EFFECTS OF VARYING LEVELS OF PHOSPHORUS AND POTASSIUM APPLICATIONS ON PRODUCTIVITY, AND BOTANICAL AND CHEMICAL COMPOSITION OF A LADINO CLOVER-TIMOTHY ASSOCIATION
[摘要] Phosphorusandpotassiumwereappliedseparatelyatfivelevels—0,60,120,180and240poundsperacre—andinallcombinationspriortoseedingaladinoclover-timothymixture.Plotswerecutfourtimesperseasontoaheightof3inches.Forageyieldswereobtainedduring1954,1955and1956fromaseedingmadein1953onCoaticooksiltloamsoilattheExperimentalFarm,Lennoxville,Quebec.Phosphorusfertilizationhadnosignificanteffectoncloveryieldsbutcauseddistinctincreasesintimothyyieldsin1954and1955.Cloveryieldsincreasedlinearlywithincreasinglevelsofpotassiumupto120poundsperacrein1954andupto180poundsin1955.In1956,theincreaseinyieldswasalinearfunctionofratesofpotassiumapplication.Potassiumfertilizationdepressedtimothyyieldsin1954buthadnoeffectin1955and1956.Thepercentageofcloverintheharvestedforagetendedtoincreasewithincreasingratesofpotassiumandtodecreasewithincreasingratesofphosphorus.Thereversewa...
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[效力级别] [学科分类] 农业科学（综合）
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