Author: R. E. DoerschPublisher:
ISBN:
Category : Corn
Languages : en
Pages : 230
Book Description
Relationships Between Rates of Fertilizer Application, Soil Fertility Levels, Ear Corn Yields and Nutrient Uptake
Author: R. E. DoerschRelationships Between Fertilization and Various Predictors of Yields of Field Corn
Author: Paul J. StangelPublisher:
ISBN:
Category : Corn
Languages : en
Pages : 354
Book Description
Soil Testing and Plant Analysis
Author: Dissertation Abstracts
Author: Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 972
Book Description
Abstracts of dissertations and monographs in microform.
Soil Fertility and Corn and Soybean Yield and Quality in a Six-year Nitrogen and Phosphorus Fertilization Experiment
Author: Peter M. AnthonyPublisher:
ISBN:
Category : Soil fertility
Languages : en
Pages : 450
Book Description
Optimum management of nitrogen (N) and phosphorus (P) fertilizers for corn [Zea mays L.] and soybean [Glycine max (L.) Merr.] production requires quantitative understanding of multiple soil processes and crop responses, including supply and immobilization of N and P by soil, the response of yield and quality to nutrient availability, and the relationships and interactions between N and P cycling, crop response, and other soil physical and chemical variables. We conducted a six-year experiment on two 16-ha fields on glacial-till soils in south-central Minnesota. In each year of a corn-soybean rotation, we measured soil physical and chemical parameters and grain yield and quality at a 0.014-ha resolution within each field. These observations coincided with placement of a randomized complete block, split plot design of N and P fertilizer treatments. Spatial patterns of mineralizable N were consistent over time. Mineralizable N was highly correlated to soil nitrate at a well-drained site, but not at a poorly-drained site. Increases in available soil P per kg of net P addition were significantly related to soil pH. Within fields, spatial patterns of soybean yields were highly correlated across years, and we observed consistent relationships between yield and soil variables. Overall, soybean yield related positively to soil P and Zn and negatively to pH at all site-years. Quadratic-plateau regression models of soybean yield in relation to soil P and Zn indicate that in high pH soils at these sites, yield is optimized when soil P and Zn levels are higher than current recommendations. Corn yields responded significantly to N rate and N rate by P rate interaction in all site-years. Whole-field economic optimum N rate differed significantly by site-year and by P treatment at some site-years. Site-specific P fertilization should account for spatial variation in soil P buffering capacity. Nitrogen mineralization and NxP nutrient interactions should be accounted for in agronomic management decisions for corn production. The consistent influence of soil pH on nutrient cycling and crop response indicates the potential benefit to amelioration of high pH in calcareous glacial-till soils. Results highlight the significance of spatial variability in nutrient cycling to crop management.
Proceedings of the ... Fertilizer, Aglime and Pest Management Conference
Author: Fertilizer Abstracts
Author: Soil-fertilizer-plant Research, 1972-l975
Author: National Fertilizer Development Center (U.S.)Publisher:
ISBN:
Category : Fertilizers
Languages : en
Pages : 52
Book Description
American Doctoral Dissertations
Author: Publisher:
ISBN:
Category : Dissertation abstracts
Languages : en
Pages : 596
Book Description
The Effect of Fertilizer Applications on Yield and Nutrient Composition of the Leaf and Grain of Corn Grown on a Wisner Loam Soil
Author: Tatsuo FujimotoPublisher:
ISBN:
Category : Corn
Languages : en
Pages : 128
Book Description