二.土壤酸度类型 Soil ph A 500 至
二.土壤酸度类型
二.土壤酸度类型 Diagram of Soil pi and Active and Reserve Acidity Reserve Acidity Low p High pi Soil Soil ● Aetive Acidity :+ ion Basie Cation Clay Mineral Ca++) Soil solntion
二.土壤酸度类型
三,土壤酸度的指标 (一)土壤酸度的强度指标(液相指标)-pH值: pH-The scientific definition is the negative logarithm of the Hydrogen ion concentration 依据对植物的影响程度将土壤pH分为以下等级 土壤减的级 等级 pH值 超强正度 35 极强度 35-44 强砖性 4 张性 5564 甲性 6s→75 品性 7b~85 强碱注 86-95 极强碱性 a95
三.土壤酸度的指标 （一）土壤酸度的强度指标（液相指标）----pH值： pH -The scientific definition is 'the negative logarithm of the Hydrogen ion concentration 依据对植物的影响程度将土壤pH分为以下等级
土壤酸度的指标 Soil ph Acidi Neutrality Alkalinity ve Mod- Mud- er Strong Strong erate Slight Slight erate Strong Stryn g PH 3 PH 4 PH5 PH 6 PHT 8 PH? ph H of PH range of H range of Highly acidic mineral soils mineral soils al kaline eats in humid regions n arid regions soils
三.土壤酸度的指标
三,土壤酸度的指标 Descriptive terms commonly associated with certain ranges in soil pH are extremely acid than 4.5 lemon=2. 5; vinegar=3.0 stomach acid =2.0 soda=2-4 very strongly acid45-5.beer=4.5-5.0,tomatoes=4.5 strongly acid 5.1-5.5 carrots=5.0: asparagus=5.5: boric acid=5.2 cabbage=5.3 moderately acid 5.6-6.0 potatoes=5.6 slightly acid 6.1-6.5 salmon=6. 2; cow's milk=6.5 neutral 6.6-7.3 saliva=6.6-7.3: blood=7.3 shrimp=7.0 slightly alkaline 74-78eggs=7.6-78 moderately alkaline 7.9-84 sea water=8. 2: sodium bicarbonate=8. 4 strongly alkaline 85-90 borax=9.0 very strongly alkaline> than 9.1 milk of magnesia=10. 5, ammonia=11 lime= 12
extremely acid < than 4.5 lemon=2.5; vinegar=3.0; stomach acid=2.0; soda=2 - 4 very strongly acid 4.5 - 5.0 beer=4.5 - 5.0; tomatoes=4.5 strongly acid 5.1 - 5.5 carrots=5.0; asparagus=5.5; boric acid=5.2; cabbage=5.3 moderately acid 5.6 - 6.0 potatoes=5.6 slightly acid 6.1 - 6.5 salmon=6.2; cow's milk=6.5 neutral 6.6 - 7.3 saliva=6.6 - 7.3; blood=7.3; shrimp=7.0 slightly alkaline 7.4 - 7.8 eggs=7.6 - 7.8 moderately alkaline 7.9 - 8.4 sea water=8.2; sodium bicarbonate=8.4 strongly alkaline 8.5 - 9.0 borax=9.0 very strongly alkaline > than 9.1 milk of magnesia=10.5, ammonia=11; lime=12 Descriptive terms commonly associated with certain ranges in soil pH are 三.土壤酸度的指标