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Differential susceptibility to chromatid breaks induced by bleomycin in sub-fertile and fertile bovines
(Elsevier B.V., 2004-11-01)
The rate of chromatid breaks was studied in cows with a history of sub-fertility by means of a test based on measurement of the average of breaks induced in lymphocytes of peripheral blood cultures. Fourteen female specimens ...
Carbon fractions and stock in response to solid and fluid organomineral fertilizers in highly fertile soils
(Empresa Brasil Pesq Agropec, 2019-01-01)
The objective of this work was to evaluate the effect of the application of organomineral and mineral fertilizers to highly fertile soils on the carbon management index (CMI) and carbon fractions and stock. The experiment ...
Mechanized and individualized application of N-P-K in combined operations in sugarcane
(2017-01-01)
A new concept of fertilizer machine is under development and shows as differential individually fertilizer application, that is sources of N, P and K are applied separately for the purpose of improving the distribution ...
Mineral nutrition and fertilization of sweet potatoNutrição mineral e adubação da batata-doce
(2020-01-01)
Sweet potato (Ipomoea batatas L.) is a versatile crop, but it is often grown in marginal and low-fertility areas, which reflects storage root yields far below its potential. For this reason, balanced liming and fertilization ...
Atributos químicos do solo sob plantio direto afetado por sistemas de culturas e fontes de adubação
(2011-10-01)
Crop systems and fertilization sources can affect the chemical properties of the soil and, consequently, its fertility. With the aim of evaluating the effect of such management practices, soil samples collected at 0.0-0.10; ...
Mortalidade, crescimento e solução do solo em eucalipto com aplicação de fertilizante de liberação lenta
(2015-07-01)
Fertilization is one of the most effective ways to increase crop productivity, and the use of slow release fertilizers could be advantageous, allowing the assimilation of nutrients as the plants grow. The objective was ...
Fertilization of high-yield corn with poultry litter based on nitrogen doses
(Empresa Brasil Pesq Agropec, 2018-03-01)
The objective of this work was to recommend nitrogen doses from poultry litter-based organic fertilizers in powder and pellet forms, compared with mineral fertilizer, in a high-yield corn crop under notillage. The treatments ...
Fertigation and gradual release of fertilizers for planting of sports turfgrassFertirrigação e fertilizantes de liberação gradual para a implantação de gramado esportivo
(2020-01-01)
Sports turfgrass requires care to show good development and playability. The type of fertilizer and the way of application of this fertilizer directly interfere with its quality. The objective of the present work was to ...
Modelling Diffusion Effects in Fertility Transition
(1993)
Mathematical models bind theory to precise formulations, and by doing so accentuate logical inconsistences in theories and facilitate their testing. In this article we explore the implications of simple mathematical models ...
Soil fertility and agriculture yield with the application of organomineral or mineral fertilizers in solid and fluid forms
(Empresa Brasil Pesq Agropec, 2018-05-01)
The objective of this work was to evaluate the effects of organomineral and mineral fertilizers, in their solid and fluid forms, on soils with variable charges with high fertility built up from nitrogen, phosphorus, and ...