Sentence examples for difficult natural conditions from inspiring English sources

These patterns are likely to continue to be true, particularly given the difficult natural conditions of agriculture in the Sierra and the relatively small amount of arable land available there.

Like many other bird species in captivity they can live much longer without having to endure difficult natural conditions, and have possibly survived up to 68 years in zoo collections.

The improvement included assistance measures to facilitate multi-story forest operations and also natural forest operations where natural forest regeneration is expedited under difficult natural conditions.

Trophic studies in host-parasite networks are scarce and traditional approaches applied to characterize parasite feeding preferences and host use have important drawbacks or are of difficult endeavour in natural conditions [4].

Keratin, which is one of the most abundant hard materials in soil, is difficult to degrade under natural conditions.

Such transmission is often difficult to assess under natural conditions, and therefore most studies have employed artificial experimental setups, using a variety of arthropods including mosquitoes, stable flies, and Tabanids (e.g., horse flies and deer flies).

Assessment under natural conditions is difficult because, under most circumstances, NO3- and NH4+ are simultaneously present in the soil and their concentrations change both spatially and temporally over a wide range (e.g., 20 μM to 20 mM) [ 1, 2].

Sexual conflicts are notoriously difficult to study as the evolutionary forces of males and females often balance each other under natural conditions, and are difficult to separate from other evolutionary forces on male female interactions (Rowe and Day 2006).

Artificial backcrosses produced fertile progenies which resembled the parental phenotypes, indicating that under natural conditions it is difficult to detect hybrid derivatives [9], [14].

1989 - An extensive deposit of gold is discovered on Greenland, but natural conditions make exploitation extremely difficult.

Artificial backcrosses produced fertile progenies which resembled the parental phenotypes, indicating that under natural conditions it will be difficult to detect hybrid derivatives [9], [14].