Laserfiche WebLink
<br />C> <br />,-~, <br /> <br />...... <br />00 <br />-.J <br />(l;l <br /> <br />Office, 1973). It is important to note that where double cropping is practiced, <br />the total number of irrigations on both crops would be used to enter the table. <br />The sprinkler applications would be at 0.1 inch per hour so that a 24-hour <br />period would give the required 2.4 inches. This could be broken into two 12- <br />hour periods where soil begins to puddle or to three 8-hour periods. <br />To reconcile the Guidelines and base yearly irrigations of 16 per year, <br />use tomatoes, p. 57, for an example. The Guidelines calls for 10 irrigations <br />per year. Table I shows 10 irrigations starting in January through July for <br />the 16 per year column. These same months show 14, 18, 22 rounds of irrigation <br />for the yearly frequenciescof 22, 29, and 35. To get base yield data use the <br />yIelds provided in tables 6, 10, 13, and 18 for California and tables 3 and <br />10 for the Arizona work. These yields are based upon the reported data, <br />whereas, the Guidelines yield is a general estimate. <br />The sprinkler system considered here is a permanent one which could be <br />operated at will, and the cost of power would be a function of the total hours <br />of use, Such a system could be obtained for $800 to $1,000 per acre and written <br />off over 10 years. Maintenance is estimated at $50/acre/year. <br /> <br />Table 5. Crop acreage distribution in Imperi a I County in I,OOO's of acres. <br /> Soil drainage class <br /> Holtvi I Ie and <br /> Imperial <br />Crop Indio Meloland stratified Imperial comp L~!S. <br />Lettuce 12 12 12 <br />Carrots 2 2 <br />Onions 1 I <br />Tomatoes 0.5 0.5 1.0 <br />~/aterme I on I 1 1 <br />Cantaloupe 4 4 4 <br />Asparagus 4 <br />Sorghum 12 12 19 7 <br />Hheat 3 3 23 20 <br />Barley 3 3 23 20 <br />Sugar beet I I 31 30 <br />Cotton 2 24 12 <br />Alfalfa 20 46 80 12 <br /> <br />20 <br />