Shekarun ilimin halittar jiki muhimmin ra'ayi ne a cikin samar da dankalin turawa. Yana ƙayyade lokacin da buds za su tsiro da yawa harbe za su ci gaba daga gare su. Wannan rinjayar yawan mai tushe da ganye girma, tuber ci gaban, tuber yawan amfanin ƙasa da tuber size. Tsofaffin tsaba ba su da tsiro mafi girma ɗaya, amma da yawa.
Tsawon lokaci shine adadin kwanakin tun lokacin da aka samu tuber. Shekarun ilimin lissafi yana nufin shekarun ciki na tuber kamar yadda canje-canjen biochemical ke shafar shi.
Kamar shekarun tarihin lokaci, shekarun physiological yana canzawa akan lokaci. Amma kuma yana shafar kwayoyin halitta (kamar halayen iri-iri) da matsalolin muhalli.
Ana amfani da ra'ayoyi iri ɗaya don fahimtar tsufa a cikin mutane. Wasu mutane suna bayyana ƙanana-ko girmi-fiye da gaske. Genetics shine mafi girman alhakin yadda muke tsufa, amma zaɓin salon rayuwa kuma na iya zama mahimmanci.
Tsire-tsire suna shaƙatawa don sakin kuzarin da suke buƙata don ci gaba da aiki na sel - sitaci da sukari ana cinye su don samar da kuzari.
Lokacin da tsire-tsire ke cikin damuwa, suna ƙara numfashi. Duk wani yanayi da cewa ƙara da kudi na numfashi kara da tsufa aiwatar da tubers (m yanayin zafi, rashin danshi, na gina jiki deficiencies, kwaro infestation da inji lalacewa a lokacin girbi). Damuwar da ke faruwa a kowane lokaci a cikin rayuwar tuber na iya hanzarta tsufa; amma yawancin bincike sun nuna cewa yanayin girma yana da ƙarancin tasiri akan shekarun ilimin lissafin jiki fiye da yanayin bayan girbi.
Physiologically, wani matashi tuber ne halin kasancewar daya rinjaye toho, wanda suppresses da germination na sauran buds a kan tuber.
Wannan al'amari a cikin tsire-tsire ana kiransa apical dominance, wani karbuwa wanda ke inganta haɓaka sama maimakon reshe. A cikin tubers dankalin turawa, sakamakon shine shuka tare da ƙananan mai tushe da ƙananan ƙananan tubers amma ya fi girma.
Tsofaffi iri tubers suna halin asarar apical rinjaye. Suna ba da sprouts da yawa waɗanda suka bayyana a baya. Wannan yana nufin ƙarin mai tushe da ƙarin tubers, amma girman tubers ya fi karami.
Tsofaffin tubers suna yin ƙasa da ganye kuma suna kai girma a baya fiye da ƙananan tubers.
Dasa tsofaffin iri na iya taimakawa sosai wajen girma iri dake kan samar da manyan tubers, kamar 'Yukon Gold' ko 'Shepody'.
Ƙananan tsaba suna girma a hankali, amma suna samar da shuka mai ƙarfi tare da tsawon lokacin kumburin tuber kuma daga baya girma.
Amma masu noman suna buƙatar sa ido sosai kan girbi zuwa ƙarshen kakar kuma su cire haƙarƙari cikin lokaci don iyakance samar da manyan tubers.
Ƙarin takin mai magani na nitrogen na iya ɗan rage tasirin tsufa da jinkirta farawa. Nitrogen zai iya taimakawa wajen kwatanta halayen matasa tubers saboda yana da tasiri mai karfi akan kwayoyin shuka wanda ke tsara tsarin tsufa. Amma har yanzu akwai haɗari na farkon tsufa idan amfanin gona ya damu ko kuma an rage matakan nitrogen da wuri.
Idan tsaba sun kasance matasa na physiologically kuma kun damu da cewa adadin stalks zai yi ƙasa sosai, za ku iya haɓaka yawan zafin jiki don tsufa da tsaba ko jinkirta shuka.
Idan tsaba sun tsufa a jiki kuma zasu samar da mai tushe da yawa, yakamata ku kula da kyawawan yanayin ajiya don rage tsufa da shuka iri da zaran yanayin filin ya ba da izini.
Wasu masu noman suna ba da rahoton nasarar raguwar tushe tare da Rejuvenate (Amvac), maganin iri wanda ya ƙunshi hormone na shuka na roba don taimakawa maido da rinjaye apical. Sakamako na iya bambanta ta iri-iri da wasu yanayi.
Mafi m hanyar tantance physiological shekaru iri tubers a cikin ajiya shi ne tattara samfurin da kuma lura germination aiki bayan dumama.
Samfurin ya kamata ya zama babba don wakiltar sauye-sauye a cikin adadin iri.
Makonni kadan kafin ranar da ake sa ran shuka, a yanka tubers na iri gunduwa-gunduwa (idan za ku shuka yankakken iri) sannan a sanya su cikin jakunkuna na raga ko kuma a dasa su a cikin ƙasa. Ka lura da saurin da suke fitowa da kuma yawan tsiro da aka samar.