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materials to maintain or improve soil organic matter content in a manner that does not contribute to contamination of crops, soil, or water by plant nutrients, pathogenic organisms, heavy metals, or residues of prohibited substances” ( United States

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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

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Abbreviations: A, apparent net photosynthesis; Berryland, Berryland sand soil high in organic matter; CYV, canopy volume; DMP, dry-matter production; E, transpiration; g L , leaf conductance of water; Galestown, Galestown sandy clay loam soil; IC

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growth in water-limited regions and organic matter–degraded soils. Materials and Methods Growth environment, soil, and irrigation treatments. Field studies were conducted at the Texas A&M AgriLife Research and Extension Center in Uvalde, TX (lat. 29.21°N

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objective of this study was to evaluate several production practices (cultivar, weed management, training time, and irrigation) for their effect on the nutrient status of primocane and fruiting lateral leaves, and fruit as well as on soil pH, organic matter

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biomass and activity, increased soil organic matter, increased nutrient pools, and other soil properties ( Delate et al., 2003 ; Klonsky, 2000 ). A study comparing compost with or without cover crops and tillage on organic vs. conventional sweetpotato

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by many organic blueberry growers to increase soil organic matter content and provide additional nutrients. Depending on the feedstock, compost supplies 3% to 10% of the total N during decomposition for several years after application ( Gale et al

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chemical properties are improved by organic amendments through their contribution to soil cation exchange capacity, enhancing the ability of soils to buffer pH changes, and cation complexation ( Magdoff, 1992 ; Wallace et al., 1990 ). Soil organic matter

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soil requirements for satisfactory growth; this is reflected in the establishment and maintenance costs. Blueberry cultivation is limited to acidic soils, usually with high organic matter, where iron is readily available and ammonium (NH 4 + ) is the

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Organic production has become a significant sector of the vegetable industry in California. Providing sufficient soil nitrogen availability to reach maximum yield potential can be a challenge in organic culture. Cover cropping is generally the most

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