Download or read book Effect of Soil Salinity Fertilization Water Table Depth and Runoff Control on Production of Nonirrigated Grain Sorghum in the Lower Rio Grande Valley written by Leon Lyles and published by . This book was released on 1965 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The results of a 3-year study show no statistically significant differences in grain yields among six fertilizer treatment of nonirrigated grain sorghum. Apparently nutrient reserves are adequate for maximum production under existing soil salinity and rainfall conditions. Grain sorghum yields were related to the underground water table depth at seeding to fallow season rainfall and to the soluble salt concentration in the 0- to 3-foot soil depth. Water table depths of 3.35, 5,20 and 7.65 feet at seeding in 1961, 1962 and 1963, respectively, were associated with average grain yields of 3,627, 2,672 and 1,556 pounds per acre. It was determined that a 1-mmbo-per-centimeter increase in soil salinity at the 2- to 3-foot depth resulted in an average decrease of 180 pounds of grain per acre within the -5- to 11-mmhos-per-centimeter range of salt levels exhibited by the test site. Runoff control did not significantly affect yields any year. Absence of timely runoff, high evaptranspiration between crop season, and a high water table that equalizes soil moisture storage apparently explains tha lack of yield response to runoff control.