soybeanwp: Factorial experiment to evaluate the effect of potassium and...
In walmes/wzRfun: Walmes Zeviani's collection of functions

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The tropical soils, usually poor in potassium (K), demand potassium fertilization when cultivated with soybean (Glycine max L.) to obtain satisfactory yields. The aim of this study was to evaluate the effects of K doses and soil humidity levels on soybean agronomic characteristics. The experiment was carried out in a greenhouse, in pots with two plants, containing 5 dm$^3$ of soil. The experimental design was completely randomized block with treatments in a 5 x 3 factorial arrangement. The K doses (potassium) were 0; 30; 60, 120 and 180 mg dm^{-3} , and the soil humidity (water) ranged from 35 to 40; 47.5 to 52.5; and 60 to 65% of the total porosity (represented as the midpoint). The characteristics appraised were: grain yield (yield, grams per plot), weight of a hundred grains (w100, grams), total number of grains per plot (tg), K concentration in the grain (Kgrain, g kg^{-1}), number of viable and not viable pods (nvp, nip). Observation number 74 can be considered atypical and removed to do statistical analysis. although the experiment had been installed in blocks, the greenhouse had constant conditions for all plots and the management, like irrigation, during the experimental cycle was carried out with much care, so, the block effect can be considered null.

soybeanwp

A data frame with data from an experiment that evaluated the effect of water and potassium levels on soybean yield.

This experiment was done at Universidade Federal da Grande Dourados in Dourados, Mato Grosso do Sul, Brazil. The article based on this experiment can be accessed by the link http://ccarevista.ufc.br/seer/index.php/ccarevista/article/view/1454. Thanks for the authors by their collaboration and permission to use this data.

walmes/wzRfun documentation built on Aug. 10, 2021, 2:19 p.m.