Goal. To develop a comparative correlation model of the interconnections ecological-trophic groups soil microorganisms with agrophysical, physicochemical indicators, humus condition, productivity degraded chernozem and to determine energy efficiency use intensive, low-intensive, organic fertilizer systems using by-products crops as fertilizers in 5-field grain-spray crop rotation for conditions...

The soybean cyst nematode (SCN; Heterodera glycines) and brown stem rot (BSR) fungus (Phialophora gregata) are serious pests of soybean, occurring over a range of soil types and soil pH. Often found in the same field, management strategies implemented to control one pathogen may in fact exacerbate damage caused by the other. As soybean acreage has increased, the duration between soybean crops h...

B et te r C ro ps /V ol . 9 9 (2 01 5, N o. 1 ) Abbreviations and notes: N = nitrogen; P = phosphorus; K = potassium; S = sulfur; Cu = copper; Fe = iron; Mn = manganese; Mo = molybdenum; Zn = zinc. Sustainable crop production is essential to a healthy and adequate food supply. At fi rst glance, a healthy crop reveals only the above ground plant; the roots that support the visible plant are seld...

Root-knot nematodes, particularly Meloidogynejavanica (Treub.) Chitwood, 1949 and M. incognita (Kofoid and White) Chitwood, 1949, are among the most important pathogens of carrots (Daucus carota L.) in Brazil. They damage tap roots by galling, digitation, and constriction, resulting in lower market value (3). Even low soil densities of root-knot nematodes have been reported to reduce marketable...

We evaluated the effects of the amount and type of C compounds (labile/recalcitrant) of crop residues on the soil organic matter (SOM) components under no-tillage practices in semiarid region of Argentina, with the aim of establishing criteria for sustainable agriculture. Five agricultural situations were evaluated: soybean/wheat rotation (wheat crop and at bare fallow); soybean monoculture; so...

Despite improvements in the use of soil conservation practices, crop rotation and nutrient management programs, significant concern still exists regarding soil erosion and nutrient losses in runoff from row crop production. In the US, states are required to implement water quality standards based on USEPA guidelines or other scientifically defensible methods (Ice and Binkley, 2003). Agroforestr...

[This corrects the article on p. 181 in vol. 28.].

Sustainable agriculture seeks to at least use nature as the model for designing agricultural systems. Since nature integrates her plants and animals into diverse landscape, a major tenet of sustainable agriculture is efficiency and lack of waste products in nature. When domestication of crops replaced hunting and gathering of food, landscape changed accordingly. By producing a limited selection...

Actinomycetes are involved in important environmental processes such as the decomposition of organic matter. In this study, we examined the impact of crop rotation on the actinomycetes community colonizing rice straw residues in soil over 3 field seasons by means of Denaturing Gradient Gel Electrophoresis (DGGE) fingerprinting analysis of actinomycetes 16S rRNA gene fragments amplified from fie...

The “Old Rotation” experiment was initiated in 1966 at the Agriculture and Agri-Food Canada Research Centre at Swift Current, Saskatchewan. The overall objectives were to evaluate the influence of rotation length, fallow substitute crops, and nitrogen (N) and phosphorus (P) fertilizers on crop yields, grain protein, N and P uptake, moisture conservation, nutrient use efficiency, incidence of di...