无缘无故
发表于 2025-3-21 16:09:32
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字的误用
发表于 2025-3-21 21:04:18
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delusion
发表于 2025-3-22 01:24:01
The Chemical Properties of Soil,the chemical properties. In this chapter we shall deal first with a type of surface action which has a great part to play in regulating the fertility of the soil, particularly as regards the retention of soil nutrients and the related property of soil reaction, that is, its condition of acidity or a
创造性
发表于 2025-3-22 05:20:23
The Chemical Properties of Soil,st it means a whole range of products between the raw material and humus proper. It will be convenient therefore to say something first of all about the processes that bring about this decomposition, particularly as recent work indicates that the by-products and intermediate products play an importa
ADAGE
发表于 2025-3-22 10:43:39
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STALE
发表于 2025-3-22 13:29:03
Green Manuring and Composting,ganic matter affect soil tilth and structure, regulate water relations and improve the base exchange capacity of soils. In addition, organic matter contributes nitrogen compounds and the many and varied mineral elements without which plants will not grow. In this chapter we shall deal in some detail
STALE
发表于 2025-3-22 17:21:19
Cultivation,ate it.” Simple as the answer may sound, it is highly deceptive. One might equally say “Why do we eat?” and answer “To live.” In both cases the question and answer skip from start to finish and leave out all the middle.
FELON
发表于 2025-3-23 00:38:51
Soil Erosion and Drainage,ch, and capable of bearing crops for an almost indefinite time. This view is commonly held but is for the most part entirely illusory. Closer consideration shows why this is so. Conditions of temperature and rainfall are such that rapid growth is possible, given other suitable circumstances, and thi
NOT
发表于 2025-3-23 04:19:48
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Adrenal-Glands
发表于 2025-3-23 09:26:56
Fertilisers and Their Use,anurial side of husbandry. Even what is called artificial manuring is not as new-fangled as might be thought. The diarist John Evelyn speaks of the use of blood, hair, feathers, fish and malt residues as being used for crop improvement in the middle of the seventeenth century and other writers at th