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A soil pH of 6.5 – 7.5 is considered optimal for phosphorus availability. In this pH range, phosphorus is less likely to form insoluble compounds with iron and aluminum in acidic soils or with calcium in alkaline soils, making it more accessible for plant uptake.
212 + 14 × 23 – 28 × 15 = ?
2/5){(3/5) × 750 + 40% of 375} = ? × 16
116*2/3% of 18600 + 666*2/3% of 1290 = 457*1/7% of 1750 + 555*5/9% of 3150 + ?
30, 39, 66, ? , 174, 255
(65% of 120) = 25% of ? - 22
(60/15) × 25 + 152 – 18% of 200 = ?2
? = 6.25% of 240 + 25 2 + 17 2 – 16 × 17
? ÷ [35% of 379 - 34(4/5)] = 0.4
2222 ÷ 22 + 992 ÷ 16 + 650 ÷ 25 = ?