What is Seed drill?
[[File:1902 Monitor seed drill detail.jpg|thumb|250px|1902 model 12-run seed drill produced by [[Monitor Manufacturing Company]], [[Minneapolis]], [[Minnesota]]]] [[File:Sowing machine Nordsten.jpg|thumb|250px|A sowing machine which uses the seed drill concept]] A '''seed drill''' is a sowing device that sows the seed precisely in the soil at proper depth and distance. Then it covers them with soil. It protects the seeds from birds and saves time and labour. [[Jethro Tull (agriculturist) | Jethro Tull]] is widely thought of as having invented the seed drill, though earlier the Sumerians used a single-tube seed drill, and the Chinese had also used a multi-tube seed drill.<ref>{{cite book|title=The Genius of China: 3000 years of science, discovery and invention|url=https://archive.org/details/geniusofchina3000temp|last1=Temple|first1= Robert|author2=Joseph Needham|year= 1986|publisher = Simon and Schuster|location=New York |isbn= |pages=| postscript = <Based on the works of Joseph Needham>}} </ref> The use of a seed drill can improve the ratio of crop yield (seeds harvested per seed planted) by as much as nine times. == References == {{reflist}} [[File:ChineseSeedDrill1637.jpg|thumb|left|[[China|Chinese]] double-tube seed drill, published by [[Song Yingxing]] in the ''Tiangong Kaiwu'' [[encyclopedia]] of 1637]] [[Category:Agricultural machinery]]