September 1970

Cover: "Rusty rib" visible on Climax variety of head lettuce (A) above left - after seven days of storag at 35* F - contrasts sharply with resistant varieties: Forty-Niner (B) above right, Golden State D (C) below left, and Vanguard (D) below right - all showing no symptoms. Use of resistant varieties appears to be the only way to avoid this disorder, as well as "internal rib necrosis," both of which were serious problems for Imperial Valley lettuce growers during the last two winter seasons.

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California Agriculture, September 1970

Volume 24, Number 9

research articles

Reclamation of a Coachella Valley grape ranch by changes in levelling, irrigation, and water source
by D. D. Halsey , J. R. Spencer , D. Mulder
pp4-6, doi#10.3733/ca.v024n09p4
Summary | Expanded Abstract | PDF

Construction and placement of observation wells is critical in evaluation of tile drain lines
by Dean D. Halsey
pp6-7, doi#10.3733/ca.v024n09p6
Summary | Expanded Abstract | PDF

Internal rib necrosis head lettuce in Imperial Valley
by Hunter Johnson , D. R. Woodruff , T. W. Whitaker
pp8-10, doi#10.3733/ca.v024n09p8
Summary | Expanded Abstract | PDF

Feedlot performance… steers vs. heifers
by Reuben Albaugh , W. N. Garrett
pp10-11, doi#10.3733/ca.v024n09p10
Summary | Expanded Abstract | PDF

Antioxidants reduce grape yield reductions from photochemical smog
by C. R. Thompson , Gerrit Kats
pp12-13, doi#10.3733/ca.v024n09p12
Summary | Expanded Abstract | PDF

Rice straw utilization by livestock
by W. J. Clawson , W. N. Garrett
pp13-14, doi#10.3733/ca.v024n09p13
Summary | Expanded Abstract | PDF

Streptomycin control of pear fireblight in California in —1968 and 1969 field tests
by J. Blair Bailey , Gordon W. Morehead
pp14-15, doi#10.3733/ca.v024n09p14
Summary | Expanded Abstract | PDF

editorial, news, letters & science briefs

EDITORIAL: What's the purpose of an agricultural experiment station?
by C. F. Kelly
pp2, doi#10.3733/ca.v024n09p2
PDF

General Information

Pesticide residues in fruit harvesting
Editors
pp3, doi#10.3733/ca.v024n09p3
PDF