Irrigation of crops led to salinization of the soil, Sumer was located on a flat plain that provided no natural barriers to invasion, and the land became too swampy to grow adequate crops.
assuming efficiency of each man to dig trench, in one day, for one hour is constant,
so one man, working for one hour in one day can dig 1.5 m
so 8 men, working 3 hours a day and will take, say $d$ number of days and efficiency will be constant. so,
$\frac32=\frac{220}{8\times3\times d}$
$\implies d=\frac{55}9=6.12$
Answer:
plantation agriculture
Explanation:
Plantation agriculture is generally referred to as a Large farm that is mostly based on a particular crop. Often Cash crops are usually cultivated and later harvested to sell to make a profit. It is also the concept of growing vast amounts of cash crops to be sold at the market for personal profit.
Hence, in this case, the correct answer is "PLANTATION AGRICULTURE"
