        </license>
      </permissions>
      <self-uri xlink:href="https://relibrary.uz/REL-A-013467/"/>
      <abstract xml:lang="en">
        <p>The article presents the results of long-term (2022-2025) experiments on the influence of main and repeated crops of crotalaria (crotalaria juncea), intermediate crops of safflower (trifolium alexandrinum) and bermuda grass (trifolium resupinatum), and winter wheat on increasing cotton yields in short-term crop rotations under the conditions of typical sierozem soils of the Tashkent region. The results showed that when sowing crotalaria for one year with subsequent sowing of the intermediate crop shabdar + bersim, when sowing cotton for the second year and sowing winter wheat for the first year with subsequent sowing of the repeated crop crotaly, when sowing the intermediate crop shabdar + bersim, when sowing cotton for the second year and sowing winter wheat for the first year with subsequent sowing of the repeated crotaly when sowing winter wheat for the second year with subsequent sowing of the repeated crotalaria with subsequent sowing of the intermediate crop shabdar + bersim, the yield was 49.0-48.3-49.4 c/ha compared to the long-term and control variants.</p>
      </abstract>
      <trans-abstract xml:lang="ru">
        <p>В статье представлены результаты многолетних (2022-2025 гг.) экспериментов по влиянию основных и повторных культур кроталярии (crotalaria juncea) промежуточных культур шафдара (trifolium alexandrinum) и берсима (trifolium resupinatum) озимой пшеницы на повышение урожайности хлопчатника в краткосрочных севооборотах в условиях типичных сероземных почв Ташкентской области. Результаты показали, что при посеве кроталярии в течение одного года с последующим посевом промежуточной культуры шабдор+берсим, посеве хлопчатника в течение 2-го года и посеве озимой пшеницы в течение 1-го года с последующим посевом повторной культуры кроталярии посеве промежуточной культуры шабдор+берсим, посеве хлопчатника в течение 2-го года и посеве озимой пшеницы в течение 1-го года с последующим посевом повторной кроталярии, посеве озимой пшеницы в течение 2-го года с последующим посевом повторной кроталярии с последующим посевом промежуточной культуры шабдор+берсим урожайность составила 49,0-48,3-49,4 ц/га по сравнению с многолетним и контрольным вариантом.</p>
      </trans-abstract>
      <trans-abstract xml:lang="uz">
        <p>Мақолада Тошкент вилоятининг типик бўз тупроқлари шароитида қисқа навбатли алмашлаб экиш тизимларида ғўза ҳосилдорлигини оширишга асосий ва такрорий экин кроталария (crotalaria juncea), оралиқ экинлар шабдор (trifolium alexandrinum) ва берсим (trifolium resupinatum), кузги буғдой экинларининг таъсири бўйича кўп йиллик (2022-2025 йй) тажриба натижалари келтирилган. Натижаларга кўра, бир йил кроталария экиб, ундан сўнг оралиқ экин шабдор+берсим экилиб, 2 йил ғўза экилганда ва 1 йил кузги буғдой экиб, ундан сўнг такрорий экин кроталария экиб, ундан сўнг оралиқ экин шабдор+берсим экилиб, 2 йил ғўза экилганда ҳамда 1 йил кузги буғдой экиб, ундан сўнг такрорий кроталария экилиб, 2 йили эса кузги буғдой экиб, ундан сўнг такрорий кроталария экилиб, оралиқ экин шабдор+берсим экилганда кўп йилликга ва назорат вариантига нисбатан 49,0-48,3-49,4 ц/га ҳосил олишга эришилди.</p>
      </trans-abstract>
      <kwd-group xml:lang="en">
        <kwd>short-rotation crop rotation</kwd>
        <kwd>intermediate crop</kwd>
        <kwd>repeated crop</kwd>
        <kwd>crotalaria juncea shabdar (trifolium alexandrinum)</kwd>
        <kwd>bersim (trifolium resupinatum)</kwd>
        <kwd>winter wheat</kwd>
        <kwd>long-term experience</kwd>
        <kwd>sedirate crop</kwd>
        <kwd>soil fertility</kwd>
        <kwd>cotton</kwd>
        <kwd>yield</kwd>
        <kwd>additional crop</kwd>
      </kwd-group>
      <kwd-group xml:lang="ru">
        <kwd>короткоротационный севооборот</kwd>
        <kwd>промежуточная культура повторная культура</kwd>
        <kwd>кроталярия (crotalaria juncea)</kwd>
        <kwd>шабдар (trifolium alexandrinum)</kwd>
        <kwd>берсим (trifolium resupinatum)</kwd>
        <kwd>озимая пшеница</kwd>
        <kwd>многолетний опыт</kwd>
        <kwd>седиратная культура плодородие почвы</kwd>
        <kwd>хлопок</kwd>
        <kwd>урожайность</kwd>
        <kwd>дополнительный урожай</kwd>
        <kwd>коробочка</kwd>
      </kwd-group>
      <kwd-group xml:lang="uz">
        <kwd>қисқа навбатли алмашлаб экиш</kwd>
        <kwd>оралиқ экин</kwd>
        <kwd>такрорий экин кроталария (crotalaria juncea)</kwd>
        <kwd>шабдор (trifolium alexandrinum)</kwd>
        <kwd>берсим (trifolium resupinatum)</kwd>
        <kwd>кузги буғдой</kwd>
        <kwd>кўп йиллик тажриба</kwd>
        <kwd>седират экин</kwd>
        <kwd>тупроқ унумдорлиги</kwd>
        <kwd>пахта ҳосилдорлик</kwd>
        <kwd>қўшимча ҳосил</kwd>
        <kwd>кўсак</kwd>
      </kwd-group>
    </article-meta>
  </front>
  <back>
    <ref-list>
      <ref id="r1">
        <label>1</label>
        <mixed-citation>Khalikov B. Soil and fertility. // Agro ilm - Scientific Appendix of the Journal of Agriculture and Water Management of Uzbekistan No2. 2021. pp. 63-64.</mixed-citation>
      </ref>
      <ref id="r2">
        <label>2</label>
        <mixed-citation>Bozorov H.M. Khalikov B.M. Yakubov F. Sharifov O. Growth, development and yield of intermediate crops in crop rotation systems. // Bulletin of Agrarian Science of Uzbekistan No 5 (5) 2022 year. P. 8</mixed-citation>
      </ref>
      <ref id="r3">
        <label>3</label>
        <mixed-citation>Mirzajanova M. Effects of calcium- and magnesium-containing nitrogen fertilizers on the growth, development of cotton and changes in the weight of one boll of cotton // International scientific-practical conference actual issues of agricultural development: problems and solutions June 6-7, Tashkent 2023. P. 338.</mixed-citation>
      </ref>
      <ref id="r4">
        <label>4</label>
        <mixed-citation>Lin Sun, Zhechen Zhu. Testing cotton using natural experiments when alternating cotton with rice and other crops. // Series of Conferences. 2nd International Conference on Earth and Environmental Sciences, Materials Science, Energy Technology and Environmental Engineering 28-30 April 2017, Zhuhai, China 81 p.</mixed-citation>
      </ref>
      <ref id="r5">
        <label>5</label>
        <mixed-citation>Namozov F., Ismailov D. Influence of repeated and intermediate crops on cotton yield. // Agro ilm - Scientific Appendix of the Journal of Agriculture and Water Management of Uzbekistan No3. 2020. pp. 18-19.</mixed-citation>
      </ref>
      <ref id="r6">
        <label>6</label>
        <mixed-citation>Ravshanov A., Niyozaliyev B., Hasanova F. Factfulness - the main criterion for a cotton grower. // Journal of Agriculture and Water Management of Uzbekistan No. 6, 2022, p. 13.</mixed-citation>
      </ref>
      <ref id="r7">
        <label>7</label>
        <mixed-citation>Nurmatov Sh., Rakhimov A., Rakhmonov R. Influence of organo-mineral composts on the stubble and root residues of repeated soybean and potato crops in typical sierozem soils subject to irrigation erosion. // Journal of Agriculture and Water Management of Uzbekistan. 2020, No. 12, pp. 40-41;</mixed-citation>
      </ref>
      <ref id="r8">
        <label>8</label>
        <mixed-citation>Komilov K. Influence of mineral fertilizer rates and irrigation regimes on the accumulation of dry mass of cotton against the background of preceding crops. // Journal of Agriculture and Water Management of Uzbekistan. Special number[1]. 2023, pp. 4-5</mixed-citation>
      </ref>
      <ref id="r9">
        <label>9</label>
        <mixed-citation>Khalikov B., Yakubov F. Influence of continuous crop rotation of cotton and alfalfa on cotton yield. // Special Issue[2]. Agro ilm - Scientific Appendix to the Journal &quot;Agriculture and Water Management of Uzbekistan&quot; 2023. p. 6-7</mixed-citation>
      </ref>
      <ref id="r10">
        <label>10</label>
        <mixed-citation>Khalikov B., Hasanova F. High Cotton Yield. // Journal of Agriculture of Uzbekistan. No9 2013.</mixed-citation>
      </ref>
      <ref id="r11">
        <label>11</label>
        <mixed-citation>Iminov A., Khalikov B. Influence of leguminous crops on soil fertility and cotton yield. // Agro ilm - Scientific Appendix 5 (37) of the Journal of Agriculture and Water Management of Uzbekistan, 2015. P. 17-18.</mixed-citation>
      </ref>
      <ref id="r12">
        <label>12</label>
        <mixed-citation>Abdualimov Sh., Abdullayev F. Effectiveness of applying humic stimulants to cotton. // Tashkent - 2019.</mixed-citation>
      </ref>
      <ref id="r13">
        <label>13</label>
        <mixed-citation>Bozorov Kh. Influence of repeated and intermediate crops on cotton yield in crop rotation systems. // Journal of Agriculture and Water Management of Uzbekistan. No12 2023 44-45-46 b</mixed-citation>
      </ref>
      <ref id="r14">
        <label>14</label>
        <mixed-citation>Zokirov Kh., Normuratov O. Soil fertility and crop yields (on the example of Surkhandarya region soils). // Agro ilm - a special issue of the scientific application of the journal &quot;Agriculture and Water Management of Uzbekistan&quot; [2]. 2022. P. 77-78-79.</mixed-citation>
      </ref>
      <ref id="r15">
        <label>15</label>
        <mixed-citation>Khalikov B., Negmatova S. The importance of intermediate crops in short-term crop rotations. // Tashkent 2020. 6-1373-75-83-88-94-121 p.</mixed-citation>
      </ref>
      <ref id="r16">
        <label>16</label>
        <mixed-citation>Khalikov B., Iminov A., Namozov F. Repeated crops bring double aroma. // Journal of Agriculture and Water Management of Uzbekistan. No. 6, pp. 10-11, 2020.</mixed-citation>
      </ref>
      <ref id="r17">
        <label>17</label>
        <mixed-citation>Khalikov B. Soil and Fertility. // Agro ilm - Scientific Appendix of the Journal of Agriculture and Water Management of Uzbekistan No2. 2021. pp. 63-64.</mixed-citation>
      </ref>
      <ref id="r18">
        <label>18</label>
        <mixed-citation>Iminov A., Khalikov B., Mirzayev Sh. Importance of growing repeated and intermediate crops after winter grain crops in short-term crop rotations and their cultivation agrotechnology. // Journal of Agriculture and Water Management of Uzbekistan. Special number[1]. 9-10-11 p. 2023.</mixed-citation>
      </ref>
      <ref id="r19">
        <label>19</label>
        <mixed-citation>Khalikov B., Iminov A., Namozov F. Repeated crops bring double income. // Journal of Agriculture and Water Resources of Uzbekistan No6. 2020. P. 10-11.</mixed-citation>
      </ref>
      <ref id="r20">
        <label>20</label>
        <mixed-citation>Jumaboev Z. Influence of repeated crops on cotton yield and technological properties of fiber. // Journal of Agriculture and Water Management of Uzbekistan. Special number. 2019. P. 6-7.</mixed-citation>
      </ref>
    </ref-list>
  </back>
</article>
