The phrase "are much shallower" is not correct in standard written English.
It may be intended to compare the shallowness of two or more subjects, but the structure is awkward and unclear.
Example: "The lakes in this region are much shallower than those in the northern part of the country."
Alternatives: "are significantly shallower" or "are considerably less deep."
"Also because a lot of arable crops or grassland crops the rooting depths are much shallower, a lot of the changes are happening in the top 30cm," Dr Rowe told BBC News.
Some night foraging does occur, but these dives are much shallower, ranging from only 3-6 m in depth.
Given that the torpor bouts reported in mouse lemurs are much shallower and shorter than those of a true hibernator, the 35% overall reduction of protein turnover would be only partially explained by the 5-fold increase in torpor expression in wintering animals.
Where the native species root systems are as deep as those of the invaders, there will be little or no gain in the long-term, but where they are much shallower the long-term gains could be large.
The estimated mean ages of the deepest splits within clades A, B and C are approximately 0.17-0.28 MYA (Fig. 2), although most divergences are much shallower (and many haplotypes are identical).
The minimum of the former is much shallower, however, showing that forces between molecules are typically much weaker than the forces responsible for chemical bonds within molecules.
But he added that the pool of buyers was much shallower than it was a year ago, so he hoped to pick up some good deals soon.
It is much shallower on the tundra, ranging from 12 to 20 inches (30 50 cm), and very thin on the steppe, where 8 to 16 inches (20 40 cm) fall.
Mr Chirac lacked the stomach to fight French conservatism, which is centred on conserving the social acquis.France's theoretical acceptance of free markets is much shallower than its dedication to the state.
The recovery in frontier markets has been much shallower, leaving the index at less than half of its 2008 high, while the other two indexes have recovered nearly all of their lost ground.
In contrast, the 7-magnitude quake that struck Port-au-Prince on January 12 was much shallower – about eight miles deep – and right on the edge of a city where 3 million people lived.
