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Evaluation of Calcium Soil Conditioners in an Irrigated Cotton Production System

J.R. Griffin, J.C. Silvertooth and E.R. Norton


In 1996 a single field experiment was conducted at Paloma Ranch, west of Gila Bend in Maricopa County, Arizona. Nucoton 33B was dry planted and watered-up on 15 April. Treatments consisted of various rates and times of application of nitrogen (N) and calcium (Ca) from two sources (N-Cal and CAN -17), as well as a standard N source, UAN-32, along with a Ca check, which received no Ca. Treatments1, 2,and 3 each received a total of 280 lbs. N/acre. Treatment 4 received a total of 210 lbs. N/acre while treatment 5 received a total of 301 lbs. N/acre. Treatment 1 was a standard for reference and received only applications of UAN-32. Treatments 2 and 4 each received a total of 72 lbs. of Ca/acre. Treatment 5 is the same as treatment 2 except that it received a total of 79 lbs. Ca/acre that included a 7 lbs. Ca/acre at water up. Treatment 3 received a total of 300 lbs. Ca/acre. No significant differences were found among the various treatments in terms of plant growth, soil water content, ECe values, and sodium absorption ratios. Lint yields were significantly different (P<0.07).

Reprinted from Proceedings of the 1998 Beltwide Cotton Conferences pp. 645 - 649
©National Cotton Council, Memphis TN

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Document last modified Sunday, Dec 6 1998