Amount of land

Question: amount of land

good evening,
I kindly wanted to know how many liters of land and what kind of soil should be placed in a concrete planter with a width of 100 cm, height 37 cm and depth 33 cm. and if in addition to the land together we must put another product. The type of plant that I have to put is a photinia.
waiting for an answer I greet you cordially

Amount of soil: Answer: amount of land

Dear Rocco,
fortunately the metric system helps us, the volume of a liter of land is equivalent to a cube of ten centimeters in diameter, or a cubic decimeter equals one liter in volume, and if it is water, it is also a kilogram; then, by measuring the volume of your vase, you will have its capacity, or how many liters of water (or land) it can contain; being your measurement in centimeters, we transform it into decimeters, that is we divide the numbers by 10, and then we multiply the three numbers together, to obtain the cubic volume of the vessel in dc. 10x3.3x3.7 = 122.1: your pot contains about 120 liters of soil. Consider that the small bags of soil are about 25 liters, the big ones normally are 50 liters, but there are also 80 liters. If the soil has been well preserved and is of good quality, it will have been bagged beautifully vaporous and not compact, so consider that buying a little more than it should, so you can compact it well around the bread of roots, otherwise you will find yourself with the ground that lowers a lot with the first watering. Choose an excellent potting soil, possibly ask in the nursery if you give a sack or two of what they use to plant shrubs in gardens, which usually also contains some pebbles, to improve drainage. You also spend a few euros more to have a top-quality soil, because low-cost soil often tends to dry out, forming a hard and almost impermeable earthen bread, which tends to lock up the roots without allowing them to develop well. In a vase as big as yours you can also place two small plants of photinia, or a single plant, which will have all the space it needs to develop at its best. Put some soil on the bottom of the pot, then place the ground bread of the fotinia, so that the top of the soil reaches the inside edge of the pot, or just below it; then fill with earth, taking care not to create air pockets, and to keep the photinia at the exact same depth it was in the nursery pot. With the palm of your hand, compact the earth well, and add more if necessary; then water, and if you notice that the soil is lowered a lot, put a little more. The soil that is sold in nurseries usually already contains some soil improver and fertilizer, so you can wait a few weeks before spreading a slow release granular fertilizer on the ground.