In the field experiment, the soil hydro-physical indicators (moisture, soil water reserve, soil total porosity and bulk density) and some plant morphological parameters (height, grains per cob, pods per plant, chlorophyll content) were studied, for maize and soybean crops.
The ARe0K, K0, KX and −∆G had significant positive correlations with pH, CEC, available and reserves soil K+, while there were inverse relationships between PBCK and these soil parameters.
As he drove away from his rock-hard alfalfa fields, which yielded only a fourth of their usual harvest this spring, he passed Conservation Reserve Program pastures, held in reserve for soil conservation and wildlife.
Prior studies suggest that levels of radon in ambient air are low; our finding merits further study because the Marcellus shale is known to contain elevated levels of uranium (U.S. EPA 2008), and flowback water and reserve pit soil can contain elevated levels of radium, which could create an environmental exposure pathway (Rich and Crosby 2013; Rowan et al. 2011; Warner et al. 2012).
Forty per cent of the Africans live in hopelessly overcrowded and, in some cases, drought-stricken reserves, where soil erosion and the overworking of the soil makes it impossible for them to live properly off the land.
Conscious of the great drain on the resources of the country and suffering from the increasing ill effects of pollution, the United States began attempts to conserve its reserves of soil, water, fuels, and minerals and to replant forests or otherwise manage them for efficient regrowth.
The most effective measure would be to strengthen the working face by applying rock blots and shotcrete, or reserving core soil at the working face.
This can be assured by controlling the step advance, strengthening support, reserving core soil to support the working face, and preventing the working face from collapsing.
This implies that the sole N reserves in soil with lower N rate of application could have been sufficient for maximum shoot biomass production of common bean at R3 stage.
From this study, it can be concluded that providing quick strong initial support and reserving core soil at the working face are extremely important to control the rock deformation and keep the tunnel stable.
It was found that among them, reserving core soil at the working face and applying immediate initial support to the rock after excavation were most effective to control the rock deformation.
