CAB
发表于 2025-3-26 23:44:49
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一条卷发
发表于 2025-3-27 01:44:43
Book 1998Scherr (1995) estimate that these tropical hillside areas are inhabited by 500 million people, or one-tenth of the current world population, many of whom practice subsistence agriculture. The region most affected is Asia which has the lowest area of arable land per capita. Aside from limited areas o
Apoptosis
发表于 2025-3-27 05:47:59
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otic-capsule
发表于 2025-3-27 12:06:20
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积极词汇
发表于 2025-3-27 15:56:12
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预知
发表于 2025-3-27 21:51:26
978-90-481-5025-0Springer Science+Business Media Dordrecht 1998
nuclear-tests
发表于 2025-3-28 00:13:23
https://doi.org/10.1007/978-3-8349-4357-6and intensity of interactions between the components. The net effect of these interactions is often determined by the influence of the tree component on the other component(s) and/or on the overall system, and is expressed in terms of such quantifiable responses as soil fertility changes, microclima
一大群
发表于 2025-3-28 03:57:50
https://doi.org/10.1007/978-3-322-86258-7 through (1) input of N by biological N. fixation, (2) retrieval of nutrients from below the rooting zone of crops and (3) reduction in nutrient losses from processes such as leaching and erosion. Trees can increase the availability of nutrients through increased release of nutrients from soil organ
AGATE
发表于 2025-3-28 07:41:12
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Needlework
发表于 2025-3-28 11:42:52
https://doi.org/10.1007/978-3-322-86258-7rowing trees are mostly grown in monocultures. However, questions are now being raised about the long-term sustainability of their growth as well as their effects on site quality. Losses of N and P from the site through biomass harvest and during site preparation constitute a major nutrient drain. A