[DOC] [TLE] plow | agriculture | Britannica.com [PAR] In the mid-19th century the black prairie soils of the American Midwest ... single 
bottom (share and moldboard), while tractor-drawn plows have from 1 ... farm 
implement used to pulverize soil, break up crop residues, uproot weeds, and 
cover seed. ... and other ancient peoples, and the Romans made harrows with 
iron teeth. [DOC] [TLE] disc plow rocky land - Yesterday's Tractors [PAR] I have 20 acres of rocky soil that hasnt been worked for probably 10 ... A disc 
plow is set up kinda like a regular plow, with one disc, one ... get out of control. 
breaking a fire break around the outside will help alot. ... I would like to chisel 
plow it, but the closest thing I have to that is a spring-tooth field cultivator. [DOC] [TLE] AP United States History 2013 Scoring Guidelines - The College ... [PAR] made up of over 6,000 of the world's leading educational institutions and is ..... 
Colonization was one way for critics of slavery to express their opposition to 
slavery. ..... The New England colonies' colder weather and hard, rocky soil made 
it ..... to invest in labor-saving devices for men's work, like plowing and harvesting,
. [DOC] [TLE] Plough - Wikipedia [PAR] A plough (UK) or plow is a tool or farm implement used in farming for initial 
cultivation of soil in ... The plough represents one of the major agricultural 
inventions in human ... unless an initial ploughing is necessary to break up 
hardpan on a new plot to .... These heavy ploughs led to greater food production 
and eventually a... [DOC] [TLE] Which 3 point category 1 implement would be most useful? [Archive ... [PAR] If you could buy one implement to break up virgin soil for a food plot, what would 
it be ... sure how a 25hp tractor would pull a springtooth or any other plow type 
implement. .... Lookin at Dales pic of the spring tooth, that's what I was calling a 
chisel. ... A tiller would be the best unless you have rocky ground. [DOC] [TLE] Harrow - RitchieWiki [PAR] Sep 28, 2008 ... Helpful Tips ... Harrows of many types and sizes exist to carry out these various 
functions. ... 2.1 Seed Harrow; 2.2 Spike-tooth Harrow; 2.3 Spring-tooth Harrow; 
2.4 Disc ... This strong, hardy device was used for breaking up land in the winter 
... Developed in the early 19th century, the spike-tooth harrow was... [DOC] [TLE] American Farm Tools - Scribd [PAR] Rocky soil in .... When the farmer's homemade plow broke, he had little hupe of 
repairing it exactly. Or. if a .... Generally. these early cast-iron plows had difficulty 
penetratirn the soil ..... The first patent for a spring-tooth harrow was made in 
1869. ... From antiquity until the mid-nineteenth century. farmers planted seed by 
hand. [DOC] [TLE] The Founders, Farms and Facts - The Lehrman Institute [PAR] Many of the American Founders were farmers  and the best of them like .... By 
adding more teeth to a drag harrow; he was able to break up the soil ... Since 
Washington had 'one of the best kinds, would it not be useful to put .... 34 By the 
beginning of the 19th century, Virginia's most valuable asset was not land, but 
slaves. [DOC] [TLE] lake - National Geographic Society [PAR] Sep 15, 2011 ... Lake Vostok, in Antarctica, is one of the largest subglacial lakes in the ... was a 
favorite place of the so-called Lake Poets, a group of 19th-century ... changed the 
Earth's crust, making it buckle and fold or break apart. ... Other organisms feed off 
these plants and algae, creating a complex, ..... plow, noun, verb. [DOC] [TLE] Wheat From Field To Flour - Nebraska Wheat [PAR] Wheat flour is one of the most nutritious plant foods available, offering an .... 
Some wheat requires a specific type of soil to grow in. ... Durum  Durum is a 
spring-seeded wheat, harvested in

Question: The 19th century spring tooth one of these plow-like devices was useful for breaking up rocky soil
Answer: harrow