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Sven Verlinden, Louis McDonald, James Kotcon, and Silas Childs

, soil potential, soil quality, and soil fertility—more or less defined in the literature—have all been employed to define the long-term carrying capacity of soil and sustainability of agroecosystems ( Idowu et al., 2009 ; Knight et al., 2013 ). Despite

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Rebecca J. Long, Rebecca N. Brown, and José A. Amador

of waste amendment application for crop production have shown variable effects on soil properties, fertility, and crop yield. Although studies of amendment with paper mill sludge have shown no significant increases in soil concentrations of heavy

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Joseph C. Fetter, Rebecca N. Brown, and José A. Amador

fertilizer, the potential for N mineralization increases ( Zuberer, 2005 ), increasing N availability to the turfgrass. Organic fertilizers thus have the potential to increase soil fertility and SOM content over the long term ( Booze-Daniels and Schmidt, 1997

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Neng-Iong Chan, Bruce E. Rittmann, and James Elser

poor results with algal treatments may have occurred because soil ammonium levels were inhibitory. Although the algal fertilizer was ineffective in our short-term growth experiments, the P was retained in the soils, which may improve soil fertility in

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S. Castro Bustamante and T.K. Hartz

application of manure, compost, and organic fertilizers to provide N fertility. The cooperating growers clearly differed in their use of these materials, as suggested both by the management records provided, and by the wide range of soil P availability among

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Mayashree Chinsamy, Manoj G. Kulkarni, and Johannes Van Staden

the soils that translates to certain fertility constraints ( Sanchez et al., 1982 ). According to the soil fertility capability classification, fertility constraints such as low cation exchange capacity (CEC) of soils is characterized by low organic

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Joji Muramoto, Richard F. Smith, Carol Shennan, Karen M. Klonsky, James Leap, Miriam Silva Ruiz, and Stephen R. Gliessman

(≈0.59) were greater than those for site A (≈0.36) indicating that uptake of added fertilizer N was more efficient at B than at A. As discussed later, this may be attributed to lower native soil N fertility at B compared with A. At B in 2007, in

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Dana Jokela and Ajay Nair

irrigated as needed to achieve 1 inch of water per week using drip irrigation with the drip tape placed on the soil surface within broccoli rows. When split fertility subplots were fertigated, preplant only and no-fertilizer subplots were also irrigated to

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Qingren Wang, Waldemar Klassen, Edward A. Evans, Yungcong Li, and Merlyn Codallo

bedrocks with low soil fertility. The nutrients in these soils are prone to leaching through the coarse-textured soil profiles by heavy rainfall events that occur mainly during the rainy summer season. On average, more than 1000 mm of rain happens between

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Fengyun Zhao, Yu Jiang, Xiufeng He, Huaifeng Liu, and Kun Yu

and low organic matter content in most of the orchards in Xinjiang, the drawbacks of drip fertilization have gradually emerged over the years. Problems such as soil compaction, fertility decline, secondary salinization, environmental pollution