Phosphorus (P) loss in overland flow varies with spatial distribution of soil P, management, and hydrological pathways. The effect of flow time, flowpath length, and manure position on P loss in overland flow from two central Pennsylvania soils packed in boxes of varying length (0.5, 1.0, 1.5, 2.75, and 4.0 m long x 15 cm wide x 5 cm deep) were examined by collecting flow samples at 5-min inter...

Colonization of the spermosphere and rhizosphere by plant-beneficial bacteria is limited by competition with indigenous soil microbes for resources such as reduced carbon compounds. A study of the soil microbial community around germinating seeds was undertaken as a necessary first step in understanding the competition between the introduced plant-beneficial bacteria and the indigenous microbia...

The paper presents the materials of field research on study regularities development moisture outlines light soils during drip irrigation vegetable crops. correlation is found between depth moistened layer and area moistening pre-irrigation threshold content active soil layer, standards flow rate drippers, which gives an opportunity to decline unproductive water consumption for filtration. It t...

A combination of a simple and universal crop growth simulator (SUCROS) of van Keulen et al. [van Keulen, H., Penning de Vries, F.W.T., Drees, E.M., 1982. A summary model for crop growth. In: Penning de Vries, F.W.T., Laar van, H.H. (Eds.), Simulation of Plant Growth and Crop Production. Simulation Monographs, Pudoc, Wageningen] with a water balance model (WBM) of Arora et al. [Arora, V.K., Prih...

A pot study was used to examine the effects of amendments such as EDTA and elemental sulfur on the growth potential, gas exchange features, uptake and mobilization of Pb by wheat (Triticum aestivum L.) in two texturally different contaminated soils at three levels of EDTA (2, 4, 8 mmol kg(-1) dry soil) and two levels of elemental sulfur (100, 200 mmol kg(-1) dry soil). EDTA resulted in more sol...

Colonization of soybean roots by the biocontrol fungus Verticillium lecanii was studied in vitro and in situ. For in vitro experiments, V. lecanii was applied to soybean root tip explant cultures. Four weeks after inoculation, the fungus grew externally on at least half of the roots (all treatments combined), colonizing 31% to 71% of root length (treatment means). However, when a potato dextros...

Although nutrient-rich manure biochars are expected to be an effective heavy metal stabilizer in agricultural and contaminated soils, systematic studies are lacking to predict the influence of manure variety and pyrolysis temperature on metal-binding potentials. In this study, biochars produced from five manure varieties (dairy, paved feedlot, swine solids, poultry litter, and turkey litter) at...

It has been hypothesized that as soil fertility increases, the amount of carbon allocated to below-ground production (fine roots) should decrease. To evaluate this hypothesis, we measured the standing crop fine root mass and the production of fine roots (<2 mm) by two methods: (1) ingrowth cores and, (2) sequential soil coring, during 2.2 years in two lowland forests growing on different soils ...

Increasingly severe hydrological extremes are predicted for the Pannonian Basin as one of consequences climate change. The challenges extreme droughts require adaptation agriculture especially during intense growth phase crops. For dryland farming, selections optimal land use type and sustainable agricultural management potential tools facing posed by increased aridity. To this end, it is indis...