Which was not an effect of the New Deal programs on American life? Unemployment dropped significantly. Public works projects had a national impact. Government power grew. The economy rebounded to 1928 levels.

The economy didn't rebound to 1928 levels as an effect of the New Deal.

Explanation:

The New Deal was a set of political measures launched by the Democratic Party and its president, Franklin D. Roosevelt between 1933 and 1937, to act vigorously on what were considered to be the causes of the crisis caused by the Stock Market Crash of 1929. These measures were based on the theory of state interventionism.

The program, developed with the help of technicians and intellectuals from across the State, proposed financial measures such as the devaluation of the dollar, a deferral of bank payments and the reopening of banks, along with control measures. Other highlights were aid to small farmers, regulation of industrial work and large investments in public works. In short, the New Deal was a state intervention program in the economy, with specific measures aimed at achieving market equilibrium and reducing unemployment.

The results of the New Deal policy were limited and the deep economic crisis of overproduction was only overcome when World War II allowed the industry of the country, especially the arms industry, to sell large numbers of material.

the 4th option is the answer

clearcutting reproduces a new even-aged stand by completely removing the mature stand.

clearcutting as a silvicultural treatment has several characteristics:

it causes a sudden environmental change

it removes the seed source from the regeneration area

the configuration of the clearcut may affect seed dispersal

it begins a new rotation

it will eliminate some pests that require forest cover

overall, it temporarily removes the forest cover, transforming the forest community and environment.

clearcutting followed by artificial (seeded or planted) regeneration has several advantages:

we can avoid delay in restocking the site

we can introduce a selected species, seed source, and genotype

we can control arrangement and spacing

we can achieve uniformity in the new stand

we can overcome the problems associated with securing sufficient natural regeneration.

the shelterwood method involves the removal of most of the mature stand at the end of the rotation, but a portion of the mature stand is left standing.   the shelterwood method serves three basic purposes:

to prepare the stand for production of abundant seed

to modify the environment in a way that promotes germination and survival of the selected species

to build up the amount and size of advance regeneration to ensure the prompt restocking of the new stand following overstory removal.

the shelterwood method involves a sequence of 3 cuttings:

preparatory cuttings: make the seed trees more vigorous and set the stage for regeneration. see our thinning page for more information.

establishment/seed cuttings: open up enough vacant growing space to allow establishment of the new regeneration.

removal cuttings: uncover the new crop to allow it to fill the growing space.

the residual trees in the shelterwood must:

be sturdy and windfirm

be able to survive exposure

flower and reproduce seed

be the best trees of the mature stand

keep in mind that the shelter trees must not occupy the entire site.   a void must be created in order to make room for the new regeneration. the amount of shelter to leave will depend on the following factors:

species characteristics (seeding and shelter requirements)

the number of cuttings in the cutting sequence (1, 2, or 3)

landowner objectives

the size of the area to be regenerated

the final removal harvest level required to be profitable

the shelter must be removed before it impedes the growth of the new stand or threatens its survival.