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Effect of Different Levels of Nitrogen and Phosphorus on Yield, Soil Properties, and Nutrients of Corn 1
Author(s) -
Shukla G. C.
Publication year - 1972
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1972.00021962006400020002x
Subject(s) - nutrient , nitrogen , agronomy , phosphorus , soil water , sowing , yield (engineering) , chemistry , crop , growing season , zea mays , crop yield , zoology , environmental science , biology , soil science , materials science , organic chemistry , metallurgy
The effect of five levels of N and three levels of P on yields, soil properties, and uptake of nutrients of corn ( Zea mays L.) was studied at Central Agricultural Station (CAS), Central Horticultural Station (CHS), and Black Bush Polder (BBP) in Guyana. Corn yield showed a significant response up to 180 kg N/ha applied at CAS and CHS. At BBP the yield increase was nonsignificant. P gave a significant effect on yield in one season at CAS only. The changes in soil properties from the time of planting first crop to the harvesting of the second crop at CAS and CHS are described. Application of N had a residual effect on both the soils. The changes in P and K followed different patterns on two soils. After cropping, pH and exchangeable Ca and Mg increased in both the soils. Nitrogen rates significantly increased N and K and decreased P content of the leaves. P levels had a nonsignificant effect on the uptake of nutrients.