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                                                                            ‫ﺣﻞ اﻟﺘﻤﺮﻳﻦ -4-‬
                                                          ‫1-أ- اﻟﻘﻴﻤﺔ اﻟﻔﻀﻠﻰ ل ‪ PH‬اﻟﺘﺮﺑﺔ :‬
                                                                            ‫اﻟﻨﻮع 1= 51.7‬
                                                                                ‫اﻟﻨﻮع 2=6‬
                                                                            ‫اﻟﻨﻮع 3 =57.4‬
                                                                ‫ب- ﺣﺪود ﺗﺤﻤﻞ ‪ PH‬اﻟﺘﺮﺑﺔ :‬
                                                                    ‫اﻟﻨﻮع 1 = ﻣﻦ 5.6 اﻟﻰ 8‬
                                                               ‫اﻟﻨﻮع 2 = ﻣﻦ 5.4 اﻟﻰ 52.7‬
                                                                     ‫اﻟﻨﻮع 3 = ﻣﻦ 4اﻟﻰ 5.5‬
                                                              ‫2- ‪ = PH‬ﻳﺸﻜﻞ ﻋﺎﻣﻼ ﻣﺤﺪدا‬
‫3- درﺟﺔ ﻧﻤﻮ آﻞ ﻧﻮع ﺗﻜﻮن آﺒﻴﺮة ﻋﻨﺪﻣﺎ ﻳﺰرع ﻟﻮﺣﺪﻩ، وﺗﻜﻮن اﻗﻞ ﺣﻴﻨﻤﺎ ﻳﺰرع ﺑﻮﺟﻮد اﻧﻮاع ﻧﺒﺎﺗﻴﺔ‬
                                                                                ‫اﺧﺮى.‬
                                                          ‫4- اﻟﻨﻮع ‪ =a‬ﻳﻔﻀﻞ ‪ PH‬ﺣﻤﻀﻲ.‬
                                                           ‫اﻟﻨﻮع ‪ =b‬ﻳﻔﻀﻞ ‪ PH‬ﻗﺎﻋﺪي.‬
                                                                                   ‫ﻋﻼﻗﺔ ﺗﻨﺎﻓﺲ‬

				
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