1019] FIELD "HOPS. 433 



Approximately 2,500 lbs. of vetch seed grown between orchard trees were 

 harvested from 10 acres of land. 



[Report of field crops work on the Yuma reclamation project experiment 

 farm in 1917], R. E. Br.Aiu (T. .S*. lh pi. Ayr., liur. Plant Influx., Work Yuma 

 Expt. farm, 1917, pp. 14-21, 23-32, 45, jiijs. 7).— This describee the continuation 

 of work along the same general lines as piv\ lousl; noted < EC. S. it., :'.:•. p, 48 



in cotton variety tests the Egyptian varieties Pima and Yuma, u selected 

 strain of Durango, and Dixie, a short staple sort, were the highest yielding 

 kinds, producing 2,184, 2,109, 2,022, and 2,020 lbs. of seed cotton p.-r ucre. resp 

 tively. Larger plantings of Pima, Yuma, Durango, Acala, and Tuxtla resulted In 

 average yields of seed cotton amounting to 1,609, 1,680, 1,882, 2,033, and l.'.ns 

 lbs. per acre, respectively. The estimated total cost of production ranged from 

 $107.86 per acre for Tuxtla to $139.57 for Yuma, while the total net return per 

 aere ranged from $122.49 for Tuxtla to $250.27 for Pima. 



In thinning tests with Egyptian cotton the highest yield of Pima, 1,661 lb& 

 of seed cotton per acre, was obtained from one thinning to a distance of from 

 17 to 19 In. between plants, and the highest yield of Yuma, 1,732 lbs., from plants 

 thinned twice to a distance of from 9 to 11 In. between plants. Similar tests 

 made with Durango, Acala, and Tuxtla resulted In increased yields for all 

 varieties from delayed final thinning and a relatively close spacing of plants In 

 the row as compared with only one thinning at an earlier date and a greater 

 distance between plants. Egyptian cotton produced slightly better results when 

 grown by the furrow-and-bed method than by the ordinary method of planting. 

 The highest yield of Pima was obtained from plats having the pairs of rows 

 spaced 6 ft. apart between the centers of the furrows, although the increase in 

 yield was not deemed sufficient to justify the extra difficulty in handling 

 the crop as compared to plantings with the furrows 7 to 8 ft. apart. The best 

 results were also obtained with the plants thinned to from 12 to 10 in. apart. 

 The highest yield of Durango cotton was secured from plats with the furrows 8 

 ft. apart. 



Variety tests with alfalfa resulted In yields of field-cured hay of 3.12 tons per 

 acre for hairy-leaved Peruvian, 2.30 tons for Indian, 2.25 tons for smooth-leaved 

 Peruvian, and 2.22 tons for common Chilean. Y'ields of alfalfa seed were 

 obtained as follows : Arabian, 202 lbs. per acre, Chilean 135 lbs., Peruvian 130 

 lbs., and Grimm 110 lbs. Hairy-leaved Peruvian sown in 20-In. rows produced 

 502 lbs. of seed per acre, as compared with 431 lbs. when sown broadcast Addi- 

 tional hay yields were obtained amounting to 3.78 and 5.35 tons per acre, 

 respectively. 



White durra, Dwarf mllo, Dwarf hegari, and feterlta grown on a field basis 

 in variety tests with grain sorghums produced 36.7, 31.3, 29.8, and 29.5 bu. pel - 

 iure, respectively. Brown kaoliang grown on a limited scale yielded 36.6 bu. of 

 graiu. In spacing tests with Dwarf mllo the maximum yields were obtained 

 where the plants were spaced 12 in. apart in the row, amounting to 36.2 bu. on 

 medium heavy soil and 32.2 bu. on light soil. From 94.2 to 98.7 per cent of the 

 heads were well filled on the medium soil and from 85.8 to 90.8 per cent on the 

 light soil. 



Date-of-seeding tests were made with flax sown In 30-In. rows at intervals of 

 15 days from November 25 to February 1, inclusive. The highest yield, 26.1 bu. 

 per acre, was obtained from the December 15 plnnting, with the January' 2 

 planting next In order with 24.5 bu. Rate-of-seedlng tests, In which flax was 

 sown broadcast at a rate of from 18 to 60 lbs. per acre, resulted In yields ranging 

 from 8.98 bu. for the 18 lb. rate to 10.9 bu. for the 40 lb. rate, although 25 lbs. 

 of seed is deemed sufficient. 



