Approximately, how much kg of soil is in one square yard?

i need to know how much hydrated lime should be used to change the ph of 3kg of loam soil by 1 level. --%26gt; Add 8 ounces of hydrated lime per square yard in loamy soils



and...

i need to know too how much aluminum sulfate must be used in 3kg soil if 1 square feet would need 2.4 ounces to change the ph level of 1 square feet of loamy soil by 1 level.Approximately, how much kg of soil is in one square yard?
There are exactly no Kgs in 1sq yd of soil. To get mass you must have volume. (3 dimensions) you are describing surface.



In your case, assume that the Lime will treat one ';square'; yard about 3 inches deep. or .0833yd X 1 x 1 = .0833 cubic yds.



Top soil weighs between 2000 to 2700 lbs per cubic yd, depending on compaction and composition....so .0833 x 2500 =208 lbs +/-



208 lbs = 94 kilograms. I deduce that you apply .085 ounce per kilo, so 3 x .085 = .25 oz, or add 1/4 ounce to your 3 kilos and mix well.



Use a ph meter or test kit from the garden shop to test the final product. It takes a period of time for the chemical reaction (process) to complete. Slightly moist soil mixed or turned completely 3 or 4 times in a week should amend the ph. Give it a try.



Al Sulfate , again, assuming 3 inchs deep x1ft x1ft = 0.25 cubic foot. 1 cubic foot of soil is about 35 to 40 kilos ....so 0.18 ounce to your 3 kilo of soil. Again mix well and allow sufficient time for the chemical reaction to amend the soil. Moisture and heat accelerate the process. Good Luck.