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Author: W. B. McGill
Publisher:
ISBN:
Category : Crop yields
Languages : en
Pages : 142
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Author: W. B. McGill
Publisher:
ISBN:
Category : Crop yields
Languages : en
Pages : 142
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Book Description
Author: Environment Council of Alberta
Publisher:
ISBN:
Category : Land use, Rural Alberta
Languages : en
Pages : 10
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Author: Marv Anderson & Associates
Publisher: Edmonton, Alta. : Environment Council of Alberta
ISBN:
Category : Agricultural experiment stations
Languages : en
Pages : 184
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Book Description
Author: C. K. K. Gachene
Publisher:
ISBN:
Category : Soil fertility
Languages : en
Pages : 172
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Book Description
Author: Isaac Phillips Roberts
Publisher:
ISBN:
Category : Fertilizers
Languages : en
Pages : 462
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Book Description
Author: Amitava Chatterjee
Publisher: John Wiley & Sons
ISBN: 0891183531
Category : Technology & Engineering
Languages : en
Pages : 160
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Book Description
In Soil Fertility Management in Agroecosystems, Editors Amitava Chatterjee and David Clay provide a thoughtful survey of important concepts in soil fertility management. For the requirements of our future workforce, it is imperative that we evolve our understanding of soil fertility. Agronomists and soil scientists are increasingly challenged by extreme climatic conditions. Farmers are experimenting with integrating cover crops into rotations and reducing the use of chemical fertilizers. In other words, there is no such a thing as a simple fertilizer recommendation in today's agriculture. Topics covered include crop-specific nutrient management, program assessment, crop models for decision making, optimization of fertilizer use, cover crops, reducing nitrous oxide emissions, natural abundance techniques, tile-drained conditions, and soil biological fertility.
Author: Kowligi R. Krishna
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 528
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Book Description
Soil fertility and crop management are the two most important ingredients in modern agricultural activity. This text explores research in the area, which is driven by the need to spread cropping zones, to intensify and obtain higher yields, and to achieve better nutrient balance.
Author: Jingyu Zhang
Publisher:
ISBN:
Category : Agricultural productivity
Languages : en
Pages : 0
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Book Description
Long-term agricultural management practices affect soil health. Five long-term rotations at the University of Alberta Breton Plots were sampled as part of the Soil Heath Institute (SHI) North American Project to Evaluate Soil Health Measurements (NAPESHM) in 2019: (1) check (no fertilizer addition), NPKS and manure fertility treatments of a wheat-fallow (WF) rotation; (2) check, NPKS and manure fertility treatments of a 5 yr cereal-forage rotation (with and without lime); (3) continuous forage (CF) receiving NPKS fertilizer; (4) continuous grain (CG) receiving NPKS fertilizer; and (5) an 8-yr "agro-ecological" rotation of barley, faba beans and forages receiving manure. In addition to the >25 soil health indicators measured as part of NAPESHM, soil moisture retention curves (SMRC), phospholipid fatty acid (PLFAs) profile, size distribution of water-stable aggregates and total C, N, 13C and 15N within each class of water-stable aggregates were measured on additional samples taken in 2020. These soil health indicators were used to calculate a site-specific soil health index (SPSHI) using methods similar to those used to develop the Cornell comprehensive assessment of soil health (CASH). Multivariate permutational multivariate analysis of variance (PERMANOVA) and non-metric multidimensional scaling (NMDS) were used to assess the significance of long-term crop rotation, fertilization and their interactions on the soil health indicators used to develop the SPSHI. The indicators in the SPSHI equation included autoclave-citrate-extractable (ACE) protein, pH, available P, Na, available water holding capacity (AWHC), the proportion of total carbon in aggregates (PTCA) and Phosphomonoesterase. The higher the SPSHI value, the better the soil health. The SPSHI values of each rotation-fertilizer treatment from high to low are 8-yr with manure (0.802), 5-yr cereal-forage with manure and lime (0.79), WF manure (0.686), 5-yr with manure (0.674), 5-yr NPKS with lime (0.633), CG NPKS (0.507), 5-yr check with lime (0.477), 5-yr NPKS (0.432), 5-yr check (0.418), WF with NPKS (0.403), CF with NPKS (0.389), and WF with check (0.38). The PERMANOVA results indicated significant effects of fertilizer treatments (p-value =0.0064), rotation treatments (p-value =0.0482) and their interaction (p-value =0.0095) on the soil health indicators. The primary difference in SPSHI values was caused by the difference of C and N input to soils, PTCA and pH in response to fertilizer, manure and rotations. The positive correlation between SPSHI values and crop yield is only weak to moderate, mainly because manure has a greater improvement on soil health than crop yield, whereas NPKS fertilizers had the opposite effect.
Author: Canada. Commission of Conservation
Publisher: King's Printer
ISBN:
Category : Agriculture
Languages : en
Pages : 98
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 252
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