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Friday, September 21, 2018

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1198. Canode, C.L. and K.H. Klager. 1957. Management of alfalfa for high quality hay on non-irrigated lands in Idaho.. ID Agr. Expt. Sta. Research Bull. #36.
Examined several cutting strategies; best choice was a 2-cut system; cut at first bloom stage; Ladak and Vernal were best varieties under this system.

1863. Ensign, R.D.. 1976. Alfalfa varieties.. ID Agr. Expt. Sta. CIS #318.
Lists varieties for the whole state; source area, characteristics. T: variety adaptability.

2898. Idaho Agr. Expt. Sta.. 1940. Annual Report. ID Agr. Expt. Sta. Bull. #236.
Borax gave yield increase in alfalfa on cut-over land in north Idaho - 50% yield increase in second year from a 40 lb/ac application.

2792. Hulbert, H.W. and F.L. Burkart. 1934. Culture practices for alfalfa in northern Idaho.. .
Suggested varieties - Grimm and Ladak; early spring seeding; 8-11 lb/ac seed, best hay yields when seeded without nurse crop (2.5 T/ac vs. 1.5 T/ac); peas is best nurse crop; clipping not recommended first year; gypsum often boosts yields; cut when basal shoots are 1-2" long, or between 1/10 and 1/4 bloom. T: yields X nurse crop. Seeding date, seeding rate.

2946. Idaho Agr. Expt. Sta.. 1936. Annual Report. Id Agr. Expt. Sta. Bull #220.
W-P-Alf vs. W-P rotations; peas with alfalfa outyielded peas W-P by 28%; plants were 3" taller; screened 10 Alaska varieties. Gypsum still the best fertilizer for alfalfa.

4022. Mahler, R.L.. 1990. Nitrogen database project - final report.. unpublished report for Dryland Cereal/Legume LISA project.
This project had two components: 1) development of a comprehensive database on winter wheat response to nitrogen fertilizer rates; 2) evaluation of the potential of peas, alfalfa, and wheat straw as nitrogen sources for a following wheat crop in rotation. The database study examined winter wheat yield response to 41 nitrogen rates. When soil test N + mineralizable N + fertilizer N ranged from 101 to 175 kg/ha, a requirement of 2.75 lb N per bushel of wheat was calculated. This agrees with the figure calculated by Leggett in the 1950's, indicating that modern varieties have not changed in their basic nitrogen requirement, when nitrogen fertilizer efficiency is assumed to be 50%. At total available N rates greater than 175 kg/ha, the N requirement per bushel of wheat increased dramatically. Low rates did not show a large increase in efficiency on a per bushel basis. At Moscow, N fertilizer application rates less than 95 kg/ha resulted in greater than 50% N use efficiency. Efficiency declined rapidly at rates above this. The green manure study compared alfalfa, pea, and green wheat straw residues applied at 1, 2, and 3 mt/ha. In general, higher rates of pea and alfalfa resulted in higher wheat yields. The highest yields were with the high rate of pea residue. It was more effective than alfalfa residue, probably due to faster decomposition. Alfalfa provided more N per ton of residue (31 kg/mt) than the peas (29 kg/mt), while straw added 19 kg/mt.

4302. McDole, R.E., R.W. Harder, and J.P. Jones. 1978. North daho fertilizer guide - Alfalfa.. ID Agr. Expt. Sta. CIS #447.
Describes crop needs for P,K,S and micronutrients.

5048. Parks, T.H.. 1913. The alfalfa weevil.. U. of Idaho Extension Bull. #7.
The weevil was introduced into Utah from Europe; feeds principally on alfalfa and sweetclover; spreads by wind; damage done by larvae which eat first crop leaves; injure foliage from May to July; one generation per year; spring tooth harrow in early spring and after first cutting; then go over with a brush drag to crush the insects; 31 species of birds feed on the weevil, also ladybugs; cool spring inhibits damage.

7386. Wakeland, C.. 1921. Fighting alfalfa weevil.. U. of Idaho Extension Bulletin # 50.
Spray with calcium arsenate; "effective and safe"; bio-control agent imported in 1912 - ichneumon fly; it stings the larvae and deposits eggs; questionable level of control.

7395. Wakeland, C.. 1925. Seasonal variation as it affects the activity and control of the alfalfa weevil.. ID Agr. Expt. Sta. Bull #138.
Using calcium arsenate on alfalfa; monitoring effect on cows eating the hay.

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