50 



Journal of Agricultural Research 



Vol. m. No. I 



ment of the wheat varieties. The relative water requirement on this 

 basis is given in the last column of Table XXIX. 



The quantity of water required by the various crops for the production 

 of a unit amount of seed or grain at Akron in 191 2 is summarized in 

 Table XXIV. Rye is seen to be the least efficient of the grain-producing 

 crops tested, with Voronezh proso the most efficient. 



Table XXIX. — Summary of iiaUr-requirement lyieasurcnunts at Akron, Colo., in igi2 

 WATER REQUIREMENT BASED ON DRY MATTER PRODUCED 



Crop and variety. 



Botanical name. 



Water requirement ol— 



Variety. 



Relative, 

 compared 



with 



Kubanka 



wheat. 



Crop (or genus). 



Relative, 



compared 



with 



wheat 



(Trttiatm 



spp.). 



I912. 



Alfalfa: 



Grimm, S. 



25695- 

 Grimm, A. D 



E. 23-20-52. 



Clover, sweet 



Rice, Honduras. . 



Chick-pea 



Rye .spring 



Cotton, Triumph. . 



P. I. 



Native plants 



Oats: 



Sixty-Day 



Burt 



Swedish Select. .. 



Canadian 



Barley: 



Hannchen 



White HuU-less.. 



Beldi 



Beardless 



Wheat: 



Spring Ghirka . . . 



Marvel Bluestem. 



Emraer 



Kubanka 



Kharkov 



Turkey 



Sugar beet : 



Kleinwanzleben . 

 Com: 



China Wliite 



Iowa Silvermine. 



Laguna 



China White XLa- 

 guna. 



Hopi 



Northwest em 

 Dent. 



China WhiteXEs- 

 peranza. 



Esperanza 



Medicago sativa . 



do.. 



Melilotus alba 



Oryza sativa 



Cicer arietinum ... 



Secale cereale 



Gossypium hirsu- 



tum. 

 /Artemisia frigida . . 

 \Grindelia squarrosa 



Avena sativa . 



....do 



....do 



....do 



Hordeum distichon 

 Hordeum vulgare . , 



....do 



....do 



Triticum aestivum. 



....do..... 



Triticum dicoccum 

 Triticum durum. . . 

 Triticum aestivum . 

 ....do 



Beta vulgaris . 



Zea mays. 

 ....do.... 

 ....do.... 

 ....do.... 



.do. 

 .do. 



.do. 



.do. 



659±6 



657±ii 



638 ±4 

 5i9±i3 

 Sio±i4 

 496 ±9 

 488±i4 



474±i4 

 468±i8 



491 ±13 

 449 ±3 

 423±5 

 399 ±6 



443 ±3 

 439 ± I 

 4i6±4 

 403 ±8 



4S7±3 

 45i±4 

 428 ±3 



394 ±7 

 365±6 

 364±6 



32i±8 



3i5±7 

 302 ± 7 

 295±6 

 289±4 



285±7 



28o±IO 

 250±2 



239±3 



67 ±0. o, 



67 ± .04 



62 ± 



32± 



29 ± 



26± 

 24± 



20± . 04 



i9± .05 



. I2± .02 

 . II± .02 



. o6± .02 



. 02± .03 



. i6ih . 02 

 . I4± . 02 

 . 09± .02 

 . 00 



■ 93± -02 

 . 92 ± .02 



.8i± .03 



. 8o± .02 

 . 77± .02 



■ 75 ± -02 

 . 73± .02 



. 72± .02 

 . 7i± .03 



.63± .01 



. 6i± .01 



638 



638 



519 

 510 

 496 



471 



441 



425 



410 



286 



I. 60 



1.56 



1.27 



24 



21 



19 



I- 15 



1.08 



I. 04 



78 



70 



