Resha niz chun digar uzvhoi rastani ba oksigeni havo ehtiyoji kalon dorad. Resha dar vaqti nafaskashi oksigeni havoro nafas girifta gazi karbonatro khorij mekunad. Inro bo tajribai oddi isbot kardan mumkin ast. Agar niholi mushungi (lubiyo yo nakhudi) dar arramayda sabzondashudaro girifta, arramaydahoyashro afshonda ba dokhili probirka guzorem 38 va …

Dar kishtzorhoi khokashon az moddahoi gizoi kambagal hosilnokii ziroathoi kishovarzi nihoyat kam ast. Baroi baland bardoshtani hosilnokii chunin zaminho ba khok nurihoi gunogunero, ki norasoiashon nazarras ast, meandozand. Nuriho du khel meshavand: nurihoi organiki va madani. Nurihoi organiki (az kalimai organizm) moddahoe meboshand, ki dar natijai faoliyati hayotii rastaniho va …

Ahamiyati on baroi hayoti rastaniho. Muhofizati khok: Reshai darakhton sabzida, ba qabathoi chuquri khok shokha ronda, gafs meshavad va tanai khele vazninu bohashamati shokhahoi serbargro mustahkam nigoh medorad. Albatta, na hamai rastaniho monandi darakhtoni azimjussa reshai ustuvoru shokharonda dorand. Reshai rastanihoi alafii yaksola nisbatan khurd buda, ba zamin chuqur namedaroyad. Tamomi …

Resha dar hayoti rastaniho ahamiyati avvalindaraja dorad. Rastaniho ba vositai reshaashon dar khok ustuvor joygir shuda, az on ob va moddahoi madanii baroi hayotashon zaruriro megirand. Baroi isboti in guftaho tajribahoi gunogun kumak merasonand. Agar yagon rastanii dar reg yo arramaydai namnok parvarish kardashudaro girifta, bo reshaash ba dokhili probirka …

CHi tavre ki shumo allakay medoned, ob va moddahoi madaniro rastani az khok ba tufayli muyakreshahoyash mejabbad. Dar khok ob dar shakli kholis vujud nadorad. Vay metavonad dar shakli mahluli khoki, ki namakhoi madanii dar ob halshavanda dorad, dastrasi rastaniho gardad. Minbad dar rastani ba mahluli in moddaho chi hodisa …

Malum ast, ki hangomi ba neshzani shuru kardani tukhm, pesh az hama reshachai janin nesh zada mebaroyad. Saravval on kam ayon buda, vale ba zudi kad kashida kalon meshavad. In hodisa chi tavr amali megardad? Reshachai janini tukhm va reshai rastanii nashunamokunanda monandi digar uzvhoi rastani niz az hujayraho iboratand. …

Muhlati kishti maysa: Hangomi chashidani tami tukhmi nasabzida (baroi muqoisa), sipas doni neshzadai jav, gandum yo javdor, shumo ba andak shirin budani tukhmi neshzada bovari hosil mekuned. Zero hangomi sabzishi tukhm ohari endospermi tukhm az tasiri ob va moddahoi makhsus ba kand tabdil meyobad. Sipas, qand dar shakli mahluli obi …

Baroi nafasgirii organizmhoi (mavjudoti) zinda, az on jumla rastaniho, hayvonot va odam gazi oksigen (havo) zarur ast. Oksigen inchunin ba suzish yori merasonad. Gugirdchubi afrukhta dar mu- hiti havo khele khub mesuzad, zero dar on oksigen hast. Ammo agar yagon zarfi shishagiro bo havoi nafasbaroriamon pur karda, ba on gugirdchubi …

Tukhmi janinash zindavu solim metavonad sabzida, nashunamo kunad va rastanii navro ba vujud ovarad. Dar baze holatho az osebi hasharothoi zararrason, magorbandi yo dar natijai miqdori ziyodi obashro gum kardan va sababhoi digar janin nobud megardad. Inchunin, janin dar natijai solhoi duru daroz nigoh dosh- tani tukhmi niz nobud meshavad. …

SHinosoiro bo hayoti rastani az omuzishi sokhti tukhm (don) va sabzishi on ogoz mekunem.Mebinem, ki doni lubiyo kalon buda, agar yak tarafi donash barjasta boshad, tarafi digari on furukhamida meboshad. Rui don bo pusti suftai jilodor ihota gardidaast. Pust tukhmro az khushkshavi va digar osebho muhofizat mekunad. Pusti tukhmi lubiyo …