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<br />. <br /> <br />. <br /> <br />, <br /> <br />3. Leaching <br />4. '.ater-table conditions will be made <br />(1) Irrigation - <br />a. The plots were flooded with approximately 4 A.-in. of <br />irrigation water in November, 1956. <br />b. An approximate 4 A.-in. irrigation will be made as early <br />as is feasible in the spring. Surface irrigation will be <br />applied thereafter as is necessary to maintain the stands <br />of grass. <br />c. Sub irrigation ~1ill be practiced to maintain the water- <br />table level at 22 inches, if possible. <br />(2) Fertilizer - <br />All plots will receive an application of 50 Ib./A. of N <br />fertilizer. <br /> <br />C. Yield Results: <br /> <br />A portion of each plot will be harvested and yield deter- <br />minations will be made. <br /> <br />D. Statistical Analysis: <br /> <br />Ana4rsis will be made for the 10 replicated grass varieties. <br /> <br />IX. Experiment VI - Alfalfa Variety Nursery: <br /> <br />A. Objectives: <br /> <br />To determine the adaptability, stanis, and yields of several <br />alfalfa varieties on ~claimed saline-sodium soils. <br /> <br />B. General Procedure: <br /> <br />1. Land preparation - The variety trial will be planted on a <br />strip which was surface plowed in 1956. <br />2. Amendments - Gypsum at the rate of 1 T./A. was added in 1956. <br />3. Leaching - The strip was leached with 24 A.-in. of water in <br />1956. An additional 4 A.-in. of water will be applied in 1957 <br />prior to seeding for additional leaching and to facilitate <br />seedling emergence. <br />4. Fertilizer - Phosphorus fertilizer at the rate of JOO lb. <br />P20s/A. will be broadcast and disked into the surface prior <br />to seeding the plots. <br />5. Seeding - Each plot will be seeded at the rate of 8 Ib./A. <br />for each variety in rows s1)aced 1 foot apart. <br />6. 1.ater-table conditions - The location of the variety trial <br />will be within a subirrigated area. The water-table level <br />will be maintained at 22 inches, if possible. <br />7. Surface irrigation - The plots ~lill be irrigated as often as <br />is necessary to establish and maintain a uniform stand. <br />8. Statistical design - The varieties will be arranged in a <br />randomized block design, replicated 4 times. <br /> <br />- 7 - <br /> <br />r .~ i~ ';' ,..':) <br />,-J.., "....,..,., 'I. <br />