This item was digitized as part of the Million Books Project led by Carnegie Mellon University and supported by grants from the National Science Foundation (NSF). Cornell University coordinated the participation of land-grant and agricultural libraries in providing historical agricultural information for the digitization project; the University of Arizona Libraries, the College of Agriculture and Life Sciences, and the Office of Arid Lands Studies collaborated in the selection and provision of material for the digitization project. / Revised May 1916.

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The seed vigor of a super-sweet mutant of sweet corn (Sweetie 76) was compared to that of a traditional, non-mutant variety (Jubilee). The inherent seed vigor of a typical super-sweet corn mutant was considerably less than that of a traditional non-mutant variety. Leakage of reducing sugars from sweet corn seeds at a low temperature was not correlated with seed vigor.

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A complete factorial experiment using three nitrogen (44, 106 and 160 lbs N/acre) and three water rates (60, 100 and 130% consumptive use) examined the specific management criteria necessary for obtaining optimum yield and quality of drip -irrigated 'Jubilee' sweet coni. The crop was planted on I March and harvested on 10 June, with an 86 /50°F heat unit accumulation of 1738. When present, a nitrogen deficiency greatly decreased marketable yield, number of marketable ears/plant, mean ear weight, ear length and tip fill. Higher moisture rates generally had less effect on yield and quality than did N rates; however, increasing water rates significantly increased marketable yields and plant height, improved tip fill and lessened the occurrence of blank kernels. The effect of N and water rates on N and dry matter accumulation and on diagnostic plant tissue testing results for sweet corn are also presented. The maximum marketable yield obtained in this experiment was 7.8 tons per acre, using 160 lbs N/acre and 21.1 inches of irrigation water.

A field experiment using subsurface drip irrigation was conducted at the Maricopa Agricultural Center on a Casa Grande sandy loam to evaluate the effect of varying nitrogen rates on the growth and yield of 'Jubilee' sweet corn when applied with, and without the nitrification inhibitor, nitrapyrin (N-Serveᴿ). N treatments of 89, 134 and 2671bs. N/acre were applied as ammonium sulfate to one meter miniplots in three split applications between the V2 and the V10 growth stages. Individual N-Serveᴿ application rates were 0.5 lbs/acre. All solutions were applied through buried, perforated PVC tubing to simulate application through the buried drip irrigation system. The inclusion of N-Serveᴿ significantly increased dry matter accumulation, number of total ears and number of marketable ears /plant at all N levels. Plant tissue analysis suggested that enhanced uptake of ammonium -N as well as reduced leaching of nitrate-N contributed to this growth response to N- Serveᴿ.

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