Irrigation. 



6r 



lurrows. the — ^-"^ 



lo Jan.. 191 1 .] 



and making theii 

 checks afterwards by 

 ploughing two fur- 

 row.s, backing one 

 up against the other 

 as in No. 37. It 

 is most unsightly 

 and ineffective, 



water is wasted in 

 the 



area sown is 

 diminished, the pas- 

 sage of implements 

 is at lea.st hindered, 

 time is lost in har- 

 \esting through ha\- 

 ing to deal with the 

 areas between 

 •checks separately, 

 and, lastly. the 

 crown from want 

 •of consolidation is 

 gradually washed 

 and trodden into 

 the furrows until it 

 disappears. 



In the drawing 

 under consideration, 

 the head ditch (de- 

 riving its supplv 

 from the main chan- 

 nel running parallel 

 with it), is shown 

 along the side 



marked AB, the laml was graded flat between the checks and so that 

 the direction of flow of w.iter is Avestwarfls. Other check banks were 

 ,^ made along the sid?s AC, CD. 



34. FIELD SET OUT FOR GRADING. 

 Interval t liock Hanks iiiarkeil A'.. I'-.Z. 



chS^ 



s ur/o^e D and BD, and as the boundaries 

 '"""'""""' there were fenced another 



method of making them 



2il. AFTER FIRST I'A.SSAGE OF -SMOOTHER. . . ,^ . 



was miperative. I wo furrows 

 were ploughed along these lines and the checks thrown up by means of 

 the crowder, which will be described 1 it.r. The machine was run along 

 the furrows twice and very little rrrrTTTTrmTtt 



36. COMPLETED CHECK BANK. 



shovel work was afterwards neces-// 

 sary to make a perfect job. This 

 left an open furrow or ditch 

 running along three sides of the ploi 

 ■'Useful drain lor riiiiniiiL: off anv 



111(1 outside thereof, and serves as a 



excess water, which from the levels 



r shown, will be noticed to concen- 



/ V rrrrr,, „ „ r r „ r rr^ -, u aW at tile poMit O aiKi c.scapo nito 



UNSATi.SKACTORY CHECK BANK. the Waste ditih there provided. 



■ r - r' > ' rTrr r rn 



37- 



r^ 



There is much misconception as to the proper location of checks but. 

 generally spe, iking. th'V shouM lie at about right angK's to the contours. 



