Accumulation Of Biomass And Mineral Elements By Peanut: Application Of The Expanded Growth Model
2014
Overman, A. R. | Scholtz, R. V.
A number of factors influence crop production including crop species, time of planting and sampling, level of fertilizer application, water availability (rainfall or irrigation), plant population, frequency of harvests (for perennials), soil characteristics, insect control, and weed control. A conceptual model is required within which measurements and observations can be interpreted. For this analysis the expanded growth model is used to described biomass accumulation with calendar time. Field data for peanut (Arachis hypogaea L.) grown in North Carolina on a sandy loam soil are used for this application. Measurements of biomass and mineral elements (nitrogen, phosphorus, potassium, and magnesium) were reported for whole plant and nuts (kernels + shells). The theory provided reasonable description of the results. It was concluded that the rate limiting process in the system was biomass accumulation by photosynthesis, and that accumulation of mineral elements proceeded in virtual equilibrium.
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