soybean: Soil moisture and potassium doses on soybean culture

In JrEduardo/cmpreg: Reparametrized COM-Poisson Regression Models

Description

A study of potassium doses and soil moisture levels on soybean (Glicine Max) production. The tropical soils are usually poor in potassium (K) and demand potassium fertilization when cultivated with soybean to obtain satisfactory yields. Soybean production is affected by long exposition to water deficit. As potassium is a nutrient involved in the water balance in plant, by hyphotesis, a good supply of potassium avoids to reduce production. To evaluate the effects of potassium doses and soil humidity levels on soybean production, Serafim (2012) conducted a 5\times 3 factorial experiment in a randomized complete block design with 5 replicates. Five different potassium doses (0, 30, 60, 120 and 180 \times mg dm^{-3}) were applied to the soil and soil moisture levels were controlled at (37.5, 50, and 62.5%). The experiment was carried out in a greenhouse and the experimental units were pots with two plants in each.

Usage

data(soybean, package = "cmpreg")

Format

A tibble with 74 observations and 6 colums:

• K: Integer value indicated the potassium fertilization dose (in mg dm^{-3});

• water: Numerical value of amount of water in the soil (soil moisture in percent);

• block: Fatcor indicating block;

• seeds: Number of bean seeds at pot;

• vpods: Number of viable pods at pot;

• tpods: Total of pods at pot.

References

Serafim, M. E., F. B. Ono, W. M. Zeviani, J. O. Novelino, and J. V. Silva (2012). Umidade do solo e doses de potassio na cultura da soja. Revista Ciencia Agronomica, 43(2), 222-227.

JrEduardo/cmpreg documentation built on May 8, 2019, 4:41 p.m.