نتایج جستجو برای: continuous cropping

تعداد نتایج: 270193  

Journal: :Journal of nematology 1973
J M Good W S Murphy B B Brodie

During a 6-year study of 1-, 2-, and 3-year crop rotations, population densities of Pratylenchus brachyurus, Trichodorus christiei, and Meloidogyne incognita were significantly affected by the choice of crops but not by length of crop rotation. The density of P. brachyurus and T. christiei increased rapidly on milo (Sorghum vulgate). In addition, populations of P. brachyurus increased significa...

2003
JunJie Wu P. G. Lakshminarayan Bruce A. Babcock

An empirical model is developed to estimate the effects of alternative farming practices on potential nitrogen runoff and leaching in 128,591 National Resources Inventory sites across the Midwest and the Northern Plains of the United States. This model integrates the effects of soils, climate, crops, and management practices on nitrogen loss. The model is applied to evaluation of two policy sce...

2006
Anil Sood Sushma Panigrahy

With the availability of required inputs for intensive agriculture, the cropping system in Punjab state has undergone a paradigm shift, from a much diversified cropping pattern to a very specialized monocropped one. A study was undertaken in Bathinda district of Punjab State for mapping crop area, cropping pattern and finally long term changes in cropping pattern. Multi-year, multi-date, IRS LI...

2017
Richard Kyalo Elfatih M. Abdel-Rahman Sevgan Subramanian Johnson O. Nyasani Michael Thiel Hosein Jozani Christian Borgemeister Tobias Landmann

Cropping systems information on explicit scales is an important but rarely available variable in many crops modeling routines and of utmost importance for understanding pests and disease propagation mechanisms in agro-ecological landscapes. In this study, high spatial and temporal resolution RapidEye bio-temporal data were utilized within a novel 2-step hierarchical random forest (RF) classific...

2016
Rabi Narayan Behera Debendra Kumar Nayak Peter Andersen Inger Elisabeth Måren

Human population growth in the developing world drives land-use changes, impacting food security. In India, the dramatic change in demographic dynamics over the past century has reduced traditional agricultural land-use through increasing commercialization. Here, we analyze the magnitude and implications for the farming system by the introduction of cash-cropping, replacing the traditional slas...

2013
Y Liang X Lin S Yamada M Inoue K Inosako

Soil degradation has been a very serious problem for sustainable production, especially by a re-cropping of greenhouse-cultivated cucumber (Cucumis statirus L.). The aim of this research was to expound the actuality for soil degradation, at the same time, put forward some suggestion for preventing from soil degradation and maintain sustainable production in greenhouse basic on the two experimen...

2002
D. W. Dickson R. N. Gallaher

Hairy vetch (Vicia sativa L.) succeeded by corn (Zea mays L.)or grain sorghum (Sorghumbicolor L. Moench) were seeded insplit plots randomized within whole plots of no-tillage versus conventional tillage over four growing seasons (1980-83). The vetch-corn cropping system increased the density of Meloidogyne incognita 2.9 X more than the vetch-grain sorghum cropping system. I n contrast, the vetc...

2017
H. J. Lin

Steganography is the art and science of hiding or embedding data in a transmission medium. The goal of steganography is to hide an information message inside a harmless cover medium in such a way that it is not possible even to detect that there is a secret message. In this paper, the object oriented steganography is based on biometrics. Data is embedded into some regions of the skin and not to...

2008

The environmental impact of agriculture cannot be ignored. In many countries, as much as 70 per cent of the land area is in agricultural use. Over a third of the global agricultural land area is in high-intensity, continuous cropping systems that use high levels of agrochemicals and reshape land and waterways. The rest is under such a farming system that uses far fewer inputs, but requires rela...

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