• Studies on Fall Production Problems with Irish Potatoes in Arizona

      Bessey, Paul M. (College of Agriculture, University of Arizona (Tucson, AZ), 1965-08)
    • Effects of Treatments on the Postharvest Senescence of Green Leaves

      Bessey, Paul M. (College of Agriculture, University of Arizona (Tucson, AZ), 1965-08)
    • Cantaloup Harvest Aids

      Larsen, W. E. (College of Agriculture, University of Arizona (Tucson, AZ), 1965-08)
    • Labor Requirements for Vegetable Crops in Arizona

      Pawson, Walter (College of Agriculture, University of Arizona (Tucson, AZ), 1965-08)
    • Economic Feasibility of Cantaloup Production in Navajo County, Arizona

      Underwood, Amos; Farrish, Raymond (College of Agriculture, University of Arizona (Tucson, AZ), 1965-08)
    • Fertilizer Placement in Potato Production

      Pew, W. D.; Park, J. H. (College of Agriculture, University of Arizona (Tucson, AZ), 1965-08)
      The importance of proper fertilizer placement has been demonstrated in recent greenhouse studies. Small, seemingly unimportant changes in fertilizer placement often in reality are very important. Specially constructed boxes with glass fronts were used to study root development as affected by fertilizer placement. Yields were significantly different one from another with the poorer ones resulting where fertilizers were placed too close to the seed piece. Yields ranging from 298 cwt, where the fertilizer was placed two inches to each side and level with the seed piece; up to 367 cwt where the fertilizer was placed four inches to each side and two inches below the seed piece. Root burning and speed of root regeneration represent the most important consideration to be reckoned within the proper placement of fertilizer.
    • Vegetable Growers Association Memorial Scholarships

      Fazio, Steve (College of Agriculture, University of Arizona (Tucson, AZ), 1965-08)
    • Effect of Fertilizers on Yield, Quality and Nutrient Uptake by Lettuce

      Strohlein, J. L.; Tucker, T. C. (College of Agriculture, University of Arizona (Tucson, AZ), 1965-08)
      A series of studies on lettuce fertilization have been carried out over the past few years. Fertilizer applications increased yield through increased head size and did not affect the number or quality of harvested heads. The lower rates used were as effective as the higher rates. Nitrogen and phosphorus fertilization generally increased the nitrate and phosphorus content of the various plant parts selected for analysis.
    • Influence of Seed Piece Size on Potato Yields

      Pew, W. D.; Park, J. H. (College of Agriculture, University of Arizona (Tucson, AZ), 1965-08)
      During the past several years considerable experimenting has been aimed at developing methods for improving potato yields. One of the easiest and most effective ways found was to adjust the seed piece size and number of eyes per piece. Seed pieces were cut to meet the following size categories: 1/2, 1, 1-1/2, and 2 ounces and small whole tubers; 1-1/2, 2 and 2-3 ounces. Significant differences in yield were obtained between the various seed piece size treatments. The yield advantage was in favor of the larger size. The number of eyes per piece was less important except with the smallest size. In this case the seed pieces were incapable of adequately supplying plant growth from more than one eye. Small, whole tubers from good high yielding fields were found to be excellent for seed potato pieces.
    • Arizona Potato Variety Trials, 1961-1964

      Oebker, N. F.; Bessey, P. M. (College of Agriculture, University of Arizona (Tucson, AZ), 1965-08)
      In potato variety trials in Central Arizona, Kennebec and Merrimack performed the best as potatoes for chipping. Red varieties Viking, LaRouge, and Red LaSoda yielded about the same as Red Pontiac, the standard for the area; however, Viking had much better appearance and uniformity than the other three reds.
    • Sclerotiniose or Drop of Lettuce

      Stone, William J. H. (College of Agriculture, University of Arizona (Tucson, AZ), 1965-08)
      Preliminary tests have been initiated in a program for control of Sclerotiniose, or drop of lettuce. Damping-off problems are concurrently being investigated.
    • Potato Soft-Rot Diseases

      Stone, William J. H. (College of Agriculture, University of Arizona (Tucson, AZ), 1965-08)
      Investigations on the problem of black-leg and tuber rots have revealed an interaction between two pathogenic organisms, a bacterial species and Pythium aphanidermatum.
    • Irrigation Practices with Potatoes

      Pew, W. D.; Park, J. H. (College of Agriculture, University of Arizona (Tucson, AZ), 1965-08)
      Data from five years of experimentation with irrigation and soil moisture levels indicate that a certain knowledge and general understanding of these factors is important in potato production. Nine treatments ranging from a constant very wet level to a constant dry treatment were used. Yield differences were significant and varied from a low of 321 cwt, from plants exposed to a very wet (18-20 centibars tension) level early in the season followed by a dry (75-80 centibars tension) condition during the last part of the growing season, to 416 cwt where the plants were kept at a dry level early and changed to a very wet level late in the season. Growers often unknowingly reduce yields and lower quality by applying excessive amounts of irrigation water.
    • Fertilizer Studies with Potatoes in the Queen Creek Area

      Turner, Fred Jr.; Pew, W. D. (College of Agriculture, University of Arizona (Tucson, AZ), 1965-08)
      In a fertilizer study in the Queen Creek area, a strong response to nitrogen and phosphorus fertilizers was obtained. Potatoes did not respond to potassium when applied with nitrogen and phosphorus.
    • Potato Fertilization

      Pew, W. D.; Park, J. H. (College of Agriculture, University of Arizona (Tucson, AZ), 1965-08)
      Results from experiments with varying levels of nitrogen, phosphorus and potassium have shown that the ratios of 1 - 2.5 - 0 to 1 - 3 - 0 produce the highest yields. While the ratio between nitrogen and phosphorus appears important, the water solubility of the phosphorus seems to be the most important factor in proper fertilization. Proper placement of the fertilizer as well as irrigation and other cultural practices are musts in potato production.
    • Effects of Magnesium, Nitrogen, and Micronutrients on the Yield and Incidence of Crown Blight of Cantaloups in Yuma Area

      Turner, Fred Jr.; Grounds, R. E. (College of Agriculture, University of Arizona (Tucson, AZ), 1965-08)
      Yield differences resulting from magnesium, nitrogen, and micronutrients application were small. The incidence of crown blight was spotty and not related to fertilizer treatment.
    • Bacterial Soft-Rot of Vegetables

      Stone, William J. H. (College of Agriculture, University of Arizona (Tucson, AZ), 1965-08)
      A highly virulent bacterial isolate was obtained from Arizona vegetables. Pathogenicity and physiological studies were made in an effort to correctly identify the isolate.
    • Economic Feasibility of Chili Production in Northern Arizona

      Farrish, Raymond O. P. (College of Agriculture, University of Arizona (Tucson, AZ), 1965-08)
    • Response of Dry Onions to Varying Levels of Soil Moisture

      Pew, W. D. (College of Agriculture, University of Arizona (Tucson, AZ), 1965-08)
      Onions respond favorably to increasing levels of soil moisture as measured by increase in bulb size and total yields. Maintaining a soil moisture level of 18-20 centibars of tension (nearly field-holding capacity) produces the greatest yields of bulbs. However, dry onions so produced are somewhat softer in texture, tended toward thick -neck growth, matured slower, and are more difficult to cure adequately in the normal length of time. Onions grown on lesser amounts of water tend to have the reverse characteristics. Costs of production are similarly increased under high soil moisture levels because of the need for replacing nitrogen leached out of the root zone. Also, the costs of the water and its application must be increased. Therefore, the economics involved would be a required consideration.
    • Yuma Sweet Corn Variety Trials

      Oebker, N. F.; Grounds, R. E. (College of Agriculture, University of Arizona (Tucson, AZ), 1965-08)
      Eighteen sweet corn hybrids were compared in the Yuma Valley in the spring of 1961. Golden Cross Bantam, especially the 51-T strain, gave the best overall performance.